Acetylation of lignocellulosic materials
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United States of America Patent
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Jul 7, 1998
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N/A
app pub date -
Jul 25, 1996
filing date -
Feb 24, 1994
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Abstract
The invention relates to a process for the acetylation of lignocellulosic materials (LM) by (a) bringing the LM into intimate contact with an acetylating agent comprising acetic anhydride as the major component at a temperature from 80.degree.-140.degree. C. and (b) bringing the acetylated LM from step (a) into contact with a heated gas inert under the reaction conditions in a stripper at a temperature above 140.degree. C. and reducing the acetic acid or acetic anhydride content of the acetylated LM produced in step (a) to below 10% by weight by stripping. Products fabricated from LMs so treated are highly dimensionally stable.
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