GB148126A - Manufacture of tanning agents and the application thereof - Google Patents
Manufacture of tanning agents and the application thereofInfo
- Publication number
- GB148126A GB148126A GB2002720A GB2002720A GB148126A GB 148126 A GB148126 A GB 148126A GB 2002720 A GB2002720 A GB 2002720A GB 2002720 A GB2002720 A GB 2002720A GB 148126 A GB148126 A GB 148126A
- Authority
- GB
- United Kingdom
- Prior art keywords
- agents
- tanning
- acid
- mixture
- phenol
- 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
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
Synthetic tanning-agents are prepared by coupling by means of an appropriate atom or group two different aromatic compounds, (1) an aromatic oxy-compound, or metallic salt thereof, capable of being coupled with a diazo compound, and (2) a sulphonic acid of an aromatic hydrocarbon, or a metallic salt thereof. If necessary, the product is solubilized by introducing sulphonic acid groups during or after the coupling. According to examples:-phenol is heated with sulphuric acid, then naphthalene sulphonic acid and phosphorus peutoxide are added and the mixture heated further; crude cresol is sulphonated by sulphuric acid, anthracene-2-sulphonic acid is added, and then sulphur chloride, and the mixture heated; sulphur chloride is added to a mixture of phenol and naphthalene sulphonic acids and the mass heated with sulphuric acid. The products are worked up by dissolving in water, filtering, and partially neutralizing with alkali. Other condensing or coupling agents may be used, and other sulphonating agents, such as chlorsulphonic acid, sodium sulphite or bisulphite or formaldehyde bisulphite. The products are used in tanning either alone or mixed with vegetable or mineral tanning-agents. The Specification as open to inspection under Sect. 91 (3) (a) describes also the preparation of a tanning-agent by heating a mixture of sodium phenol-p-sulphonate and sodium 1-naphthylamine-6-sulphonate with formaldehyde solution; this subject-matter does not appear in the Specification as accepted.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE528803X | 1916-07-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB148126A true GB148126A (en) | 1921-12-09 |
Family
ID=6553814
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2002720A Expired GB148126A (en) | 1916-07-20 | 1920-07-09 | Manufacture of tanning agents and the application thereof |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB148126A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5360453A (en) * | 1992-01-28 | 1994-11-01 | Ciba-Geigy Corporation | Process for pickling and pretanning raw hides |
-
1920
- 1920-07-09 GB GB2002720A patent/GB148126A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5360453A (en) * | 1992-01-28 | 1994-11-01 | Ciba-Geigy Corporation | Process for pickling and pretanning raw hides |
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