GB397672A - Process for tanning animal hides - Google Patents

Process for tanning animal hides

Info

Publication number
GB397672A
GB397672A GB23726/32A GB2372632A GB397672A GB 397672 A GB397672 A GB 397672A GB 23726/32 A GB23726/32 A GB 23726/32A GB 2372632 A GB2372632 A GB 2372632A GB 397672 A GB397672 A GB 397672A
Authority
GB
United Kingdom
Prior art keywords
dioxydiphenylsulphone
formaldehyde
condensed
sulphonic acid
acid
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
GB23726/32A
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.)
Novartis AG
National Starch and Chemical Investment Holding Corp
Original Assignee
JR Geigy AG
National Starch and Chemical Investment Holding Corp
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 JR Geigy AG, National Starch and Chemical Investment Holding Corp filed Critical JR Geigy AG
Publication of GB397672A publication Critical patent/GB397672A/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)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

Tanning-agents are prepared by condensing a non-sulphonated dioxydiphenylsulphone with an aromatic sulphonic acid and formaldehyde or sulphur chloride. Among the sulphonic acids which are particularly suitable are those of substituted phenol ethyl ethers such as are obtained by etherifying phenol with glycol chlorhydrin or ethylene dichlorides. According to the examples: (1) Naphthalene sulphonic acid is condensed with dioxydiphenylsulphone and formaldehyde; (2) tetrahydronaphthalene sulphonic acid is condensed with dioxydiphenylsulphone and formaldehyde; (3) the product obtained by sulphonating diphenylglycol ether with 93 per cent sulphuric acid is condensed with dioxydiphenylsulphone and formaldehyde; (4) the product obtained by sulphonating monophenyl glycol ether with 95 per cent sulphuric acid is condensed with dioxydiphenylsulphone and formaldehyde; (5) naphthalene sulphonic acid and dioxydiphenylsulphone are condensed with sulphur chloride. Specification 375,160 is referred to.
GB23726/32A 1931-09-05 1932-08-24 Process for tanning animal hides Expired GB397672A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE397672X 1931-09-05

Publications (1)

Publication Number Publication Date
GB397672A true GB397672A (en) 1933-08-31

Family

ID=6397238

Family Applications (1)

Application Number Title Priority Date Filing Date
GB23726/32A Expired GB397672A (en) 1931-09-05 1932-08-24 Process for tanning animal hides

Country Status (1)

Country Link
GB (1) GB397672A (en)

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