Patent · US Expired

Method for the delignification of lignocellulosic material in an amine delignifying liquor containing a quinone or hydroquinone compound

US4178861A · kind A · utility

27Cited by

5References

14Claims

0Family size

Assignee

Australian Paper Manufacturers Limited · AU

Inventors

Naphtali Vandernoek · Melbourne, AU
Peter Nelson · San Jose, US
Alan Farrington · Melbourne, AU

Key dates

Filing date	Dec 13, 1977
Grant date	Dec 18, 1979
Priority date	—
Expiry date	Dec 13, 1997

Classification

Technology area (CPC D)Textiles; Paper
CPC primaryD21C3/222
WIPO fieldTextile and paper machines
WIPO sectorMechanical engineering

Abstract

A delignification process using amine cooking liquors which also contain a quinoid or hydroquinoid compound. The process also encompasses a pretreatment step using the quinoid or hydroquinoid compounds.

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