EP3924523B1 - Leather agents for beamhouse - Google Patents
Leather agents for beamhouse Download PDFInfo
- Publication number
- EP3924523B1 EP3924523B1 EP19828654.4A EP19828654A EP3924523B1 EP 3924523 B1 EP3924523 B1 EP 3924523B1 EP 19828654 A EP19828654 A EP 19828654A EP 3924523 B1 EP3924523 B1 EP 3924523B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- metal salts
- salts
- alkaline earth
- alkali metal
- acids
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 239000010985 leather Substances 0.000 title claims description 30
- -1 alkali metal salts Chemical class 0.000 claims description 50
- 239000002253 acid Substances 0.000 claims description 47
- 150000007513 acids Chemical class 0.000 claims description 45
- 229910052784 alkaline earth metal Inorganic materials 0.000 claims description 37
- 239000000176 sodium gluconate Substances 0.000 claims description 33
- 235000012207 sodium gluconate Nutrition 0.000 claims description 33
- 229940005574 sodium gluconate Drugs 0.000 claims description 33
- 235000000346 sugar Nutrition 0.000 claims description 33
- 229910052783 alkali metal Inorganic materials 0.000 claims description 28
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims description 26
- AEQDJSLRWYMAQI-UHFFFAOYSA-N 2,3,9,10-tetramethoxy-6,8,13,13a-tetrahydro-5H-isoquinolino[2,1-b]isoquinoline Chemical compound C1CN2CC(C(=C(OC)C=C3)OC)=C3CC2C2=C1C=C(OC)C(OC)=C2 AEQDJSLRWYMAQI-UHFFFAOYSA-N 0.000 claims description 25
- CBOCVOKPQGJKKJ-UHFFFAOYSA-L Calcium formate Chemical compound [Ca+2].[O-]C=O.[O-]C=O CBOCVOKPQGJKKJ-UHFFFAOYSA-L 0.000 claims description 23
- 229940044172 calcium formate Drugs 0.000 claims description 23
- 239000004281 calcium formate Substances 0.000 claims description 23
- 235000019255 calcium formate Nutrition 0.000 claims description 23
- 238000000034 method Methods 0.000 claims description 22
- 150000003839 salts Chemical class 0.000 claims description 21
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical class CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims description 18
- 239000000203 mixture Substances 0.000 claims description 17
- 230000008961 swelling Effects 0.000 claims description 17
- BDAGIHXWWSANSR-UHFFFAOYSA-N formic acid Substances OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 claims description 16
- 229910052708 sodium Inorganic materials 0.000 claims description 16
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 15
- 239000004202 carbamide Substances 0.000 claims description 15
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 claims description 11
- 150000001875 compounds Chemical class 0.000 claims description 11
- 239000011734 sodium Substances 0.000 claims description 10
- HZAXFHJVJLSVMW-UHFFFAOYSA-N 2-Aminoethan-1-ol Chemical compound NCCO HZAXFHJVJLSVMW-UHFFFAOYSA-N 0.000 claims description 9
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 9
- XBDQKXXYIPTUBI-UHFFFAOYSA-N dimethylselenoniopropionate Chemical class CCC(O)=O XBDQKXXYIPTUBI-UHFFFAOYSA-N 0.000 claims description 9
- 239000011777 magnesium Substances 0.000 claims description 9
- 229910052749 magnesium Inorganic materials 0.000 claims description 9
- OSWFIVFLDKOXQC-UHFFFAOYSA-N 4-(3-methoxyphenyl)aniline Chemical class COC1=CC=CC(C=2C=CC(N)=CC=2)=C1 OSWFIVFLDKOXQC-UHFFFAOYSA-N 0.000 claims description 8
- HLCFGWHYROZGBI-JJKGCWMISA-M Potassium gluconate Chemical compound [K+].OC[C@@H](O)[C@@H](O)[C@H](O)[C@@H](O)C([O-])=O HLCFGWHYROZGBI-JJKGCWMISA-M 0.000 claims description 8
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 claims description 8
- 159000000007 calcium salts Chemical class 0.000 claims description 8
- ZBCBWPMODOFKDW-UHFFFAOYSA-N diethanolamine Chemical compound OCCNCCO ZBCBWPMODOFKDW-UHFFFAOYSA-N 0.000 claims description 8
- 239000004224 potassium gluconate Substances 0.000 claims description 8
- 235000013926 potassium gluconate Nutrition 0.000 claims description 8
- 229960003189 potassium gluconate Drugs 0.000 claims description 8
- 235000012208 gluconic acid Nutrition 0.000 claims description 7
- GMDNUWQNDQDBNQ-UHFFFAOYSA-L magnesium;diformate Chemical compound [Mg+2].[O-]C=O.[O-]C=O GMDNUWQNDQDBNQ-UHFFFAOYSA-L 0.000 claims description 7
- 238000004519 manufacturing process Methods 0.000 claims description 7
- RGHNJXZEOKUKBD-SQOUGZDYSA-N Gluconic acid Natural products OC[C@@H](O)[C@@H](O)[C@H](O)[C@@H](O)C(O)=O RGHNJXZEOKUKBD-SQOUGZDYSA-N 0.000 claims description 6
- 238000002791 soaking Methods 0.000 claims description 6
- RGHNJXZEOKUKBD-UHFFFAOYSA-N D-gluconic acid Natural products OCC(O)C(O)C(O)C(O)C(O)=O RGHNJXZEOKUKBD-UHFFFAOYSA-N 0.000 claims description 5
- 159000000003 magnesium salts Chemical class 0.000 claims description 5
- 239000011575 calcium Substances 0.000 claims description 4
- 235000019253 formic acid Nutrition 0.000 claims description 4
- 159000000001 potassium salts Chemical class 0.000 claims description 4
- 235000019260 propionic acid Nutrition 0.000 claims description 4
- IUVKMZGDUIUOCP-BTNSXGMBSA-N quinbolone Chemical class O([C@H]1CC[C@H]2[C@H]3[C@@H]([C@]4(C=CC(=O)C=C4CC3)C)CC[C@@]21C)C1=CCCC1 IUVKMZGDUIUOCP-BTNSXGMBSA-N 0.000 claims description 4
- 159000000000 sodium salts Chemical class 0.000 claims description 4
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 3
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 claims description 3
- 229910052791 calcium Inorganic materials 0.000 claims description 3
- 239000000174 gluconic acid Substances 0.000 claims description 3
- 229960003975 potassium Drugs 0.000 claims description 3
- 239000011591 potassium Substances 0.000 claims description 3
- 229910052700 potassium Inorganic materials 0.000 claims description 3
- 150000001735 carboxylic acids Chemical class 0.000 claims 2
- 238000004321 preservation Methods 0.000 claims 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 14
- 150000002169 ethanolamines Chemical class 0.000 description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 9
- 150000001340 alkali metals Chemical class 0.000 description 8
- 229910052751 metal Inorganic materials 0.000 description 7
- 239000002184 metal Substances 0.000 description 7
- 229910052757 nitrogen Inorganic materials 0.000 description 7
- 239000000126 substance Substances 0.000 description 7
- 239000002351 wastewater Substances 0.000 description 7
- 238000012360 testing method Methods 0.000 description 6
- UEGPKNKPLBYCNK-UHFFFAOYSA-L magnesium acetate Chemical compound [Mg+2].CC([O-])=O.CC([O-])=O UEGPKNKPLBYCNK-UHFFFAOYSA-L 0.000 description 5
- 229940069446 magnesium acetate Drugs 0.000 description 5
- 239000011654 magnesium acetate Substances 0.000 description 5
- 235000011285 magnesium acetate Nutrition 0.000 description 5
- 239000003795 chemical substances by application Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 3
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 3
- 235000011941 Tilia x europaea Nutrition 0.000 description 3
- 239000000654 additive Substances 0.000 description 3
- 230000000996 additive effect Effects 0.000 description 3
- 150000001844 chromium Chemical class 0.000 description 3
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 3
- 229950006191 gluconic acid Drugs 0.000 description 3
- 239000004571 lime Substances 0.000 description 3
- 238000005554 pickling Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- VMHLLURERBWHNL-UHFFFAOYSA-M Sodium acetate Chemical compound [Na+].CC([O-])=O VMHLLURERBWHNL-UHFFFAOYSA-M 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- DNJIEGIFACGWOD-UHFFFAOYSA-N ethyl mercaptane Natural products CCS DNJIEGIFACGWOD-UHFFFAOYSA-N 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 238000009472 formulation Methods 0.000 description 2
