Acetylation of lignocellulosic materials
US5608051A · kind A · utility
11Cited by
10References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 13, 1994 |
| Grant date | Mar 4, 1997 |
| Priority date | — |
| Expiry date | Oct 13, 2014 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08B3/06
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.