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Title:
METHOD FOR CONTROLLING PITCH DEPOSIT IN PULP PREPARATION AND PAPER MAKING PROCESS
Document Type and Number:
Japanese Patent JPH06173192
Kind Code:
A
Abstract:

PURPOSE: To remove triglycerides and their hydrolysates from an aq. phase of a cellulosic slurry by adding specified amounts of lipase and a cationic polymer to the cellulosic slurry.

CONSTITUTION: Lipase and a cationic polymer are added to a cellulosic slurry in amounts effective for diminishing pitch deposits in a pulp and paper mill. They are added under the stirring condition sufficient to disperse lipase and the cationic polymer in the slurry. The cellulosic slurry is preferably exposed to a high temp. The incubation period is maintained during which activities of lipase and the cationic polymer are kept.


Inventors:
JIYOUDO EMU SAAKAA
MAASA AARU FUINKU
Application Number:
JP1993000175041
Publication Date:
June 21, 1994
Filing Date:
July 15, 1993
Export Citation:
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Assignee:
NALCO CHEMICAL CO
International Classes:
C12S3/08; D21C5/00; D21C9/08; D21H17/22; D21H17/34; D21H21/02; (IPC1-7): D21H17/34; C12S3/08; D21C9/08; D21H17/22
Attorney, Agent or Firm:
宇井 正一 (外4名)