- 235000013379 molasses Nutrition 0.000 description 2
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 2
- 239000007800 oxidant agent Substances 0.000 description 2
- SCVFZCLFOSHCOH-UHFFFAOYSA-M potassium acetate Chemical compound [K+].CC([O-])=O SCVFZCLFOSHCOH-UHFFFAOYSA-M 0.000 description 2
- 231100000241 scar Toxicity 0.000 description 2
- 230000037390 scarring Effects 0.000 description 2
- 239000001632 sodium acetate Substances 0.000 description 2
- 235000017281 sodium acetate Nutrition 0.000 description 2
- HYHCSLBZRBJJCH-UHFFFAOYSA-M sodium hydrosulfide Chemical compound [Na+].[SH-] HYHCSLBZRBJJCH-UHFFFAOYSA-M 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 229940059867 sulfur containing product ectoparasiticides Drugs 0.000 description 2
- DGVVWUTYPXICAM-UHFFFAOYSA-N β‐Mercaptoethanol Chemical compound OCCS DGVVWUTYPXICAM-UHFFFAOYSA-N 0.000 description 2
- XIWRCSVXKPGGAJ-UHFFFAOYSA-N 1-(5-tert-butyl-2-phenylpyrazol-3-yl)-3-(4-chlorophenyl)urea Chemical compound C=1C=CC=CC=1N1N=C(C(C)(C)C)C=C1NC(=O)NC1=CC=C(Cl)C=C1 XIWRCSVXKPGGAJ-UHFFFAOYSA-N 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 244000007645 Citrus mitis Species 0.000 description 1
- 102000008186 Collagen Human genes 0.000 description 1
- 108010035532 Collagen Proteins 0.000 description 1
- DSLZVSRJTYRBFB-LLEIAEIESA-N D-glucaric acid Chemical compound OC(=O)[C@@H](O)[C@@H](O)[C@H](O)[C@@H](O)C(O)=O DSLZVSRJTYRBFB-LLEIAEIESA-N 0.000 description 1
- IAJILQKETJEXLJ-UHFFFAOYSA-N Galacturonsaeure Natural products O=CC(O)C(O)C(O)C(O)C(O)=O IAJILQKETJEXLJ-UHFFFAOYSA-N 0.000 description 1
- SXRSQZLOMIGNAQ-UHFFFAOYSA-N Glutaraldehyde Chemical compound O=CCCCC=O SXRSQZLOMIGNAQ-UHFFFAOYSA-N 0.000 description 1
- 229920000388 Polyphosphate Polymers 0.000 description 1
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 1
- 239000004280 Sodium formate Substances 0.000 description 1
- 239000004902 Softening Agent Substances 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 150000001242 acetic acid derivatives Chemical class 0.000 description 1
- 150000001252 acrylic acid derivatives Chemical class 0.000 description 1
- 150000001299 aldehydes Chemical class 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- AEMOLEFTQBMNLQ-WAXACMCWSA-N alpha-D-glucuronic acid Chemical compound O[C@H]1O[C@H](C(O)=O)[C@@H](O)[C@H](O)[C@H]1O AEMOLEFTQBMNLQ-WAXACMCWSA-N 0.000 description 1
- 229940037003 alum Drugs 0.000 description 1
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical class [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 description 1
- 229910052921 ammonium sulfate Inorganic materials 0.000 description 1
- 235000011130 ammonium sulphate Nutrition 0.000 description 1
- 230000000844 anti-bacterial effect Effects 0.000 description 1
- 239000003899 bactericide agent Substances 0.000 description 1
- 238000004061 bleaching Methods 0.000 description 1
- VSGNNIFQASZAOI-UHFFFAOYSA-L calcium acetate Chemical compound [Ca+2].CC([O-])=O.CC([O-])=O VSGNNIFQASZAOI-UHFFFAOYSA-L 0.000 description 1
- 239000001639 calcium acetate Substances 0.000 description 1
- 235000011092 calcium acetate Nutrition 0.000 description 1
- 229960005147 calcium acetate Drugs 0.000 description 1
- 150000001768 cations Chemical class 0.000 description 1
- 235000015165 citric acid Nutrition 0.000 description 1
- 229920001436 collagen Polymers 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
- 238000005238 degreasing Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000000975 dye Substances 0.000 description 1
- 238000004043 dyeing Methods 0.000 description 1
- 230000002255 enzymatic effect Effects 0.000 description 1
- 150000004675 formic acid derivatives Chemical class 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 150000002505 iron Chemical class 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- FEWJPZIEWOKRBE-LWMBPPNESA-N levotartaric acid Chemical compound OC(=O)[C@@H](O)[C@H](O)C(O)=O FEWJPZIEWOKRBE-LWMBPPNESA-N 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 235000010755 mineral Nutrition 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 150000002772 monosaccharides Chemical class 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 150000002989 phenols Chemical class 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000001205 polyphosphate Substances 0.000 description 1
- 235000011176 polyphosphates Nutrition 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 235000011056 potassium acetate Nutrition 0.000 description 1
- WFIZEGIEIOHZCP-UHFFFAOYSA-M potassium formate Chemical compound [K+].[O-]C=O WFIZEGIEIOHZCP-UHFFFAOYSA-M 0.000 description 1
- BWILYWWHXDGKQA-UHFFFAOYSA-M potassium propanoate Chemical compound [K+].CCC([O-])=O BWILYWWHXDGKQA-UHFFFAOYSA-M 0.000 description 1
- 239000004331 potassium propionate Substances 0.000 description 1
- 235000010332 potassium propionate Nutrition 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 235000021309 simple sugar Nutrition 0.000 description 1
- 229960004249 sodium acetate Drugs 0.000 description 1
- HLBBKKJFGFRGMU-UHFFFAOYSA-M sodium formate Chemical compound [Na+].[O-]C=O HLBBKKJFGFRGMU-UHFFFAOYSA-M 0.000 description 1
- 235000019254 sodium formate Nutrition 0.000 description 1
- JXKPEJDQGNYQSM-UHFFFAOYSA-M sodium propionate Chemical compound [Na+].CCC([O-])=O JXKPEJDQGNYQSM-UHFFFAOYSA-M 0.000 description 1
- 239000004324 sodium propionate Substances 0.000 description 1
- 235000010334 sodium propionate Nutrition 0.000 description 1
- 229960003212 sodium propionate Drugs 0.000 description 1
- 229910052938 sodium sulfate Inorganic materials 0.000 description 1
- 235000011152 sodium sulphate Nutrition 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 150000005621 tetraalkylammonium salts Chemical class 0.000 description 1
- 150000003608 titanium Chemical class 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 235000013311 vegetables Nutrition 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 150000003754 zirconium Chemical class 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C14—SKINS; HIDES; PELTS; LEATHER
- C14C—CHEMICAL TREATMENT OF HIDES, SKINS OR LEATHER, e.g. TANNING, IMPREGNATING, FINISHING; APPARATUS THEREFOR; COMPOSITIONS FOR TANNING
- C14C1/00—Chemical treatment prior to tanning
- C14C1/06—Facilitating unhairing, e.g. by painting, by liming
Definitions
- leather is made from a rawhide in several process steps.
- the process steps summarized as a water workshop are at the beginning of this process and prepare the rawhide for tanning, i.e. takes place before the actual tanning.
- the water workshop includes the work steps soaking, liming, deliming, pickling and pickling, which are typically carried out in this order.
- the liming takes place in an aqueous liquor, typically in so-called liming barrels or alternatively in liming reels.
- the hair and other non-leather parts of the skin are removed through the addition of process chemicals and the action of movement, and the skin is opened up ("opening up") by separating the collagen fibers.
- reducing sulfur-containing products eg Na 2 S, NaHS, mercaptoethanol, thioglycolic acids
- strong oxidizing agents eg H 2 O 2
- Yuhanf Zeng et al. "A Cleaner Deliming Process Using Sodium Gluconate for Reduction in Nitrogen Pollution in Leather Manufacture", JALCA, Vol 113, 2018, pages 19 to 25 , describes a formulation containing sodium gluconate, ammonium sulfate and citric acid for environmentally friendly deliming of limed animal skins.
- CH 647 259 and DE 39 03 499 disclose a use of sodium gluconate in a tanning solution containing an iron salt or titanium and aluminum ions.
