Pulping process

Details Pulping process Pulping process

D - Textiles, Paper

21

C

9/16

D21C 3/02 (2006.01) D21C 3/22 (2006.01)

Patent

CA 1216105

Abstract Pulping Process A process for the delignification of lignocellulosic material comprising treating the cellulosic material in a closed reaction vessel with an alkaline pulping liquor containing from 0.001% to 10.0% by weight based on the cellulosic material of a cyclic ketone selected from the group consisting of anthraquinone and anthraquinone substi- tuted with one or more alkyl radicals containing 1 - 4 carbon atoms, said treatment taking place at a maximum temperature in the range of from 150° to 200°C for a period of 0.5 to 480 minutes, the improvement comprising adding said cyclic ketone as a solution in sulphuric acid or neutralized sulphuric acid.

451494

Affiliated with

Also associated with

Rating

Pulping process does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Pulping process, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Pulping process will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-1321724