Production of prehydrolyzed pulp

Details Production of prehydrolyzed pulp Production of prehydrolyzed pulp

1994-05-13

1996-12-31

Czaja, Donald E.

Paper making and fiber liberation

Processes of chemical liberation, recovery or purification...

Treatment with particular chemical

162 19, 162 29, 162 52, 162 72, 162 37, D21C 106, D21C 302

Patent

active

055890334

ABSTRACT:
Processes for preparing pulp from lignin-containing cellulosic material are disclosed including a prehydrolysis step followed by neutralizing hydrolysate and the prehydrolyzed cellulosic material in the reactor with alkaline neutralizing liquor, removing the neutralized hydrolysate from the reactor and delignifying the neutralized prehydrolyzed cellulosic material with alkaline cooking liquor containing sodium sulfide and sodium hydroxide.

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patent: 5346591 (1994-09-01), Henricson
Ronald G. MacDonald, Ed., "The Pulping of Wood," Pulp and Paper Manufacture, Sec. Ed., vol. I, pp. 422-427, McGraw-Hill Book Company.
Sven A. Rydholm, "Multistage Cooking Processes," Pulping Processes, pp. 649-672, Interscience Publishers, 1965.

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