- CN 107 653 350 A describes a formulation for leather coloring containing sodium gluconate.
- Ammonium, sodium, potassium, calcium and/or magnesium salts of sugar acids are preferably used in the present invention.
- Sodium and/or potassium salts of the sugar acids are particularly preferably used, very particularly preferably sodium salts of the sugar acids.
- Saccharic acids are polyhydroxycarboxylic acids that are formed from simple sugars (monosaccharides) by oxidation. These include aldonic acids (e.g. D-gluconic acid), uronic acids (e.g. D-glucuronic acid), aldaric acids (e.g. D-glucaric acid, D-threaric acid, D-mannosugar acid) and ketoaldonic acids (e.g. D-2-oxo-gluconic acid).
- aldonic acids e.g. D-gluconic acid
- uronic acids e.g. D-glucuronic acid
- aldaric acids e.g. D-glucaric acid, D-threaric acid, D-mannosugar acid
- ketoaldonic acids e.g. D-2-oxo-gluconic acid
- ammonium, sodium, potassium, calcium and/or magnesium salts of aldonic acids particularly preferably D-gluconic acid.
- ammonium, sodium and/or potassium gluconate, preferably sodium and/or potassium gluconate and particularly preferably sodium gluconate are used.
- Pseudo-alkali metal salts are understood to mean salts whose cations are not alkali metals but behave largely as such.
- the term is to be understood as ammonium and/or tetraalkylammonium salts.
- the effect of the sugar acid salts according to the invention can be improved by using them together with alkaline earth metal formates, preferably magnesium and/or calcium formate, particularly preferably with calcium formate.
- the effect of the salts of sugar acids according to the invention can be optimized by combining them with alkaline earth metal salts of C 1 -C 3 carboxylic acids, preferably magnesium and / or calcium salts of formic, acetic or propionic acid, particularly preferably magnesium and / or Calcium salts of formic acid and most preferably used with calcium formate.
- alkaline earth metal salts of C 1 -C 3 carboxylic acids preferably magnesium and / or calcium salts of formic, acetic or propionic acid, particularly preferably magnesium and / or Calcium salts of formic acid and most preferably used with calcium formate.
- An increase in activity can also be achieved by using the salts of sugar acids according to the invention together with ethanolamines (i.e. monoethanolamine, diethanolamine and/or triethanolamine) or urea.
- ethanolamines i.e. monoethanolamine, diethanolamine and/or triethanolamine
- the effect of the above salts of sugar acids can be increased by using a combination of alkaline earth metal salts of C 1 -C 3 carboxylic acids and ethanolamines or urea.
- the salts of sugar acids according to the invention can be used in combination with alkali metal salts of C 1 -C 3 carboxylic acids, in particular sodium formate, sodium acetate, sodium propionate, potassium formate, potassium acetate and/or potassium propionate, which can certainly be used together with alkaline earth metal salts of C 1 -C 3 carboxylic acids, Ethanolamines or urea can be done.
- alkali metal salts of C 1 -C 3 carboxylic acids in particular sodium formate, sodium acetate, sodium propionate, potassium formate, potassium acetate and/or potassium propionate, which can certainly be used together with alkaline earth metal salts of C 1 -C 3 carboxylic acids, Ethanolamines or urea can be done.
- the present invention also relates to methods as defined in claim 9 for treating animal hides in liming using pseudoalkali metal, alkali metal and/or alkaline earth metal salts of sugar acids, these being added to the liquor in which the hides are treated.
- This treatment also includes variants in which the pseudoalkali metal, alkali metal and/or alkaline earth metal salts of the sugar acids are added to the liquor before liming in the soak.
- the compounds listed above which support the action of the swelling regulators such as alkaline earth metal formates, alkaline earth metal acetates, alkaline earth metal propionates, ethanolamines and/or urea, are additionally added to the liquor.
- the liquor in which the hides are treated in liming typically contains other compounds known to those skilled in the art, such as reducing sulfur-containing products (e.g. Na 2 S, NaHS, mercaptoethanol, thioglycolic acids), strong oxidizing agents (e.g. H 2 O 2 ) and/or strongly alkaline substances (e.g. lime).
- reducing sulfur-containing products e.g. Na 2 S, NaHS, mercaptoethanol, thioglycolic acids
- strong oxidizing agents e.g. H 2 O 2
- strongly alkaline substances e.g. lime
- the present invention also relates to processes for the production of leather as defined in claim 10, including the treatment of animal hides according to the invention.
- Said methods can also include leather production steps familiar to the person skilled in the art, such as soaking, fleshing, splitting, deliming, enzymatic bating, degreasing, pickling, tanning, dewatering, folding, bleaching, retanning, dyeing, fatliquoring, stretching out, drying, moistening, softening and dry dressing.
- Tanning is preferably carried out with mineral tanning agents such as aluminum salts, in particular alum, trivalent chromium salts, zirconium salts, iron, zinc or titanium salts, with polyphosphates, with aldehydes such as formaldehyde and glutardialdehyde, with synthetic tanning agents based on phenol derivatives (syntans) or with polymer tanning agents (Resin tanning agents) such as acrylates and polyurethanes or vegetable dyes.
- mineral tanning agents such as aluminum salts, in particular alum, trivalent chromium salts, zirconium salts, iron, zinc or titanium salts, with polyphosphates, with aldehydes such as formaldehyde and glutardialdehyde, with synthetic tanning agents based on phenol derivatives (syntans) or with polymer tanning agents (Resin tanning agents) such as acrylates and polyurethanes or vegetable dyes.
- Tanning is particularly preferably
- the addition of ethanolamines and urea is dispensed with in the process according to the invention or in the use according to the invention of salts of sugar acids, since this can reduce the introduction of nitrogen into the waste water.
- alkali metal salts of gluconic acids particularly preferably sodium gluconate, are used in the method according to the invention or in the use according to the invention.
- based on the salt weight of the rawhide used from 0.05 to 5.0% by weight, preferably from 0.1 to 2.0% by weight and particularly preferred from 0.2 to 1.0% by weight of pseudoalkaline metal, alkali metal and/or alkaline earth metal salts of sugar acids are used.
- the tanner understands the salt weight to be the weight that the skin has after it has been preserved with salt.
- the preserved skin typically has a moisture content of 35% by weight.
- the present invention also includes leather additive compositions containing one or more pseudoalkali metal, alkali metal and/or alkaline earth metal salts of sugar acids, preferably ammonium, sodium and/or potassium salts of sugar acids, particularly preferably sodium salts of sugar acids.
- leather auxiliary compositions according to the invention contain one or more pseudoalkali metal, alkali metal and/or alkaline earth metal salts of gluconic acid, preferably ammonium, sodium and/or potassium gluconate, particularly preferably sodium gluconate, the leather auxiliary compositions additionally containing one or more compounds from the group containing alkaline earth metal salts of C C 1 -C 3 carboxylic acids, monoethanolamine, diethanolamine, triethanolamine and urea, preferably magnesium and/or calcium salts of formic, acetic or propionic acid, monoethanolamine, diethanolamine, triethanolamine and urea, especially preferably magnesium and/or calcium salts of formic or acetic acid and most preferably calcium formate.
- compositions mentioned contain ammonium, sodium and/or potassium gluconate in combination with magnesium formate, calcium formate, magnesium acetate and/or calcium acetate, preferably sodium and/or potassium gluconate in combination with magnesium formate and/or calcium formate.
- the leather auxiliary composition preferably contains sodium gluconate and one or more compounds from the group containing calcium formate and magnesium formate, preferably calcium formate.
- the ratio of the pseudoalkali metal, alkali metal and/or alkaline earth metal salts of sugar acids to the compounds from the group comprising alkaline earth metal formates, alkaline earth metal acetates, alkaline earth metal propionates, monoethanolamine, diethanolamine, triethanolamine and urea in the leather auxiliary composition is 10:90 to 90:10, preferably from 20:80 to 80:20 and more preferably from 30:70 to 70:30.
- the ratio is determined as the quotient of the total mass of the compounds used of the above salts of sugar acids to the total mass of the compounds used of the above formates, acetates and propionates.
- the leather auxiliary compositions according to the invention are swell regulators, in particular swell regulators for the water workshop, preferably swell regulators for use in soaking or liming, most preferably swell regulators for use in liming.
- the leather auxiliary compositions according to the invention can be in liquid or in solid form.
