Preparation of cellulose acetate
US4234719A · kind A · utility
11Cited by
12References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 29, 1979 |
| Grant date | Nov 18, 1980 |
| Priority date | — |
| Expiry date | Jun 29, 1999 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C51/56
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Cellulose acetate is produced from methanol, carbon monoxide and cellulose in an integrated series of steps wherein acetic anhydride produced in a first step by the carbonylation of methyl acetate is used to acetylate cellulose to produce cellulose acetate and to co-produce acetic acid, the co-produced acetic acid is dehydrated and the dehydrated acetic acid reacted with methanol to produce methyl acetate which is then fed to the first step and carbonylated to produce additional quantities of acetic anhydride.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.