Process for bleaching and delignification of lignocellulosic
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United States of America Patent
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Feb 25, 1992
Grant Date -
N/A
app pub date -
Aug 18, 1989
filing date -
Aug 18, 1989
priority date (Note) -
Expired
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Abstract
Delignification and bleaching of lignocellulosic material is enhanced after the pulp has been treated with peroxomonosulfuric acid. The starting pH of the reaction with peroxomonosulfuric acid is between 7 and 11, and the reaction is continued until a final pH of 3 to 5 obtained. Subsequently the pulp is delignified and bleached with peroxide and/or oxygen.
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