- the leather auxiliary composition according to the invention is in the form of a solid at 25° C., ideally in particulate form, such as, for example, powder, granules or pellets.
- the screening tests were carried out on DIN A4 rawhide samples. These were cut from the core of a salted rawhide so that all samples had a similar fiber structure. The samples in a series were taken from the same hide as the fibrous structure of the hide differs from animal to animal. The specimens were weighed individually. All percentages in the process recipe refer to this weight (the rawhide salt weight).
- the test procedure included the process steps "soaking” and “liming”.
- the amounts of chemicals and products used in the process, as well as the amount of water, are percentages by weight based on the rawhide salt weight of each sample.
- the amounts were weighed on a scale with an accuracy of 0.5 g.
- test tanning drums diameter 300 mm with temperature control (manufacturer Dose).
- the process temperature was kept constant at 28°C +/- 1°C.
- the specimens were placed individually in the sample barrel and 200% water (based on the salt weight) at a temperature of 28° C. and 0.3% Peltec BH softening agent (mixture of surfactant and bactericide from LANXESS Deutschland GmbH) were added.
- the test barrel was rotated at 10 RPM for 300 minutes.
- the liquor (process water) was then drained.
- the specimen was then dabbed off, weighed and the average thickness determined at four measuring points.
- the specimen was placed back into the test barrel and 200% water at a temperature of 28°C was added and rotated for 15 minutes. The remaining salt content of the liquor was then determined. This should not exceed 3.5°Bé. If the salt content is too high, the liquor must be changed once.
- the swelling regulator was added to the liquor and the test barrel was rotated for 60 minutes. It was then weighed and the average thickness determined. The specimen was placed back in the float, 3% lime (Ca(OH) 2 ) and 2.5% Na 2 S added and rotated for 4 hours. This was followed by 15 hours of drum rotation at intervals (rotate 10 minutes/pause 50 minutes). The pH of the liquor was then measured (pH 12-12.5), the specimen is removed, weighed again and the average thickness measured. The swelling was determined from the increase in thickness.
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Description
Während des Lederherstellung wird aus einer Rohhaut in mehreren Prozessschritten Leder hergestellt. Die als Wasserwerkstatt zusammengefassten Prozessschritte stehen am Anfang dieses Verfahrens und bereitet die Rohhaut auf die Gerbung vor, d.h. findet vor der eigentlichen Gerbung statt. Die Wasserwerkstatt umfasst die typischerweise in dieser Reihenfolge vorgenommenen Arbeitsschritte Weiche, Äscher, Entkälkung, Beize und Pickel.During leather production, leather is made from a rawhide in several process steps. The process steps summarized as a water workshop are at the beginning of this process and prepare the rawhide for tanning, i.e. takes place before the actual tanning. The water workshop includes the work steps soaking, liming, deliming, pickling and pickling, which are typically carried out in this order.
Der Äscher erfolgt in wässriger Flotte typischerweise in sogenannten Äscherfässern oder alternativ in Äscherhaspeln. Hierbei werden durch Zugabe von Prozesschemikalien und der Bewegungseinwirkung die Haare und andere Nicht-Leder gebende Hautbestandteile entfernt und ein Hautaufschluss ("opening up") durch die Separierung der Kollagenfasern erreicht. Hierbei werden für die Haarentfernung üblicherweise entweder reduzierende schwefelhaltige Produkte (z.B. Na2S, NaHS, Mercaptoethanol, Thioglycolsäuren) oder starke Oxidationsmitteln (z.B. H2O2) zugegeben. Für den Hautaufschluss werden meist Kalk oder andere alkalische Stoffe hinzugegeben.The liming takes place in an aqueous liquor, typically in so-called liming barrels or alternatively in liming reels. The hair and other non-leather parts of the skin are removed through the addition of process chemicals and the action of movement, and the skin is opened up ("opening up") by separating the collagen fibers. In this case, either reducing sulfur-containing products (eg Na 2 S, NaHS, mercaptoethanol, thioglycolic acids) or strong oxidizing agents (eg H 2 O 2 ) are usually added for hair removal. Lime or other alkaline substances are usually added to open the skin.
Durch Zugabe dieser Stoffe steigt der pH in der Flotte und in der Haut auf üblicherweise ca. 11,8 - 12,5. Dies führt zu einer deutlichen Alkalischwellung der Haut. Abhängig von Wassermenge, Produktzugabe, Bewegungseinwirkung und Hautstruktur ist diese Schwellung der Haut unterschiedlich stark ausgeprägt. Eine starke Alkalischwellung führt in Verbindung mit der Fass-/Haspelbewegung zu Qualitätseinbußen am fertigen Leder in Form ausgeprägter Mastriefen ("growth marks") oder Narbenzug ("lime draw") in lose strukturierten Hautpartien. Durch die Verwendung von Schwellungsregulatoren wird die Narbenschwellung verringert, so dass ausgeprägte Mastriefen und Narbenzug vermieden werden können. Eine starke Schwellungsreduzierung bringt jedoch meist den Nachteil einer erhöhten Losnarbigkeit in den locker strukturierten Hautpartien mit sich, d.h. die Oberschicht der Haut haftet nicht mehr richtig am Corium. Dies manifestiert sich dann beim Biegen des Leders durch wulstartiges Aufwerfen des Narben, d.h. in schlechterer Festnarbigkeit.By adding these substances, the pH in the liquor and in the skin usually rises to around 11.8 - 12.5. This leads to a significant alkaline swelling of the skin. Depending on the amount of water, product addition, exposure to movement and skin structure, this swelling of the skin varies in severity. Strong alkaline swelling in connection with the drum/reel movement leads to quality losses in the finished leather in the form of pronounced growth marks or lime draw in loosely structured skin areas. Scar swelling is reduced by using swelling regulators, so that pronounced skin marks and scarring can be avoided. However, a strong reduction in swelling usually has the disadvantage of increased loose scarring in the loosely structured areas of the skin, i.e. the upper layer of the skin no longer adheres properly to the corium. This then manifests itself when the leather is bent by bulging of the grain, i.e. poorer tightness of the grain.
Als Schwellungsregulatoren werden im Stand der Technik zumeist Ethanolamine und zum Teil auch Zucker (z.B. Melasse) verwendet, wobei letztere aber wegen geringer Effizienz in relativ großer Menge eingesetzt werden müssen.In the prior art, mostly ethanolamines and sometimes also sugar (eg molasses) are used as swelling regulators, although the latter have to be used in relatively large amounts because of their low efficiency.
Alle während der Wasserwerkstatt zugesetzten Produkte werden nicht permanent in der Haut gebunden, sondern verbleiben in der Äscherflotte, den Waschflotten oder den Flotten der Folgeprozesse (z.B. Entkälkung). Somit führen die Zugaben aller Prozesschemikalien endgültig zur Erhöhung der Schmutzfracht des Abwassers.All products added during the water workshop are not permanently bound in the skin, but remain in the liming liquor, the washing liquor or the liquors of the subsequent processes (e.g. deliming). The addition of all process chemicals thus ultimately leads to an increase in the dirt load of the wastewater.
Die Anforderungen zur Vermeidung von Abwässern und Reduzierung der Schmutzfrachten ist in den vergangenen Jahren stetig gestiegen und werden sich vermutlich weiter verschärfen. Gerade der zusätzliche Eintrag von Stickstoff führt neben hohem COD-Gehalten zu Kapazitätsengpässen der Kläranlagen. Daher ist die Reduzierung des Stickstoff- aber auch des COD-eintrags ein kontinuierlicher Entwicklungsschwerpunkt der Lederhilfsmittelindustrie. Allerdings kann derzeit aus Qualitätsgründen trotz der schlechteren Abwasserwerte auf diese Aminoethanol- bzw. melassehaltigen Produkte nicht verzichtet werden. Sie finden sich somit in fast allen Gerbereien der Welt.The requirements for avoiding waste water and reducing pollution loads have increased steadily in recent years and will probably become more stringent. In addition to high COD levels, the additional input of nitrogen in particular leads to capacity bottlenecks in the sewage treatment plants. Therefore, the reduction of both nitrogen and COD input is a continuous focus of development in the leather auxiliaries industry. However, for quality reasons, these aminoethanol and molasses-containing products cannot currently be dispensed with, despite the poorer wastewater values. They can therefore be found in almost all tanneries in the world.
