Method for preparing tannable pelts from animal skins and hides

US3966551A · kind A · utility

Assignee

• Rohm Co., Ltd. · JP

Inventors

• Rolf Monsheimer · Darmstadt, DE
• Ernst Pfleiderer · Weiterstadt, DE

Key dates

• Filing date: Jan 28, 1975
• Grant date: Jun 29, 1976
• Expiry date: Jan 28, 1995

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C14C1/00
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

In a process for the preparation of tannable pelts from animal skins or hides wherein concurrent soaking, unhairing, opening up of the hide structure, and bating are effected in a single procedural step by treatment with enzymes in an aqueous bath containing enzymes, the improvement wherein the enzymatic treating bath is free of amines and comprises dissolved therein: PA1 A. an effective amount of at least one member selected from the group consisting of a fungus protease whose optimum efficacy towards casein is at a pH above 7.0, trypsin, papain, and a bacterial protease whose optimum efficacy is at a pH between 6 and 9; PA1 B. an effective amount of a bacterial protease having an optimum efficacy against hemoglobin at a pH above 9; and PA1 C. an effective amount of thioglycolic acid or a salt thereof.