GB444690A - Improvements in or relating to the tanning of hides and skins - Google Patents

Improvements in or relating to the tanning of hides and skins

Info

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
Application number
GB27464/34A
Inventor
Matthew Melville Merritt
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TANNING PROCESS CO
Original Assignee
TANNING PROCESS CO
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by TANNING PROCESS CO filed Critical TANNING PROCESS CO
Publication of GB444690A publication Critical patent/GB444690A/en
Expired legal-status Critical Current

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.
GB27464/34A 1933-10-02 1934-09-25 Improvements in or relating to the tanning of hides and skins Expired GB444690A (en)

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)

Also Published As

Publication number Publication date
FR779134A (en) 1935-03-29

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