Vor diesem Hintergrund bestand ein Bedarf an alternativen Schwellungsregulatoren, welche die Nachteile des Stands der Technik vermeiden und eine ausbalanciertes Eigenschaftsprofil aufweisen hinsichtlich der Schwellung und Festnarbigkeit des zu erzeugenden Leders einerseits und des Stickstoff- oder COD-Eintrags in das Abwasser andererseits. Überraschend wurde nun gefunden, dass die erfindungsgemäße Aufgabe gelöst wird durch Verwendung von Pseudoalkalimetall-, Alkalimetall-, und/oder Erdalkalimetallsalzen der Zuckersäuren bei der Lederherstellung, bei Verwendung dieser Substanzen als Schwellungsregulator in der Weiche, im Äscher oder in der Weiche und im Äscher, ganz besonders im Äscher.Against this background, there was a need for alternative swelling regulators that avoid the disadvantages of the prior art and have a balanced property profile with regard to swelling and tight graining of the leather to be produced on the one hand and nitrogen or COD entry into the waste water on the other. Surprisingly, it has now been found that the object of the invention is achieved by using pseudoalkali metal, alkali metal and/or alkaline earth metal salts of sugar acids in leather production, when using these substances as swelling regulators in the soak, in the liming or in the soak and in the liming, especially in the ash.
Bevorzugt werden bei der vorliegenden Erfindung Ammonium-, Natrium-, Kalium-, Calcium- und/oder Magnesiumsalze der Zuckersäuren verwendet.Ammonium, sodium, potassium, calcium and/or magnesium salts of sugar acids are preferably used in the present invention.
Besonders bevorzugt werden Natrium- und/oder Kaliumsalze der Zuckersäuren verwendet, ganz besonders bevorzugt Natriumsalze der Zuckersäuren.Sodium and/or potassium salts of the sugar acids are particularly preferably used, very particularly preferably sodium salts of the sugar acids.
Unter Zuckersäuren versteht man Polyhydroxycarbonsäuren, die durch Oxidation aus einfachen Zuckern (Monosacchariden) entstehen. Hierzu gehören Aldonsäuren (z.B. D-Gluconsäure), Uronsäuren (z.B. D-Glucuronsäure), Aldarsäuren ( z.B. D-Glucarsäure, D-Threarsäure, D-Mannozuckersäure) und Ketoaldonsäuren (z.B. D-2-Oxo-gluconsäure).Saccharic acids are polyhydroxycarboxylic acids that are formed from simple sugars (monosaccharides) by oxidation. These include aldonic acids (e.g. D-gluconic acid), uronic acids (e.g. D-glucuronic acid), aldaric acids (e.g. D-glucaric acid, D-threaric acid, D-mannosugar acid) and ketoaldonic acids (e.g. D-2-oxo-gluconic acid).
Bevorzugt werden bei der vorliegenden erfindungsgemäßen Verwendung Ammonium-, Natrium-, Kalium-, Calcium- und/oder Magnesiumsalze der Aldonsäuren, besonders bevorzugt der D-Gluconsäure eingesetzt.In the present use according to the invention, preference is given to using ammonium, sodium, potassium, calcium and/or magnesium salts of aldonic acids, particularly preferably D-gluconic acid.
In einer bevorzugten Ausführungsform werden Ammonium-, Natrium- und/oder Kaliumgluconat, bevorzugt Natrium- und/oder Kaliumgluconat und besonders bevorzugt Natriumgluconat eingesetzt.In a preferred embodiment, ammonium, sodium and/or potassium gluconate, preferably sodium and/or potassium gluconate and particularly preferably sodium gluconate are used.
Als Pseudoalkalimetallsalze sind Salze zu verstehen, deren Kationen keine Alkalimetalle sind, aber sich weitgehend wie solche verhalten. Der Begriff ist im Sinne der vorliegenden Erfindung zu verstehen als Ammonium- und/oder Tetraalkylammoniumsalze.Pseudo-alkali metal salts are understood to mean salts whose cations are not alkali metals but behave largely as such. For the purposes of the present invention, the term is to be understood as ammonium and/or tetraalkylammonium salts.
Die Wirkung der erfindungsgemäßen Salze der Zuckersäuren kann verbessert werden, in dem man diese zusammen mit Erdalkalimetallformiaten, vorzugsweise Magnesium- und/oder Calciumformiat, besonders bevorzugt mit Calciumformiat verwendet.The effect of the sugar acid salts according to the invention can be improved by using them together with alkaline earth metal formates, preferably magnesium and/or calcium formate, particularly preferably with calcium formate.
Weiterhin kann die Wirkung der erfindungsgemäßen Salze der Zuckersäuren optimiert werden, in dem man diese zusammen mit Erdalkalimetallsalzen von C1-C3 Carbonsäuren, vorzugsweise Magnesium- und/oder Calciumsalzen der Ameisen-, Essig- oder Propionsäure, besonders bevorzugt Magnesium- und/oder Calciumsalzen der Ameisensäure und meist bevorzugt mit Calciumformiat verwendet.Furthermore, the effect of the salts of sugar acids according to the invention can be optimized by combining them with alkaline earth metal salts of C 1 -C 3 carboxylic acids, preferably magnesium and / or calcium salts of formic, acetic or propionic acid, particularly preferably magnesium and / or Calcium salts of formic acid and most preferably used with calcium formate.
Auch durch die Verwendung der erfindungsgemäßen Salze der Zuckersäuren zusammen mit Ethanolaminen (d.h. Monoethanolamin, Diethanolamin und/oder Triethanolamin) oder Harnstoff kann eine Wirkungssteigerung erzielt werden.An increase in activity can also be achieved by using the salts of sugar acids according to the invention together with ethanolamines (i.e. monoethanolamine, diethanolamine and/or triethanolamine) or urea.
Nicht zuletzt kann die Wirkung der obigen Salze der Zuckersäuren durch die Verwendung einer Kombination von Erdalkalimetallsalzen von C1-C3 Carbonsäuren und Ethanolaminen oder Harnstoff gesteigert werden.Last but not least, the effect of the above salts of sugar acids can be increased by using a combination of alkaline earth metal salts of C 1 -C 3 carboxylic acids and ethanolamines or urea.
Alternativ ist die Verwendung der erfindungsgemäßen Salze der Zuckersäuren in Kombination mit Alkalimetallsalzen der C1-C3 Carbonsäuren, insbesondere Natriumformiat, Natriumacetat, Natriumpropionat, Kaliumformiat, Kaliumacetat und/oder Kaliumpropionat möglich, welcher durchaus zusammen mit Erdalkalimetallsalzen von C1-C3 Carbonsäuren, Ethanolaminen oder Harnstoff erfolgen kann.Alternatively, the salts of sugar acids according to the invention can be used in combination with alkali metal salts of C 1 -C 3 carboxylic acids, in particular sodium formate, sodium acetate, sodium propionate, potassium formate, potassium acetate and/or potassium propionate, which can certainly be used together with alkaline earth metal salts of C 1 -C 3 carboxylic acids, Ethanolamines or urea can be done.
Die vorliegende Erfindung betrifft auch Verfahren wie in Anspruch 9 definiert zur Behandlung von tierischen Häuten im Äscher unter Verwendung von Pseudoalkalimetall-, Alkalimetall-, und/oder Erdalkalimetallsalzen der Zuckersäuren, wobei diese der Flotte zugegeben werden, in der die Behandlung der Häute erfolgt. Diese Behandlung umfasst auch Varianten, bei denen die Zugabe der Pseudoalkalimetall-, Alkalimetall-, und/oder Erdalkalimetallsalzen der Zuckersäuren zur Flotte bereits vor dem Äscher in der Weiche erfolgt.The present invention also relates to methods as defined in claim 9 for treating animal hides in liming using pseudoalkali metal, alkali metal and/or alkaline earth metal salts of sugar acids, these being added to the liquor in which the hides are treated. This treatment also includes variants in which the pseudoalkali metal, alkali metal and/or alkaline earth metal salts of the sugar acids are added to the liquor before liming in the soak.
In einer bevorzugten Ausführungsform werden der Flotte zusätzlich oben aufgeführte Verbindungen zugegeben, die die Wirkung der Schwellungsregler unterstützen, wie Erdalkalimetallformiate, Erdalkalimetallacetate, Erdalkalimetallpropionate, Ethanolamine und/oder Harnstoff.In a preferred embodiment, the compounds listed above which support the action of the swelling regulators, such as alkaline earth metal formates, alkaline earth metal acetates, alkaline earth metal propionates, ethanolamines and/or urea, are additionally added to the liquor.
