Alkaline extraction stages comprising xylanase

Details Alkaline extraction stages comprising xylanase Alkaline extraction stages comprising xylanase

2001-12-19

2009-06-02

Marx, Irene (Department: 1651)

Chemistry: molecular biology and microbiology

Process of utilizing an enzyme or micro-organism to destroy...

Treating animal or plant material or micro-organism

C162S073000, C162S074000, C162S078000, C008S101000, C008S107000, C008S115000, C008S115510

Reexamination Certificate

active

07541175

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.

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