Patent · US Expired

Method for liming skins and hides

US4960428A · kind A · utility

8Cited by

5References

21Claims

0Family size

Assignee

Rohm Co., Ltd. · JP

Inventors

Juergen Christner · Emmelshausen, DE
Ernst Pfleiderer · Weiterstadt, DE
Tilman Taeger · Seeheim-Jugenheim, DE

Key dates

Filing date	Jan 26, 1989
Grant date	Oct 2, 1990
Priority date	—
Expiry date	Jan 26, 2009

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC14C1/06
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

A process for liming skins and hides with preservation and separation of the hair, including the following successive steps: PA0 (A) a soaking step in a aqueous liquor containing a surfactant; PA0 (B) an incubation step in an aqueous liquor free of inorganic sulfur but containing hydrotropes and organic sulfur compounds as unhairing agents; PA0 (C) an step for immunization of the hair at a pH between 10 and 14; PA0 (D) a hair loosening step in which inorganic sulfide is added to the float; PA0 (E) a separation step in which the hair is separated from the skins and hides; and PA0 (F) a liming step in which the pelts so obtained are limed in an aqueous alkaline liquor comprising liming aids.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.