Die Flotte in der die Behandlung der Häute im Äscher erfolgt enthält typischerweise noch weitere, dem Fachmann bekannte Verbindungen, wie reduzierende schwefelhaltige Produkte (z.B. Na2S, NaHS, Mercaptoethanol, Thioglycolsäuren), starke Oxidationsmittel (z.B. H2O2) und/oder stark alkalische Stoffe (z.B. Kalk).The liquor in which the hides are treated in liming typically contains other compounds known to those skilled in the art, such as reducing sulfur-containing products (e.g. Na 2 S, NaHS, mercaptoethanol, thioglycolic acids), strong oxidizing agents (e.g. H 2 O 2 ) and/or strongly alkaline substances (e.g. lime).
Die vorliegende Erfindung betrifft auch Verfahren zur Herstellung von Leder wie in Anspruch 10 definiert, beinhaltend die erfindungsgemäße Behandlung von tierischen Häuten. Besagte Verfahren können weiterhin dem Fachmann vertraute Schritte der Lederherstellung umfassen, wie z.B. Weiche, Entfleischen, Spalten, Entkälkung, Enzymatische Beize, Entfettung, Pickel, Gerbung, Entwässern, Falzen, Bleichen, Nachgerben, Färben, Fetten, Ausrecken, Trocknen, Anfeuchten, Weichmachen und Trockenzurichtung.The present invention also relates to processes for the production of leather as defined in claim 10, including the treatment of animal hides according to the invention. Said methods can also include leather production steps familiar to the person skilled in the art, such as soaking, fleshing, splitting, deliming, enzymatic bating, degreasing, pickling, tanning, dewatering, folding, bleaching, retanning, dyeing, fatliquoring, stretching out, drying, moistening, softening and dry dressing.
Die Gerbung erfolgt bevorzugt mit Mineralgerbstoffen wie Aluminiumsalzen, insbesondere Alaunen, dreiwertigen Chromsalzen, Zirkoniumsalzen, Eisen-, Zink- oder Titansalzen, mit Polyphosphaten, mit Aldehyden wie Formaldehyd und Glutardialdehyd, mit synthetischen Gerbstoffen auf Basis von Phenolderivaten (Syntanen) oder mit Polymer-Gerbstoffen (Harzgerbstoffen) wie Acrylate und Polyurethane oder Vegetabilfarbstoffen. Besonders bevorzugt erfolgt die Gerbung mit dreiwertigen Chromsalzen oder Syntanen. Am meisten bevorzugt erfolgt die Gerbung mit dreiwertigen Chromsalzen.Tanning is preferably carried out with mineral tanning agents such as aluminum salts, in particular alum, trivalent chromium salts, zirconium salts, iron, zinc or titanium salts, with polyphosphates, with aldehydes such as formaldehyde and glutardialdehyde, with synthetic tanning agents based on phenol derivatives (syntans) or with polymer tanning agents (Resin tanning agents) such as acrylates and polyurethanes or vegetable dyes. Tanning is particularly preferably carried out with trivalent chromium salts or syntans. Tanning is most preferably carried out with trivalent chromium salts.
In bevorzugten Ausführungsformen wird bei erfindungsgemäßen Verfahren bzw. bei der erfindungsgemäßen Verwendung von Salzen der Zuckersäuren auf Zugabe von Ethanolaminen und Harnstoff verzichtet, da dadurch der Eintrag von Stickstoff ins Abwasser reduziert werden kann.In preferred embodiments, the addition of ethanolamines and urea is dispensed with in the process according to the invention or in the use according to the invention of salts of sugar acids, since this can reduce the introduction of nitrogen into the waste water.
In bevorzugten Ausführungsformen werden bei erfindungsgemäßen Verfahren bzw. bei der erfindungsgemäßen Verwendung Alkalimetallsalze der Gluconsäuren, besonders bevorzugt Natriumgluconat eingesetzt.In preferred embodiments, alkali metal salts of gluconic acids, particularly preferably sodium gluconate, are used in the method according to the invention or in the use according to the invention.
In bevorzugten Ausführungsformen werden bei dem erfindungsgemäßen Verfahren bzw. bei der erfindungsgemäßen Verwendung bezogen auf das Salzgewicht der eingesetzten Rohhaut von 0,05 bis 5,0 Gew.-%, vorzugsweise von 0,1 bis 2,0 Gew.-% und besonders bevorzugt von 0.2 bis 1.0 Gew.-% Pseudoalkalimetall-, Alkalimetall-, und/oder Erdalkalimetallsalze der Zuckersäuren verwendet.In preferred embodiments, in the method according to the invention or in the use according to the invention, based on the salt weight of the rawhide used, from 0.05 to 5.0% by weight, preferably from 0.1 to 2.0% by weight and particularly preferred from 0.2 to 1.0% by weight of pseudoalkaline metal, alkali metal and/or alkaline earth metal salts of sugar acids are used.
Unter dem Salzgewicht versteht der Gerber das Gewicht, dass die Haut nach der erfolgten Konservierung mit Salz besitzt. Dabei hat die konservierte Haut typischerweise einen Feuchtigkeitsgehalt von 35 Gew.-%.The tanner understands the salt weight to be the weight that the skin has after it has been preserved with salt. The preserved skin typically has a moisture content of 35% by weight.
Weitere bevorzugten Ausführungsformen des erfindungsgemäßen Verfahrens bzw. der der erfindungsgemäßen Verwendung betreffen die Kombination von Alkalimetallsalzen der Gluconsäuren mit Erdalkalimetallformiaten allein oder zusammen mit Erdalkalimetallacetaten, und/oder Erdalkalimetallpropionaten.Further preferred embodiments of the method according to the invention or the use according to the invention relate to the combination of alkali metal salts of gluconic acids with alkaline earth metal formates alone or together with alkaline earth metal acetates and/or alkaline earth metal propionates.
Weitere bevorzugten Ausführungsformen des erfindungsgemäßen Verfahrens bzw. der der erfindungsgemäßen Verwendung betreffen die Kombination von Natriumgluconat mit Magnesium- und/oder Calciumformiat.Further preferred embodiments of the method according to the invention or the use according to the invention relate to the combination of sodium gluconate with magnesium and/or calcium formate.
Weitere bevorzugten Ausführungsformen des erfindungsgemäßen Verfahrens bzw. der der erfindungsgemäßen Verwendung betreffen die Kombination von Natriumgluconat mit Magnesium- und/oder Calciumformiat und Alkali- oder Erdalkalimetallacetaten und/oder Erdalkalimetallpropionaten.Further preferred embodiments of the method according to the invention or the use according to the invention relate to the combination of sodium gluconate with magnesium and/or calcium formate and alkali or alkaline earth metal acetates and/or alkaline earth metal propionates.
Die vorliegende Erfindung umfasst auch Lederhilfsmittelzusammensetzungen enthaltend ein oder mehrere Pseudoalkalimetall-, Alkalimetall-, und/oder Erdalkalimetallsalze der Zuckersäuren, vorzugsweise Ammonium-, Natrium- und/oder Kaliumsalze der Zuckersäuren, besonders bevorzugt Natriumsalze der Zuckersäuren.The present invention also includes leather additive compositions containing one or more pseudoalkali metal, alkali metal and/or alkaline earth metal salts of sugar acids, preferably ammonium, sodium and/or potassium salts of sugar acids, particularly preferably sodium salts of sugar acids.
Vorteilhafterweise enthalten erfindungsgemäße Lederhilfsmittelzusammensetzungen ein oder mehrere Pseudoalkalimetall-, Alkalimetall-, und/oder Erdalkalimetallsalze der Gluconsäure, vorzugsweise Ammonium-, Natrium- und/oder Kaliumgluconat, besonders bevorzugt Natriumgluconat, wobei die Lederhilfsmittelzusammensetzungen zusätzlich ein oder mehrere Verbindungen aus der Gruppe enthaltend Erdalkalimetallsalze von C1-C3 Carbonsäuren, Monoethanolamin, Diethanolamin, Triethanolamin und Harnstoff, vorzugsweise Magnesium- und/oder Calciumsalze der Ameisen-, Essig- oder Propionsäure, Monoethanolamin, Diethanolamin, Triethanolamin und Harnstoff, besonders bevorzugt Magnesium- und/oder Calciumsalze der Ameisen- oder Essigsäure und meist bevorzugt Calciumformiat, enthalten.Advantageously, leather auxiliary compositions according to the invention contain one or more pseudoalkali metal, alkali metal and/or alkaline earth metal salts of gluconic acid, preferably ammonium, sodium and/or potassium gluconate, particularly preferably sodium gluconate, the leather auxiliary compositions additionally containing one or more compounds from the group containing alkaline earth metal salts of C C 1 -C 3 carboxylic acids, monoethanolamine, diethanolamine, triethanolamine and urea, preferably magnesium and/or calcium salts of formic, acetic or propionic acid, monoethanolamine, diethanolamine, triethanolamine and urea, especially preferably magnesium and/or calcium salts of formic or acetic acid and most preferably calcium formate.
