GB154153A - Manufacture of tanning materials - Google Patents

Manufacture of tanning materials

Info

Publication number
GB154153A
GB154153A GB32457/20A GB3245720A GB154153A GB 154153 A GB154153 A GB 154153A GB 32457/20 A GB32457/20 A GB 32457/20A GB 3245720 A GB3245720 A GB 3245720A GB 154153 A GB154153 A GB 154153A
Authority
GB
United Kingdom
Prior art keywords
formaldehyde
tanning
carbolic
liquor
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
GB32457/20A
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 GB154153A publication Critical patent/GB154153A/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

Abstract

Tanning agents are obtained by condensing an aromatic hydroxy compound, or an alkali salt thereof, with an aldehyde other than formaldehyde, and an acid sulphite in solution at ordinary pressures and at temperatures up to 100 DEG C. According to an example, carbolic liquor is condensed with acetaldehyde and sodium bisulphite. The products are suitable for tanning-agents, with or without addition of other tanning-agents or a suitable metallic salt such as aluminium or chromium sulphate. Specification 154,162 is referred to. The Specification as open to inspection under Sect. 91 (3) (a) includes also the use of formaldehyde and describes its condensation with sodium bisulphite and commercial phenol or carbolic liquor. This subject-matter does not appear in the Specification as accepted.ALSO:Condensation products made by heating an aromatic hydroxy compound with an aldehyde other than formaldehyde and an acid sulphite at ordinary pressure and at temperatures below 100 DEG C. may be mixed with a metal salt such as aluminium or chromium sulphate. In an example the hydroxy compound and aldehyde used are carbolic liquor and acetaldehyde. Specification 154,162 is referred to. The Specification as open to inspection under Sect. 91 (3) (a) refers also to the corresponding formaldehyde products; this subject-matter does not appear in the Specification as accepted.
GB32457/20A 1919-11-18 1920-11-17 Manufacture of tanning materials Expired GB154153A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE154153X 1919-11-18

Publications (1)

Publication Number Publication Date
GB154153A true GB154153A (en) 1922-02-17

Family

ID=5676156

Family Applications (1)

Application Number Title Priority Date Filing Date
GB32457/20A Expired GB154153A (en) 1919-11-18 1920-11-17 Manufacture of tanning materials

Country Status (1)

Country Link
GB (1) GB154153A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE968543C (en) * 1936-07-14 1958-03-06 Bayer Ag Cation exchanger

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE968543C (en) * 1936-07-14 1958-03-06 Bayer Ag Cation exchanger

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