GB362797A - Improvements relating to tanning substances - Google Patents
Improvements relating to tanning substancesInfo
- Publication number
- GB362797A GB362797A GB7386/31A GB738631A GB362797A GB 362797 A GB362797 A GB 362797A GB 7386/31 A GB7386/31 A GB 7386/31A GB 738631 A GB738631 A GB 738631A GB 362797 A GB362797 A GB 362797A
- Authority
- GB
- United Kingdom
- Prior art keywords
- acid
- formaldehyde
- urea
- diluted
- cooled
- 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
Links
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
- C14C3/08—Chemical tanning by organic agents
- C14C3/18—Chemical tanning by organic agents using polycondensation products or precursors thereof
- C14C3/20—Chemical tanning by organic agents using polycondensation products or precursors thereof sulfonated
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)
Abstract
A sulphonated phenol (or a sulphonated phenol derivative) is condensed with formaldehyde (or a compound which yields formaldehyde) at a raised temperature and in strongly acid solution in the presence of one or more aromatic oxycarboxylic acids and urea (or a compound which yields urea). The neutralized products show the general reactions of tanning substances, and can be used alone or in combination with other tanning agents; silk can be loaded by means of the products without change of colour. According to the examples, (1) crude cresol and sulphuric acid are heated at 105 DEG C., diluted, cooled to 50 DEG C., and treated with gallic acid, urea, and formaldehyde solution with further heating; the acidity of the product is reduced by addition of caustic soda; (2) as in example 1, using salicylic acid instead of gallic acid; (3) phenol and sulphuric acid are heated to 110 DEG C., diluted, cooled to 40-50 DEG C., and treated with o-cresotinic acid and a filtrate obtained from calcium cyanamide and water; formaldehyde solution is then added, the temperature is raised to 90-95 DEG C., and the mixture finally neutralized with ammonia; (4) as in example 2, except that methylal is used instead of formaldehyde, and the reaction product is salted out with common salt and sodium carbonate, separated, and dried; (5) as in example 1, except that salicylic acid is used instead of cresol.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE362797X | 1930-03-10 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB362797A true GB362797A (en) | 1931-12-10 |
Family
ID=6307631
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB7386/31A Expired GB362797A (en) | 1930-03-10 | 1931-03-10 | Improvements relating to tanning substances |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB362797A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2007131813A1 (en) | 2006-05-17 | 2007-11-22 | Basf Se | Condensation products, method for their production and use thereof in medicaments, as disinfectants or as a tannin |
WO2009062932A1 (en) | 2007-11-14 | 2009-05-22 | Basf Se | Condensation products based on bicyclic or polycyclic aromatic or heteroaromatic compounds |
CN101489568B (en) * | 2006-05-17 | 2013-07-10 | 巴斯夫欧洲公司 | Condensation products, method for their production and use thereof in medicaments, as disinfectants or as a tannin |
-
1931
- 1931-03-10 GB GB7386/31A patent/GB362797A/en not_active Expired
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2007131813A1 (en) | 2006-05-17 | 2007-11-22 | Basf Se | Condensation products, method for their production and use thereof in medicaments, as disinfectants or as a tannin |
CN101489568B (en) * | 2006-05-17 | 2013-07-10 | 巴斯夫欧洲公司 | Condensation products, method for their production and use thereof in medicaments, as disinfectants or as a tannin |
WO2009062932A1 (en) | 2007-11-14 | 2009-05-22 | Basf Se | Condensation products based on bicyclic or polycyclic aromatic or heteroaromatic compounds |
US8945610B2 (en) | 2007-11-14 | 2015-02-03 | Basf Se | Condensation products based on bicyclic or polycyclic aromatics or heteroaromatics |
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