Title:
PRODUCTION METHOD FOR CELLULOSE ACETATE
Document Type and Number:
WIPO Patent Application WO/2019/198307
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide a production method for cellulose acetate, said method eliminating the need for performing a cleaning process using an organic solvent and reducing the environmental impact. The production method for cellulose acetate involves a step for hydrolyzing cellulose acetate and reducing the total degree of acetyl substitution by bringing a cellulose acetate mixture or solution into contact with a strong acid cation exchange resin, and a step for precipitating the cellulose acetate in which the total degree of acetyl substitution has been reduced by means of the hydrolysis.
Inventors:
YOSHIOKA SHUUJI (JP)
SHIMAMOTO SHU (JP)
PAN RITSUZUI (JP)
LIU XIAOJIAN (CN)
SHIMAMOTO SHU (JP)
PAN RITSUZUI (JP)
LIU XIAOJIAN (CN)
Application Number:
PCT/JP2019/003063
Publication Date:
October 17, 2019
Filing Date:
January 30, 2019
Export Citation:
Assignee:
DAICEL CORP (JP)
International Classes:
C08B3/06
Domestic Patent References:
| WO2014142166A1 | 2014-09-18 |
Foreign References:
| JPS51119088A | 1976-10-19 | |||
| JPH07206773A | 1995-08-08 |
Attorney, Agent or Firm:
PATENT CORPORATE BODY ARCO PATENT OFFICE (JP)
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