Weitere vorteilhafte der genannten Lederhilfsmittelzusammensetzungen enthalten Ammonium-, Natrium- und/oder Kaliumgluconat in Kombination mit Magnesiumformiat, Calciumformiat, Magnesiumacetat und/oder Calciumacetat, bevorzugt Natrium- und/oder Kaliumgluconat in Kombination mit Magnesiumformiat und/oder Calciumformiat.Other advantageous leather auxiliary compositions mentioned contain ammonium, sodium and/or potassium gluconate in combination with magnesium formate, calcium formate, magnesium acetate and/or calcium acetate, preferably sodium and/or potassium gluconate in combination with magnesium formate and/or calcium formate.
Bevorzugt enthält die Lederhilfsmittelzusammensetzung Natriumgluconat und ein oder mehrere Verbindungen aus der Gruppe enthaltend Calciumformiat und Magnesiumformiat, vorzugsweise Calciumformiat.The leather auxiliary composition preferably contains sodium gluconate and one or more compounds from the group containing calcium formate and magnesium formate, preferably calcium formate.
In besonders vorteilhaften Ausführungsformen einer erfindungsgemäßen Lederhilfsmittelzusammensetzung beträgt das Verhältnis der Pseudoalkalimetall-, Alkalimetall-, und/oder Erdalkalimetallsalze der Zuckersäuren zu den Verbindungen aus der Gruppe enthaltend Erdalkalimetallformiate, Erdalkalimetallacetate, Erdalkalimetallpropionate, Monoethanolamin, Diethanolamin, Triethanolamin und Harnstoff in der Lederhilfsmittelzusammensetzung von 10:90 bis 90:10, vorzugsweise von 20:80 bis 80:20 und besonders bevorzugt von 30:70 bis 70:30 beträgt. Das Verhältnis bestimmt sich dabei als Quotient aus der Gesamtmasse der eingesetzten Verbindungen der obigen Salze der Zuckersäuren zu der Gesamtmasse der eingesetzten Verbindungen der obigen Formiate, Acetate und Propionate.In particularly advantageous embodiments of a leather auxiliary composition according to the invention, the ratio of the pseudoalkali metal, alkali metal and/or alkaline earth metal salts of sugar acids to the compounds from the group comprising alkaline earth metal formates, alkaline earth metal acetates, alkaline earth metal propionates, monoethanolamine, diethanolamine, triethanolamine and urea in the leather auxiliary composition is 10:90 to 90:10, preferably from 20:80 to 80:20 and more preferably from 30:70 to 70:30. The ratio is determined as the quotient of the total mass of the compounds used of the above salts of sugar acids to the total mass of the compounds used of the above formates, acetates and propionates.
Typischerweise sind die erfindungsgemäßen Lederhilfsmittelzusammensetzungen Schwellungsregulatoren, insbesondere Schwellungsregulatoren für die Wasserwerkstatt bevorzugt Schwellungsregulatoren zur Anwendung in der Weiche oder im Äscher, meist bevorzugt Schwellungsregulatoren zur Anwendung im Äscher.Typically, the leather auxiliary compositions according to the invention are swell regulators, in particular swell regulators for the water workshop, preferably swell regulators for use in soaking or liming, most preferably swell regulators for use in liming.
Die erfindungsgemäßen Lederhilfsmittelzusammensetzungen können in flüssiger oder in fester Form vorliegen. In einer bevorzugten Ausführungsform liegt die erfindungsgemäße Lederhilfsmittelzusammensetzung bei 25°C als Feststoff vor, idealerweise in partikulärer Form, wie zum Beispiel als Pulver, Granulat oder Pellets.The leather auxiliary compositions according to the invention can be in liquid or in solid form. In a preferred embodiment, the leather auxiliary composition according to the invention is in the form of a solid at 25° C., ideally in particulate form, such as, for example, powder, granules or pellets.
Die Screening-Versuche wurden auf Rohhautproben DIN A4 ausgeführt. Diese wurden aus dem Kernbereich einer gesalzenen Rohhaut geschnitten, so dass alle Proben eine ähnliche Faserstruktur aufwiesen. Die Proben einer Reihe wurden von der selben Haut entnommen da sich die Faserstruktur der Haut von Tier zu Tier unterscheidet. Die Probenkörper wurden einzeln gewogen. Auf dieses Gewicht (der Rohhaut-Salzgewicht) beziehen sich alle Prozentangaben der Prozess-Rezeptur.The screening tests were carried out on DIN A4 rawhide samples. These were cut from the core of a salted rawhide so that all samples had a similar fiber structure. The samples in a series were taken from the same hide as the fibrous structure of the hide differs from animal to animal. The specimens were weighed individually. All percentages in the process recipe refer to this weight (the rawhide salt weight).
Das Prüfverfahren umfasste die Prozessschritte "Weiche" und "Äscher". Die Mengen der in dem Prozess verwendeten Chemikalien und Produkte sowie die Wassermenge sind in Gewichtsprozent auf das Rohhaut-Salzgewicht der einzelnen Proben bezogen. Die Mengen wurden auf einer Waage mit der Genauigkeit von 0,5g abgewogen.The test procedure included the process steps "soaking" and "liming". The amounts of chemicals and products used in the process, as well as the amount of water, are percentages by weight based on the rawhide salt weight of each sample. The amounts were weighed on a scale with an accuracy of 0.5 g.
Die Versuche wurden in kleinen Versuchs-Gerbfässern, Durchmesser 300mm mit Temperaturregulierung (Hersteller Fa. Dose), durchgeführt. Die Prozesstemperatur wurde konstant auf 28°C +/- 1°C gehalten.The tests were carried out in small test tanning drums, diameter 300 mm with temperature control (manufacturer Dose). The process temperature was kept constant at 28°C +/- 1°C.
Der Probenkörper wurde einzeln in das Musterfass gegeben und 200% Wasser (bezogen auf das Salzgewicht) mit einer Temperatur von 28°C, und 0,3% Weichhilfsmittel Peltec BH (Mischung Tensid und Bakterizid der Fa. LANXESS Deutschland GmbH) zugegeben. Das Versuchsfass wurde 300 Minuten mit 10RPM rotiert. Danach wurde die Flotte (Prozess-Wasser) abgelassen. Der Probenkörper wurde nun abgetupft, gewogen und die durchschnittliche Dicke an vier Messpunkten ermittelt.The specimens were placed individually in the sample barrel and 200% water (based on the salt weight) at a temperature of 28° C. and 0.3% Peltec BH softening agent (mixture of surfactant and bactericide from LANXESS Deutschland GmbH) were added. The test barrel was rotated at 10 RPM for 300 minutes. The liquor (process water) was then drained. The specimen was then dabbed off, weighed and the average thickness determined at four measuring points.
Der Probenkörper wurde wieder in das Versuchsfass gegeben und 200% Wasser mit einer Temperatur von 28°C hinzugefügt und 15 min. rotiert. Danach wurde der restliche Salzgehalt der Flotte ermittelt. Dieser soll 3,5°Bé nicht übersteigen. Bei zu hohem Salzgehalt ist die Flotte einmal zu wechseln.The specimen was placed back into the test barrel and 200% water at a temperature of 28°C was added and rotated for 15 minutes. The remaining salt content of the liquor was then determined. This should not exceed 3.5°Bé. If the salt content is too high, the liquor must be changed once.
