GB426006A - Improvements in the manufacture and production of synthetic tanning agents - Google Patents

Improvements in the manufacture and production of synthetic tanning agents

Info

Publication number
GB426006A
GB426006A GB2766333A GB2766333A GB426006A GB 426006 A GB426006 A GB 426006A GB 2766333 A GB2766333 A GB 2766333A GB 2766333 A GB2766333 A GB 2766333A GB 426006 A GB426006 A GB 426006A
Authority
GB
United Kingdom
Prior art keywords
formaldehyde
manufacture
dioxydiphenylsulphones
dioxydiphenylsulphone
tanning agents
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
GB2766333A
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.)
IG Farbenindustrie AG
Original Assignee
IG Farbenindustrie AG
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 IG Farbenindustrie AG filed Critical IG Farbenindustrie AG
Priority to GB2766333A priority Critical patent/GB426006A/en
Publication of GB426006A publication Critical patent/GB426006A/en
Priority to GB3172536A priority patent/GB481308A/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
    • C14C3/08—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

Products useful as tanning - agents are obtained by treating dioxydiphenylsulphones with water-soluble salts of sulphurous acid and with formaldehyde or reagents yielding formaldehyde. The reaction may be effected in an aqueous medium at a temperature above 100 DEG C. under pressure. Examples are given describing the manufacture of tanning agents by heating 4 : 4<1>-dioxydiphenylsulphone with various proportions of aqueous formaldehyde and sodium sulphite. Other specified starting materials are 4 : 4<1> - dioxy - 3 : 3<1> - dimethyldiphenylsulphone, 2 : 2<1> - dioxydiphenylsulphone, and halogenated dioxydiphenylsulphones. Trioxymethylene is mentioned as a substitute for formaldehyde. Potassium or ammonium sulphite may be used instead of sodium sulphite. Specification 425,037 is referred to.
GB2766333A 1933-10-07 1933-10-07 Improvements in the manufacture and production of synthetic tanning agents Expired GB426006A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB2766333A GB426006A (en) 1933-10-07 1933-10-07 Improvements in the manufacture and production of synthetic tanning agents
GB3172536A GB481308A (en) 1933-10-07 1936-11-19 Improvements in the manufacture and production of tanning agents

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2766333A GB426006A (en) 1933-10-07 1933-10-07 Improvements in the manufacture and production of synthetic tanning agents

Publications (1)

Publication Number Publication Date
GB426006A true GB426006A (en) 1935-03-26

Family

ID=10263236

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2766333A Expired GB426006A (en) 1933-10-07 1933-10-07 Improvements in the manufacture and production of synthetic tanning agents

Country Status (1)

Country Link
GB (1) GB426006A (en)

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