Acetylation of lignocellulosic materials

Details Acetylation of lignocellulosic materials Acetylation of lignocellulosic materials

1994-10-13

1997-03-04

Mullis, Jeffrey C.

Organic compounds -- part of the class 532-570 series

Organic compounds

Carbohydrates or derivatives

C08B 306

Patent

active

056080514

ABSTRACT:
This invention relates to a process for the acetylation of lignocellulosic materials (LM) by (a) bringing the LM into the intimate contact with an acetylating agent comprising acetic anhydride at a temperature from 70.degree.-140.degree. C. and (b) bringing the acetylated LM from step (a) into contact with a superheated chemical agent comprising acetic acid and/or anhydride at a temperature above 140.degree. C. so as to reduce the acetic acid or acetic anhydride content of the acetylated LM to below 10% by weight. LM's treated in this manner have excellent dimensional stability.

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