US291784A - Augustus schultz - Google Patents
Augustus schultz Download PDFInfo
- Publication number
- US291784A US291784A US291784DA US291784A US 291784 A US291784 A US 291784A US 291784D A US291784D A US 291784DA US 291784 A US291784 A US 291784A
- Authority
- US
- United States
- Prior art keywords
- solution
- skins
- hides
- bichromate
- augustus
- 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.)
- Expired - Lifetime
Links
- 239000000243 solution Substances 0.000 description 54
- 210000003491 Skin Anatomy 0.000 description 32
- 238000000034 method Methods 0.000 description 22
- 239000010985 leather Substances 0.000 description 16
- SOCTUWSJJQCPFX-UHFFFAOYSA-N dichromate(2-) Chemical compound [O-][Cr](=O)(=O)O[Cr]([O-])(=O)=O SOCTUWSJJQCPFX-UHFFFAOYSA-N 0.000 description 12
- 239000002253 acid Substances 0.000 description 10
- BVKZGUZCCUSVTD-UHFFFAOYSA-N Carbonic acid Chemical compound OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 description 8
- VEXZGXHMUGYJMC-UHFFFAOYSA-N HCl Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 8
- KMUONIBRACKNSN-UHFFFAOYSA-N Potassium dichromate Chemical compound [K+].[K+].[O-][Cr](=O)(=O)O[Cr]([O-])(=O)=O KMUONIBRACKNSN-UHFFFAOYSA-N 0.000 description 8
- AKHNMLFCWUSKQB-UHFFFAOYSA-L Sodium thiosulphate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=S AKHNMLFCWUSKQB-UHFFFAOYSA-L 0.000 description 6
- 235000019345 sodium thiosulphate Nutrition 0.000 description 6
- VXMKYRQZQXVKGB-CWWHNZPOSA-N Tannin Chemical compound O([C@H]1[C@H]([C@@H]2OC(=O)C3=CC(O)=C(O)C(O)=C3C3=C(O)C(O)=C(O)C=C3C(=O)O[C@H]([C@H]2O)O1)O)C(=O)C1=CC(O)=C(O)C(O)=C1 VXMKYRQZQXVKGB-CWWHNZPOSA-N 0.000 description 4
- 239000003086 colorant Substances 0.000 description 4
- 150000001875 compounds Chemical class 0.000 description 4
- 150000003839 salts Chemical class 0.000 description 4
- 239000011780 sodium chloride Substances 0.000 description 4
- 235000018553 tannin Nutrition 0.000 description 4
- 229920001864 tannin Polymers 0.000 description 4
- 239000001648 tannin Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 239000001828 Gelatine Substances 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 238000004040 coloring Methods 0.000 description 2
- GRWZHXKQBITJKP-UHFFFAOYSA-L dithionite(2-) Chemical compound [O-]S(=O)S([O-])=O GRWZHXKQBITJKP-UHFFFAOYSA-L 0.000 description 2
- 238000004043 dyeing Methods 0.000 description 2
- 230000002349 favourable Effects 0.000 description 2
- 229920000159 gelatin Polymers 0.000 description 2
- 235000019322 gelatine Nutrition 0.000 description 2
- 230000000266 injurious Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229940072033 potash Drugs 0.000 description 2
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Substances [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 description 2
- 235000015320 potassium carbonate Nutrition 0.000 description 2
- KWYUFKZDYYNOTN-UHFFFAOYSA-M potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 2
- 238000002791 soaking Methods 0.000 description 2
- 239000001117 sulphuric acid Substances 0.000 description 2
- 235000011149 sulphuric acid Nutrition 0.000 description 2
- DHCDFWKWKRSZHF-UHFFFAOYSA-L thiosulfate(2-) Chemical compound [O-]S([S-])(=O)=O DHCDFWKWKRSZHF-UHFFFAOYSA-L 0.000 description 2
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
- C14C3/00—Tanning; Compositions for tanning
- C14C3/02—Chemical tanning
- C14C3/04—Mineral tanning
- C14C3/06—Mineral tanning using chromium compounds
Definitions
- This invention relates to a new process for tawing hides or skins, said process consisting in subjecting said hides or skins to the action of compounds of metallic saltssuch as bichromate of potashaud then treating the same with hyposulphite of soda, by which term is understood.
- metallic salts such as bichromate of potashaud
- hyposulphite of soda by which term is understood.
- the skins are completed ifsinall pieces cut from the thickest parts of said skin show that the solution has entirely penetrated.
- the skins are then ready to be taken out, and after the adhering liquor has run off the skins are introduced into the second solution, which consists of hyposulphite of soda dissolved in water, and adding an acid, such as hydrochloric acid.
- the solution may be strong or weak of hyposulphite, and the quantity of acid used at first may be less than requisite to split up the entire quantity of hyposulindicated by the color of the skins.
- the coloring can be done after the skins leave the hyposulphite solution, and after they have been exposed for the second time to the bichromate solution.
- the leather coming from the hyposulphite solution is especially adapted for'light or dark colors, and by proper dyeing methods better and brighter colors can be produced than on leather done by tanning. Aft-er the leather is treated in the manner above indicated, it may be colored, soaped, and greased in the usual way.
- Leather can also be made by reversing the operation and first soaking the hides in a solution of hyposulphite of soda and then exposing them to. the action of the bichromate solution.
