Delignification of lignocellulosic material with an alkaline liq

Details Delignification of lignocellulosic material with an alkaline liq Delignification of lignocellulosic material with an alkaline liq

1978-05-26

1979-01-16

Bashore, S. Leon

Paper making and fiber liberation

Processes of chemical liberation, recovery or purification...

Treatment with particular chemical

162 90, D21C 302, D21C 320

Patent

active

041347870

ABSTRACT:
A process for the delignification of a lignocellulosic material, which comprises the steps of: (a) digesting the lignocellulosic material with an aqueous, alkaline pulping liquor containing from about 0.1% to about 10% based on the weight of oven-dried lignocellulosic material, of a cyclic amino compound selected from the group consisting of phenazine, dihydrophenazine, quinoxaline, and their alkyl, alkoxy, hydroxy, carboxy and amino derivatives at a temperature of from about 150.degree. C. to about 200.degree. C. for a period of from about 5 to about 480 minutes; and then (b) removing the aqueous pulping liquor from the lignocellulosic material with water or an aqueous wash liquor inert to the lignocellulosic material to obtain a delignified cellulosic material.

REFERENCES:
patent: 2068151 (1937-01-01), Remlar
patent: 2813868 (1957-11-01), Konig
patent: 3236850 (1966-02-01), Oswald et al.
patent: 4012280 (1977-03-01), Holton
Institute Paper Chemistry Abstract Bulletin, vol. 39, No. 9 (Mar. 1969), Abstract #7327.
Takagi et al., Starke 20, No. 8 pp. 251-256, (8-1968), "Determination of Carbonyl Groups In Starches . . ."

Affiliated with

Also associated with

Rating

Delignification of lignocellulosic material with an alkaline liq does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Delignification of lignocellulosic material with an alkaline liq, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Delignification of lignocellulosic material with an alkaline liq will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-650261