Der Schwellungsregulator wurde in die Flotte geben und das Versuchsfass 60 min. rotiert. Danach wurde gewogen und die durchschnittliche Dicke bestimmt. Der Probenkörper wurde zurück in die Flotte gegeben, 3% Kalk (Ca(OH)2) und 2,5% Na2S zugeben und für 4 Std. rotieren gelassen. Danach erfolgten 15 Std. Fassrotation im Intervallbetrieb (10min. rotieren/ 50 min. Pause). Anschließend wurde der pH-Wert der Flotte gemessen (pH 12-12,5), der Probenkörper entnommen, wieder gewogen und die durchschnittliche Dicke gemessen. Aus der Dickenzunahme wurde die Schwellung bestimmt.The swelling regulator was added to the liquor and the test barrel was rotated for 60 minutes. It was then weighed and the average thickness determined. The specimen was placed back in the float, 3% lime (Ca(OH) 2 ) and 2.5% Na 2 S added and rotated for 4 hours. This was followed by 15 hours of drum rotation at intervals (rotate 10 minutes/pause 50 minutes). The pH of the liquor was then measured (pH 12-12.5), the specimen is removed, weighed again and the average thickness measured. The swelling was determined from the increase in thickness.
Die Probenkörper wurden anschließend gewaschen und mit einer Standard Chromgerbung (wie beispielsweise beschrieben in
Die Ergebnisse der Schwellungsmessung und der Beurteilung der Festnarbigkeit sind in Tabelle 1 aufgeführt.The results of the swelling measurement and the assessment of the tightness of the scar are listed in Table 1.
Die Ergebnisse belegen, dass die erfindungsgemäße Verwendung von Salzen der Zuckersäuren es erlaubt, auf die Verwendung stickstoffhaltiger Verbindungen, wie Harnstoff oder Ethanolamine, zu verzichten, wodurch der Stickstoff-Eintrag in das Abwasser wesentlich reduziert werden kann, aber gleichzeitig die Festnarbigkeit beibehalten oder verbessert werden kann. Zudem geht aus den Ergebnissen hervor, dass bei der erfindungsgemäßen Verwendung von Salzen der Zuckersäuren zusammen mit stickstoffhaltigen Verbindungen wie Harnstoff oder Ethanolaminen, d.h. bei gleichbleibendem Stickstoff-Eintrag in das Abwasser, eine wesentliche Verbesserung der Festnarbigkeit erzielt werden kann.
Claims (14)
- Use of pseudo-alkali metal salts, alkali metal salts and/or alkaline earth metal salts of the sugar acids in leathermaking in soaking, in liming or in soaking and in liming.
- Use according to Claim 1, where compounds selected from the group of ammonium, sodium, potassium, calcium and magnesium salts of the sugar acids, preferably sodium and potassium salts of the sugar acids, more preferably sodium salts of the sugar acids, are employed.
- Use according to either or both of Claims 1 and 2, where salts of aldonic acids, uronic acids, aldaric acids or ketoaldonic acids, preferably of aldonic acids and more preferably of gluconic acid, are employed.
- Use according to one or more of Claims 1 to 3, where ammonium, sodium and/or potassium gluconate, preferably sodium and/or potassium gluconate and more preferably sodium gluconate, is employed.
- Use according to one or more of Claims 1 to 4 as a swelling regulator in liming.
- Use according to one or more of Claims 1 to 5, where the use takes place together with alkaline earth metal salts of C1-C3 carboxylic acids, preferably magnesium salts and/or calcium salts of formic, acetic or propionic acid, more preferably magnesium salts and/or calcium salts of formic acid, and most preferably with calcium formate.
- Use according to one or more of Claims 1 to 6, where the use takes place together with monoethanolamine, diethanolamine, triethanolamine or urea.
- Use according to one or more of Claims 1 to 7, where, based on the salt weight of the untreated hide employed, defined as the weight possessed by the hide after preservation with salt, at a moisture content of 35 wt%, from 0.05 to 5.0 wt%, preferably from 0.1 to 2.0 wt% and more preferably from 0.2 to 1.0 wt%, of pseudo-alkali metal salts, alkali metal salts and/or alkaline earth metal salts of the sugar acids are used.
- Method for treating animal hides in liming using pseudo-alkali metal salts, alkali metal salts and/or alkaline earth metal salts of the sugar acids, according to one or more of Claims 1 to 8, where the pseudo-alkali metal salts, alkali metal salts and/or alkaline earth metal salts of the sugar acids are added to the liquor in which the hides are treated.
- Method for producing leather, comprising the treatment according to Claim 9.
- Leather assistant composition comprising one or more pseudo-alkali metal salts, alkali metal salts and/or alkaline earth metal salts of sugar acids, further comprising one or more compounds from the group containing alkaline earth metal salts of C1-C3 carboxylic acids, monoethanolamine, diethanolamine, triethanolamine and urea, preferably magnesium and/or calcium salts of formic, acetic or propionic acid, monoethanolamine, diethanolamine, triethanolamine and urea, more preferably magnesium and/or calcium salts of formic or acetic acid, and most preferably calcium formate.
- Leather assistant composition according to Claim 11, in which the pseudo-alkali metal salts, alkali metal salts and/or alkaline earth metal salts of the sugar acids are ammonium, sodium and/or potassium salts of the sugar acids, more preferably sodium salts of the sugar acids; and/or comprising one or more pseudo-alkali metal salts, alkali metal salts and/or alkaline earth metal salts of gluconic acid, preferably ammonium, sodium and/or potassium gluconate, more preferably sodium gluconate.
- Leather assistant composition according to either or both of Claims 11 and 12, comprising sodium gluconate and one or more compounds from the group containing calcium formate and magnesium formate, preferably calcium formate.
- Leather assistant composition according to either or both of Claims 11 and 13, where the ratio of the pseudo-alkali metal salts, alkali metal salts and/or alkaline earth metal salts of the sugar acids to the compounds from the group containing alkaline earth metal formates, alkaline earth metal acetates, alkaline earth metal propionates, monoethanolamine, diethanolamine, triethanolamine and urea is from 10:90 to 90:10, preferably from 20:80 to 80:20 and more preferably from 30:70 to 70:30.
Applications Claiming Priority (2)
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EP18215380.9A EP3670675A1 (en) | 2018-12-21 | 2018-12-21 | Leather agents for beamhouse |
PCT/EP2019/085260 WO2020126987A1 (en) | 2018-12-21 | 2019-12-16 | Leather auxiliaries for the beamhouse |
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EP3924523A1 EP3924523A1 (en) | 2021-12-22 |
EP3924523B1 true EP3924523B1 (en) | 2023-08-09 |
EP3924523C0 EP3924523C0 (en) | 2023-08-09 |
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EP18215380.9A Withdrawn EP3670675A1 (en) | 2018-12-21 | 2018-12-21 | Leather agents for beamhouse |
EP19828654.4A Active EP3924523B1 (en) | 2018-12-21 | 2019-12-16 | Leather agents for beamhouse |
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CN (1) | CN113227407B (en) |
AR (1) | AR117464A1 (en) |
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NL2027083B1 (en) | 2020-12-09 | 2022-07-07 | Stahl Int B V | Process for deliming of hides, skins or pelts |
NL2031083B1 (en) | 2022-02-25 | 2023-09-07 | Stahl Int B V | Process for liming of hides, skins or pelts |
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CH647259A5 (en) * | 1980-04-29 | 1985-01-15 | Sandoz Ag | METHOD FOR TANNING ANIMAL SKIN AND SKIN WITH IRON SALT. |
GB8802747D0 (en) * | 1988-02-06 | 1988-03-09 | Tioxide Group Plc | Tanning agent & process |
DE10249077A1 (en) * | 2002-10-21 | 2004-04-29 | Basf Ag | Process for the production of leather |
CN1676614A (en) * | 2005-04-07 | 2005-10-05 | 张壮斗 | New-type adjuvant for leather production |
EP2257650A1 (en) * | 2008-03-20 | 2010-12-08 | Basf Se | Method for manufacturing leather |
EP2607499A3 (en) * | 2013-02-14 | 2013-07-10 | Basf Se | Method for producing leather |
CN107653350A (en) * | 2017-09-27 | 2018-02-02 | 徐州双辰服饰有限公司 | A kind of leather dye agent prescription |
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2018
- 2018-12-21 EP EP18215380.9A patent/EP3670675A1/en not_active Withdrawn
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- 2019-12-16 WO PCT/EP2019/085260 patent/WO2020126987A1/en unknown
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EP3924523A1 (en) | 2021-12-22 |
EP3670675A1 (en) | 2020-06-24 |
BR112021011977A8 (en) | 2023-05-09 |
CN113227407B (en) | 2023-08-11 |
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AR117464A1 (en) | 2021-08-11 |
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