GB827430A - Chrome tanning mixtures and preparation of leather therewith - Google Patents
Chrome tanning mixtures and preparation of leather therewithInfo
- Publication number
- GB827430A GB827430A GB38269/57A GB3826957A GB827430A GB 827430 A GB827430 A GB 827430A GB 38269/57 A GB38269/57 A GB 38269/57A GB 3826957 A GB3826957 A GB 3826957A GB 827430 A GB827430 A GB 827430A
- Authority
- GB
- United Kingdom
- Prior art keywords
- formaldehyde
- condensed
- sodium
- sodium hydroxide
- 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
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
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
A product obtainable from methylol compounds of mono- or poly-valent phenols, polynuclear phenols or phenol resins by condensation with sulphites and/or bisulphites is ememployed as a tanning agent. The syntan may be produced in the presence of an alcohol or an aldehyde and/or a ketone. Example 1: a mixture of phenol and cresol is condensed in presence of sodium hydroxide with formaldehyde, sodium bisulphite and methanol added, the mixture heated, cooled and aftertreated with urea. Example 3: dihydroxy-diphenyldimethylmethane is condensed with formaldehyde in the presence of sodium hydroxide and sodium metabisulphite. Example 4: phenol is condensed with formaldehyde in the presence of hydrochloric acid to form a low molecular weight resin which is reacted with sodium bisulphite and formaldehyde in the presence of sodium hydroxide. Specifications 443,967, 478,280, 510,743, 595,337, 615,190, 683,084, 701,103 and 705,663 are referred to.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE827430X | 1956-12-11 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB827430A true GB827430A (en) | 1960-02-03 |
Family
ID=6748011
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB38269/57A Expired GB827430A (en) | 1956-12-11 | 1957-12-09 | Chrome tanning mixtures and preparation of leather therewith |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB827430A (en) |
-
1957
- 1957-12-09 GB GB38269/57A patent/GB827430A/en not_active Expired
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