SE304072B - - Google Patents
Info
- Publication number
- SE304072B SE304072B SE90665A SE90665A SE304072B SE 304072 B SE304072 B SE 304072B SE 90665 A SE90665 A SE 90665A SE 90665 A SE90665 A SE 90665A SE 304072 B SE304072 B SE 304072B
- Authority
- SE
- Sweden
- Prior art keywords
- hides
- skins
- dehairing
- hydrazine
- bating
- Prior art date
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
- C14C1/00—Chemical treatment prior to tanning
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Medicines Containing Material From Animals Or Micro-Organisms (AREA)
- Cosmetics (AREA)
- Treatment And Processing Of Natural Fur Or Leather (AREA)
- Chemical Or Physical Treatment Of Fibers (AREA)
Abstract
In a process for softening, dehairing and bating skins and hides, they are subjected, e.g. at a pH between 5 and 10, to the action of at least one proteolytic enzyme and are also treated, before during or after said enzyme action, with hdrazine, e.g. hydrazine hydrate, or a hydrazonium salt, e.g. hydrazonium sulphate. Enzymes derived from micro-organisms, such as fungal proteases from Aspergillus parasiticus and Aspergillus flavas or bacterial proteases from Bacillus subtilis, are suitable. Enzymes derived from animals, such as pancreatic trypsin (pancreas tryptase) may be used. In Example 7, protease from Bacillus subtilis and pancreas tryptase are used for dehairing softened ox hides. In Example 13, pancreas tryptase and protease from 'Aspergillus flavus are used for bating alkaline-limed goat skins. The proteolytic enzyme may be used in the presence of carbohydrases (Example 4), or in the presence of one or more than one of the following salts: ammonium sulphate, sodium bisulphite, sodium chloride and soda. In Example 2, phthalimide is present during dehairing and softening of ox hides. In dehairing skins or hides, they may be soaked in an aqueous solution of hydrazine or a hydrazonium salt, and the proteolytic enzyme may then be added without further addition of water. In softening and dehairing skins or hides, between 0.25 and 1.25%, of hydrazine or hydrazonium salt may be used, computed on the weight of the skins or hides. In bating skins or hides, between 0.025 and 1.0% of hydrazine or hydrazonium salt may be used.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DER37032A DE1282838B (en) | 1964-01-22 | 1964-01-22 | Process for softening, dehairing or pickling fur or skins with proteolytic enzymes |
Publications (1)
Publication Number | Publication Date |
---|---|
SE304072B true SE304072B (en) | 1968-09-16 |
Family
ID=7405074
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SE90665A SE304072B (en) | 1964-01-22 | 1965-01-22 |
Country Status (5)
Country | Link |
---|---|
BE (1) | BE658697A (en) |
CH (1) | CH444365A (en) |
DE (1) | DE1282838B (en) |
GB (1) | GB1040401A (en) |
SE (1) | SE304072B (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3704465C2 (en) * | 1987-02-13 | 1995-11-02 | Roehm Gmbh | Liquid formulations of enzymes |
CN114891932B (en) * | 2022-05-09 | 2023-03-03 | 四川大学 | Enzyme unhairing method adopting Cu (II) ion composite inhibitor system |
-
1964
- 1964-01-22 DE DER37032A patent/DE1282838B/en active Pending
- 1964-11-27 CH CH1537564A patent/CH444365A/en unknown
-
1965
- 1965-01-15 GB GB195565A patent/GB1040401A/en not_active Expired
- 1965-01-22 SE SE90665A patent/SE304072B/xx unknown
- 1965-01-22 BE BE658697A patent/BE658697A/xx unknown
Also Published As
Publication number | Publication date |
---|---|
DE1282838B (en) | 1968-11-14 |
BE658697A (en) | 1965-05-17 |
CH444365A (en) | 1967-09-30 |
GB1040401A (en) | 1966-08-24 |
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