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Title:
ALKALINE EXTRACTION STAGES COMPRISING XYLANASE
Document Type and Number:
WIPO Patent Application WO2002052100
Kind Code:
A3
Abstract:
The invention can be summarized as follows. There is provided a method of bleaching chemical pulp comprising the steps of exposing chemical pulp to a chemical bleaching state to produce a partially bleached pulp and treating the partially bleached pulp with a thermophilic, alkalophilic xylanase in an alkaline extraction stage at pH of 8 to 14. The method may be performed in a mill and may form part of a more complex pulp bleaching process. The invention also relates to the use of a thermophilic, alkalophilic xylanase in an alkaline extraction stage of a pulp bleaching process in a mill.

More Like This:
WO/2002/052101FULLY BLEACHED SULFITE CHEMICAL PULP, A PROCESS FOR THE PRODUCTION THEREOF AND PRODUCTS DERIVED THEREFROM
WO/1998/017857REMOVAL OF METALS FROM TREATMENT FLUIDS IN A CELLULOSE PULP MILL
Inventors:
TOLAN JEFF (CA)
POPOVICI CORINA (CA)
FOODY PATRICK J (CA)
Application Number:
PCT/CA2001/001837
Publication Date:
June 12, 2003
Filing Date:
December 19, 2001
Export Citation:
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Assignee:
IOGEN BIO PRODUCTS CORP (CA)
TOLAN JEFF (CA)
POPOVICI CORINA (CA)
FOODY PATRICK J (CA)
International Classes:
D21C9/10; D21C5/00; (IPC1-7): D21C9/10; D21C5/00
Domestic Patent References:
WO1997022692A11997-06-26
Foreign References:
US5736384A1998-04-07
US5645686A1997-07-08
Download PDF:
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