EFFECT OF LOW DOSE XYLANASE ON PULP IN PREBLEACH TREATMENT PROCESS
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United States of America Patent
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Issued Date -
Aug 27, 2015
app pub date -
May 13, 2015
filing date -
Nov 11, 2009
priority date (Note) -
Abandoned
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Abstract
A prebleach treatment of pulp with xylanase enzyme prior to chemical bleaching is disclosed. A process of making pulp comprises treating a pulp with xylanase in an amount of less than 50 g of xylanase per ton of pulp. The treating step is carried while buffering the pulp and xylanase with a buffering agent to a pH of from about 6.5 to about 7.5 prior to at least one bleaching stage to form a treated pulp.
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