FIELD: chemistry.
SUBSTANCE: method relates to obtaining cellulose triacetate. Process is carried out in centrifuge by acetylating cotton cellulose with mixture of the following composition: acetic anhydride 49-51%, acetic acid - 12-14%, xylol - 36-39%. As process catalyst perchloric acid taken in amount 0.75-0.85% of cellulose weight is used. Catalyst is introduced at process temperature 17-19°C, after which during 1-1.5 hours temperature is raised to 28-30 and such temperature is supported during 6-7 hours.
EFFECT: ensuring possibility to obtain product which has higher indices of polymerisation degree, bound acetic acid, thermal stability.
1 tbl, 2 ex
| Title | Year | Author | Number |
|---|---|---|---|
| PROCESS FOR PREPARING SECONDARY CELLULOSE ACETATE | 0 |
|
SU1035030A1 |
| METHOD FOR PREPARATION OF CELLULOSE ACETATE | 0 |
|
SU1636415A1 |
| METHOD OF PREPARING CELLULOSE ACETATES | 0 |
|
SU696025A1 |
| PROCESS FOR PRODUCING CELLULOSE TRIACETATE | 0 |
|
SU933661A1 |
| PROCESS FOR PRODUCING CELLULOSE ACETATES | 0 |
|
SU992522A1 |
| METHOD OF SYNTHESIS OF CELLULOSE ESTER | 1992 |
|
RU2101293C1 |
| 0 |
|
SU1565350A3 | |
| METHOD OF ACETONE-SOLUBLE CELLULOSE ACETATE PRODUCING | 1992 |
|
RU2069215C1 |
| 0 |
|
SU258295A1 | |
| METHOD OF PREPARING CELLULOSE TRIACETATE | 0 |
|
SU576323A1 |
