GB148897A - Manufacture of tanning agents - Google Patents
Manufacture of tanning agentsInfo
- Publication number
- GB148897A GB148897A GB2072020A GB2072020A GB148897A GB 148897 A GB148897 A GB 148897A GB 2072020 A GB2072020 A GB 2072020A GB 2072020 A GB2072020 A GB 2072020A GB 148897 A GB148897 A GB 148897A
- Authority
- GB
- United Kingdom
- Prior art keywords
- tanning
- formaldehyde
- heated
- tannin
- mixture
- 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
- C14C3/10—Vegetable tanning
- C14C3/12—Vegetable tanning using purified or modified vegetable tanning 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)
- Medicines Containing Plant Substances (AREA)
Abstract
Synthetic tanning-agents are prepared by condensing a vegetable tanning agent with a sulphonic acid of an aromatic hydrocarbon or phenol or a salt thereof and formaldehyde, or by first condensing the sulphonic acid or its salt with formaldehyde and then condensing the product with the vegetable tanning agent and formaldehyde. According to examples:-a mixture of phenol sulphonic acids and tannin is heated with formaldehyde solution; a mixture of barium cresol sulphonate and tannin is heated with formaldehyde solution and the product acidified; a mixture of naphthalene sulphonic acid and tannin is heated with formaldehyde solution; a mixture of naphthalene and phenol is heated with sulphuric acid, the product is condensed with formaldehyde, and the resulting tanning-agent further heated with tannin and formaldehyde solution; coal-tar phenols of boiling-point 185-200 DEG C. are heated with sodium sulphite and formaldehyde solution, then quebracho extract and formaldehyde solution are added and the mixture further heated. The products may be used in tanning alone or mixed with other tanning-agents or in combined tanning processes using both vegetable and mineral tanning-agents. Tannin derivatives.-The Specification as open to inspection under Sect. 91 (3) (a) describes also the preparation of a tanning-agent by heating a mixture of glucose and tannin 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 |
|---|---|---|---|
| DE148897X | 1916-08-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB148897A true GB148897A (en) | 1922-01-10 |
Family
ID=5673035
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2072020A Expired GB148897A (en) | 1916-08-17 | 1920-07-10 | Manufacture of tanning agents |
Country Status (2)
| Country | Link |
|---|---|
| CH (1) | CH93586A (en) |
| GB (1) | GB148897A (en) |
-
1920
- 1920-07-10 GB GB2072020A patent/GB148897A/en not_active Expired
-
1921
- 1921-01-24 CH CH93586D patent/CH93586A/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| CH93586A (en) | 1922-03-16 |
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