GB444690A - Improvements in or relating to the tanning of hides and skins - Google Patents
Improvements in or relating to the tanning of hides and skinsInfo
- Publication number
- GB444690A GB444690A GB27464/34A GB2746434A GB444690A GB 444690 A GB444690 A GB 444690A GB 27464/34 A GB27464/34 A GB 27464/34A GB 2746434 A GB2746434 A GB 2746434A GB 444690 A GB444690 A GB 444690A
- Authority
- GB
- United Kingdom
- Prior art keywords
- tanning
- sulphate
- substance
- chrome
- added
- 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
- C14C3/04—Mineral tanning
- C14C3/06—Mineral tanning using chromium compounds
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
444,690. Making leather. TANNING PROCESS CO., 140, Federal Street, Boston, U.S.A.-(Assignees of Merritt, M. M. ; Middleton, Massachusetts, U.S.A.) Sept. 25, 1934, No. 27464. Convention date, Oct. 2, 1933. [Class 76] A process of chrome tanning consists in treating the hide with a soluble chrome tanning substance, a soluble chrome substance not in itself tanning, and with a substance (in particular sodium sulphate), adapted to increase the tanning effect and subsequently treating, the hide with a reducing agent to render the non-self tanning chrome substance effective. A suitable tanning bath may be prepared by mixing in aqueous solution basic chromic sulphate, sodium dichromate and sulphuric acid in sufficient quantity to produce normal chromic sulphate, and to convert part of the dichromate into sodium sulphate and chromic acid. After treatment for say half an hour part of the liquor is drawn off and a reducing agent, e.g. sodium thiosulphate, is added. When chromium salts other than the sulphate are used sodium sulphate is added to produce the increased tanning effect referred to. The tanning materials may be added to the tanning bath in canvas bags. Specification 12849 /93, [Class 76], is referred to.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US779134XA | 1933-10-02 | 1933-10-02 | |
US444690XA | 1933-10-02 | 1933-10-02 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB444690A true GB444690A (en) | 1936-03-25 |
Family
ID=60201767
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB27464/34A Expired GB444690A (en) | 1933-10-02 | 1934-09-25 | Improvements in or relating to the tanning of hides and skins |
Country Status (2)
Country | Link |
---|---|
FR (1) | FR779134A (en) |
GB (1) | GB444690A (en) |
-
1934
- 1934-09-25 GB GB27464/34A patent/GB444690A/en not_active Expired
- 1934-10-01 FR FR779134D patent/FR779134A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
FR779134A (en) | 1935-03-29 |
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