Patent · US Expired

Process for the delignification of lignocellulose materials with dinitroanthraquinones

US4350566A · kind A · utility

0Cited by

2References

4Claims

0Family size

Assignee

BAYER HEALTHCARE LLC · DE

Inventors

Heinz U. Blank · Odenthal, DE
Gunther Klag · Leverkusen, DE
Peter Schnegg · Odenthal, DE

Key dates

Filing date	Apr 27, 1981
Grant date	Sep 21, 1982
Priority date	—
Expiry date	Apr 27, 2001

Classification

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

Abstract

A process for delignifying lignocellulosic material with a digestion liquor of nitroanthraquinones and/or dinitroanthraquinones. The process can be carried out in a closed reaction vessel at temperatures of 150.degree.-200.degree..+-. C. for 0.5 to 480 minutes with 0.001 to 10% nitroanthraquinone and/or dinitroanthraquinone by weight of lignocellulosic material.

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