GB291245A - Improvements in the manufacture and production of tanning agents - Google Patents
Improvements in the manufacture and production of tanning agentsInfo
- Publication number
- GB291245A GB291245A GB1625427A GB1625427A GB291245A GB 291245 A GB291245 A GB 291245A GB 1625427 A GB1625427 A GB 1625427A GB 1625427 A GB1625427 A GB 1625427A GB 291245 A GB291245 A GB 291245A
- Authority
- GB
- United Kingdom
- Prior art keywords
- tanning
- formaldehyde
- solution
- agents
- sulphur
- 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
291,245. Johnson, J. Y., (I. G. Farbenindustrie Akt.-Ges.). June 18, 1927. Tanning with special chemicals; combination tanning processes.-Tanning agents are obtained by condensing with sulphur, under alkaline conditions, the water-soluble condensation products obtainable from formaldehyde and phenol, or its homologues or halogen derivatives, and sulphites. In one example, phenol, formaldehyde, and a solution of sodium sulphite are heated under reflux until a sample remains clear after acidification, whereupon sulphur is added and the mixture boiled until hydrogen sulphide is no longer evolved. For use in tanning, the solution is acidified and boiled to remove sulphurous acid. In another example there is condensed with sulphur, a condensation product obtained from a solution of m-cresol in caustic soda, formaldehyde, and a solution of sodium bisulphite, and in a further example the primary condensation product is obtained from p-chlorphenol, formaldehyde, and sodium sulphite. The products may be used in admixture with other tanning agents, whether natural or synthetic, or other substances used in tanning, in which connection reference is made to clarifying agents, such as oxalic acid, and weighting agents, such as sugar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1625427A GB291245A (en) | 1927-06-18 | 1927-06-18 | Improvements in the manufacture and production of tanning agents |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1625427A GB291245A (en) | 1927-06-18 | 1927-06-18 | Improvements in the manufacture and production of tanning agents |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB291245A true GB291245A (en) | 1928-05-31 |
Family
ID=10073990
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1625427A Expired GB291245A (en) | 1927-06-18 | 1927-06-18 | Improvements in the manufacture and production of tanning agents |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB291245A (en) |
-
1927
- 1927-06-18 GB GB1625427A patent/GB291245A/en not_active Expired
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