ACETYLATION OF LIGNOCELLULOSIC MATERIALS

摘要

This 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 80-140 DEG 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 DEG 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.