Sulfite cooking method for the production of cellulose from mate

Details Sulfite cooking method for the production of cellulose from mate Sulfite cooking method for the production of cellulose from mate

1987-08-27

1988-08-30

Alvo, Steve

Paper making and fiber liberation

Processes of chemical liberation, recovery or purification...

With regeneration, reclamation, reuse, recycling or...

162 36, 162 72, 162 77, 162 83, D21C 320, D21C 1102

Patent

active

047675004

ABSTRACT:
A sulphite cooking process is described for the production of pulp from materials containing lignocelluloses, with recovery of the cooking chemicals, in which the cooking, the blowing, the washing and the bleaching are performed sucessively. The waste liquor is subjected to several thermal treatments for the recovery of the cooking chemicals. For the cooking of the lignocellulosic materials, alkaline sulphite solutions are used, to which one or, in mixture, several low-boiling solvents are added, as well as at least one compound suitable as a redox catalyst.

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patent: 4496426 (1985-01-01), Baumeister et al.
Hauki et al., "The Chemical Cycle and Recovery of Chemicals in NS-AQ Pulping"; Pulp Paper Canada 85:5 (1984) p. 65 paper presented 10-1982.
Davies et al., "Recovering Chemicals in a Closed Sulfite Mill," Tappi Journal, vol. 66, No. 7; Jul. 1983 p. 47.
Shick et al. "Development in Recovery of Sulfite Cooking Chemicals", Tappi, vol. 56, No. 8; Aug. 1973.

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