GB148126A - Manufacture of tanning agents and the application thereof - Google Patents

Manufacture of tanning agents and the application thereof

Info

Publication number
GB148126A
GB148126A GB2002720A GB2002720A GB148126A GB 148126 A GB148126 A GB 148126A GB 2002720 A GB2002720 A GB 2002720A GB 2002720 A GB2002720 A GB 2002720A GB 148126 A GB148126 A GB 148126A
Authority
GB
United Kingdom
Prior art keywords
agents
tanning
acid
mixture
phenol
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
GB2002720A
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.)
CHEMISCHE FABRIKEN WORMS AG
Original Assignee
CHEMISCHE FABRIKEN WORMS 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 CHEMISCHE FABRIKEN WORMS AG filed Critical CHEMISCHE FABRIKEN WORMS AG
Publication of GB148126A publication Critical patent/GB148126A/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

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

Synthetic tanning-agents are prepared by coupling by means of an appropriate atom or group two different aromatic compounds, (1) an aromatic oxy-compound, or metallic salt thereof, capable of being coupled with a diazo compound, and (2) a sulphonic acid of an aromatic hydrocarbon, or a metallic salt thereof. If necessary, the product is solubilized by introducing sulphonic acid groups during or after the coupling. According to examples:-phenol is heated with sulphuric acid, then naphthalene sulphonic acid and phosphorus peutoxide are added and the mixture heated further; crude cresol is sulphonated by sulphuric acid, anthracene-2-sulphonic acid is added, and then sulphur chloride, and the mixture heated; sulphur chloride is added to a mixture of phenol and naphthalene sulphonic acids and the mass heated with sulphuric acid. The products are worked up by dissolving in water, filtering, and partially neutralizing with alkali. Other condensing or coupling agents may be used, and other sulphonating agents, such as chlorsulphonic acid, sodium sulphite or bisulphite or formaldehyde bisulphite. The products are used in tanning either alone or mixed with vegetable or mineral tanning-agents. The Specification as open to inspection under Sect. 91 (3) (a) describes also the preparation of a tanning-agent by heating a mixture of sodium phenol-p-sulphonate and sodium 1-naphthylamine-6-sulphonate with formaldehyde solution; this subject-matter does not appear in the Specification as accepted.
GB2002720A 1916-07-20 1920-07-09 Manufacture of tanning agents and the application thereof Expired GB148126A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE528803X 1916-07-20

Publications (1)

Publication Number Publication Date
GB148126A true GB148126A (en) 1921-12-09

Family

ID=6553814

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2002720A Expired GB148126A (en) 1916-07-20 1920-07-09 Manufacture of tanning agents and the application thereof

Country Status (1)

Country Link
GB (1) GB148126A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5360453A (en) * 1992-01-28 1994-11-01 Ciba-Geigy Corporation Process for pickling and pretanning raw hides

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5360453A (en) * 1992-01-28 1994-11-01 Ciba-Geigy Corporation Process for pickling and pretanning raw hides

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