Patent · US Expired

Process for bleaching and delignifying cellulose-containing products

US5034096A · kind A · utility

8Cited by

3References

18Claims

0Family size

Assignee

SKW Trostberg Aktiengesellschaft · DE

Inventors

Benedikt Hammer · Trostberg, DE
Horst Michaud · Trostberg, DE
Stefan Weiss · Trostberg, DE

Key dates

Filing date	Dec 9, 1986
Grant date	Jul 23, 1991
Priority date	—
Expiry date	Dec 9, 2006

Classification

Technology area (CPC D)Textiles; Paper
CPC primaryD21C9/1036
WIPO fieldTextile and paper machines
WIPO sectorMechanical engineering

Abstract

The present invention provides a process for bleaching and delignifying cellulose-containing products with peroxides and/or oxygen and/or ozone, wherein there is additionally used 0.01 to 2.5% by weight of cyanamide and/or cyanamide salts, referred to the dry weight of the cellulose.

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