Multi-level sulfide content pulping

Details Multi-level sulfide content pulping Multi-level sulfide content pulping

D - Textiles, Paper

21

C

D21C 3/02 (2006.01)

Patent

CA 2069281

Paper pulp (e.g. kraft pulp or sulfite pulp) is produced utilizing at least two different supplies of cooking liquor (e. g. white liquor), having different percentages of lignin reaction enhancing or carbohydrate degradation slowing chemicals (e.g. one having low sulfide content, and the other high sulfide content). The high sulfide content supply is typically used to impregnate the pulp, while the second supply is used in other cooking stages (whether co-current or countercurrent). At least 60% of the sulfide of the cooking chemicals may be prodded in the first supply. Some of the sulfide in the first supply is desirably provided in the form of polysulfide or elemental sulfur. When about 2% polysulfide on wood is utilized yield is significantly increased. Utilizing multiple chemical (e. g. sulfide) content supplies results in an optimum viscosity/kappa ratio and/or pulp strength properties for the pulp produced.

Affiliated with

Also associated with

Rating

Multi-level sulfide content pulping does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Multi-level sulfide content pulping, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Multi-level sulfide content pulping will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-1546740