- the process will be done in a shorter time than if the solutions are used cold.
- the gelatine contained infthe hides is rendered insoluble by means not injurious to the leather. If leather made by tannin is put in a strong soda solution, the tannin is extracted and a dark-brown liquor is formed. If leather made by my process is put in a strong soda solution, the liquor obtained shows only a little milky color.
- hyposul- 5 phurous acid or as it is otherwise called thio- AUGUSTUS SCHUL 1 sulphuric acid,
- hypo- ⁇ Vitnesses snlphite of soda or of potash in the presence of hydrochloric acid.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Treatment And Processing Of Natural Fur Or Leather (AREA)
Description
.without the addition of an acid.
AUGUSTUS SCHULTZ, OF NEIV YORK, N. Y.
TAWlNG HIDES AND SKiNS.
SPECIFICATION forming part oi Letters Patent No. 291,784, dated January 8, 1884.
Application filed May 31, 1883. (No speclmens.)
To all whom it may concern Be it known that I, AUGUSTUS ScnUL'rz, a citizen of the United States, residing at New York, in the county and State of New York, have invented a new Improved Process of Tawing Hides and Skins, of which the following is a specification.
This invention relates to a new process for tawing hides or skins, said process consisting in subjecting said hides or skins to the action of compounds of metallic saltssuch as bichromate of potashaud then treating the same with hyposulphite of soda, by which term is understood. that salt which is more recently sometimes called thiosulphate of soda, (Na,S ,O,.)
In carrying out my process, I .unhair the rawhides and prepare them in the same manner in which they are made ready for tanning. If the hides have not been pickled, I subject them to the action of a solution of bichromate of potash in the presence of an acid-such as hydrochloric acidor, if the hides have been pickled, they may be treated in a solution of bichromate of potash in water In this solu tion the hides are left for a shorter or longer time, according to their thickness and to the strength of the solution employed. A skiver or the face of a sheep-skin can be done in a strong solution, as above described, in about fifteen minutes, 'while a full skin roan would require in the same solution about one hour. I call the solution weakif it contains five per cent. or less of the weight of skins of bichromate of potash, and I call the solution strong it it contains more than five per cent. of bichromate of potash. It is not material, however, how strong the solution is. The skins are completed ifsinall pieces cut from the thickest parts of said skin show that the solution has entirely penetrated. The skins are then ready to be taken out, and after the adhering liquor has run off the skins are introduced into the second solution, which consists of hyposulphite of soda dissolved in water, and adding an acid, such as hydrochloric acid. The solution may be strong or weak of hyposulphite, and the quantity of acid used at first may be less than requisite to split up the entire quantity of hyposulindicated by the color of the skins.
phite, and more acid may be added if the skins show that more is required, which is hen they are done, they show a whitish, blueish, or greenish color, according to the time they are kept in the hyposulphite solution. A skiver which first has been exposed to the action of the bichromate for fifteen minutes will be ready by remaining in the hyposulphite solution about twenty minutes. For thicker skins a proportionately longer time is required. For some skins-such as calf or steers skinsit is desirable that the same, after having been withdrawn from the second or hydrosulphite solution, shall be returned to the bichromate solution, which imparts to them a brownish color and leaves them in a favorable condition to be colored black. The coloring can be done after the skins leave the hyposulphite solution, and after they have been exposed for the second time to the bichromate solution. The leather coming from the hyposulphite solution is especially adapted for'light or dark colors, and by proper dyeing methods better and brighter colors can be produced than on leather done by tanning. Aft-er the leather is treated in the manner above indicated, it may be colored, soaped, and greased in the usual way. Leather can also be made by reversing the operation and first soaking the hides in a solution of hyposulphite of soda and then exposing them to. the action of the bichromate solution. By using the solutions indicated at a heat of about 80 Fahrenheit, the process will be done in a shorter time than if the solutions are used cold. By my process the gelatine contained infthe hides is rendered insoluble by means not injurious to the leather. If leather made by tannin is put in a strong soda solution, the tannin is extracted and a dark-brown liquor is formed. If leather made by my process is put in a strong soda solution, the liquor obtained shows only a little milky color.
Leather made by my process is very strong, soft, elastic, and my process is applicable to hides or skins of every description.
\Vhat I claim as new, and desire to secure by Letters Patent, is
The within-described process for tawing hides and skins, said process consisting in sub- IOO j ecting the hides or skins to the action of com- In testimony whereof Ihave hereunto set my pounds of metallic salts such as a solution of hand and seal in the presence of two subscrib-' I bichromate of potash-and then treating the ing witnesses.
same with a compound containing hyposul- 5 phurous acid, (or as it is otherwise called thio- AUGUSTUS SCHUL 1 sulphuric acid,) such as a solution of hypo- \Vitnesses: snlphite of soda or of potash in the presence of hydrochloric acid.
W. HAUFF, XVILLIAM MILLER.
Publications (1)
Publication Number | Publication Date |
---|---|
US291784A true US291784A (en) | 1884-01-08 |
Family
ID=2360971
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US291784D Expired - Lifetime US291784A (en) | Augustus schultz |
Country Status (1)
Country | Link |
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US (1) | US291784A (en) |
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0
- US US291784D patent/US291784A/en not_active Expired - Lifetime
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