Method for preparing tannable pelts from animal skins and hides

US3986926A · kind A · utility

Assignee

• Rohm Co., Ltd. · JP

Inventors

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

Key dates

• Filing date: Jan 9, 1974
• Grant date: Oct 19, 1976
• Expiry date: Jan 9, 1994

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S435/917
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A method for preparing tannable pelts from animal skins or hides, said method effecting concurrent softening, dehairing, opening of the hide structure, and bating in a single procedural step, which method comprises treating said skins or hides, free of preserving salt, with an aqueous bath having a pH between about 9 and about 12 and having dissolved therein: 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, and which protease may be replaced in whole or in part by trypsin and/or papain and/or by a bacterial protease whose maximum efficacy lies at a pH from 6 to 9; B. an effective amount of a bacterial protease having an optimum efficacy against hemoglobin at a pH above 9; and C. an effective amount of a short-chained, primary or secondary aliphatic amine.