Alkaline extraction stages comprising xylanase
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United States of America Patent
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Jun 2, 2009
Grant Date -
N/A
app pub date -
Dec 19, 2001
filing date -
Dec 22, 2000
priority date (Note) -
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status (Latency Note)
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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.
First Claim
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International Classification(s)
- 2001 Application Filing Year
- D21C Class
- 111 Applications Filed
- 38 Patents Issued To-Date
- 34.24 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 1 Citation Count
- D21C Class
- 10.38 % this patent is cited more than
- 16 Age