Patent · US Expired

Process and agent for the oxidative bleaching of wood pulp and for deinking waste paper

US5607544A · kind A · utility

13Cited by

2References

13Claims

0Family size

Assignee

BK Ladenburg GmbH fur Chemische Erzeugnisse · DE

Inventors

Wolfram Salzburger · Bensheim, DE
Silke Eifler · Dudenhofen, DE
Margarete Scholl · Mannheim, DE

Key dates

Filing date	Mar 27, 1995
Grant date	Mar 4, 1997
Priority date	—
Expiry date	Mar 27, 2015

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02W30/64
WIPO fieldTextile and paper machines
WIPO sectorMechanical engineering

Abstract

The present invention provides a process for the oxidative bleaching of wood pulps and for deinking waste paper by means of hydrogen peroxide and a stabilizing agent, wherein, as stabilizing agent, there is used 2-oxo-2-(4-hydroxyphenyl)-acethydroximic acid chloride (N,4-dihydroxy-.alpha.-oxophenylethanimidoyl chloride) of the formula: ##STR1##

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