C - Chemistry – Metallurgy – 08 – H
Patent
C - Chemistry, Metallurgy
08
H
C08H 8/00 (2010.01) B27K 3/36 (2006.01) B27K 5/00 (2006.01) C08B 3/06 (2006.01)
Patent
CA 2133936
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 at a temperature from 70-140°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°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.
Nelson Helen Louise
Richards David Ian
Simonson Rune
A-Cell Acetyl Cellulosics Ab
Bp Chemicals Limited
Fetherstonhaugh & Co.
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