Process and system for extraction by alkali oxygen bleaching and continues to deslenhificacao and wood pulp

摘要

9730-IR-PA OXYGEN ALKALI EXTRACTION OF CELLULOSIC PULP An aqueous solution of alkali and oxygen gas is added to chlorinated and washed pulp and the pulp is retained in a retention apparatus from one to five minutes to remove lignin from the pulp. The pulp is fed directly to a pressing and washing apparatus from the retention apparatus where the pulp is pressed to a consistency ranging from about 16 percent to 40 percent and then washed to a consistency ranging from about 9 percent to about 15 percent.