Improved method of producing pulp

Details Improved method of producing pulp Improved method of producing pulp

D - Textiles, Paper

21

H

D21H 17/05 (2006.01) D21C 3/22 (2006.01) D21H 17/06 (2006.01) D21H 17/07 (2006.01) D21H 17/09 (2006.01)

Patent

CA 2049360

Alkaline pulping (such as Kraft) processes for various lignocellulosic materials, such as coniferous or desiduous wood chips, into pulp is improved by adding relatively small amounts of a specific digestive additive such as sodium alpha-sulfo me- thyl laurate, cocodiethanolamide, butyl ethyleneoxide-propyleneoxide block copolymers, etc. to the alkaline cooking media to ob- tain pulps having a select Kappa number range with a reduction in pulp material reject percentage, a reduction of white liquor requirements and a reduction of cooking time period, relative to H-factor, reject percentages, white liquor requirements and di- gestion periods experienced in similar alkaline digestion processes without the inventive digestive additive.

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