| 摘要 |
The present invention relates to the preparation of water soluble cellulose sulfate esters. More particularly, it relates to an improved process of preparing cellulose sulfate esters wherein cellulose is slurried in dimethylformamide. To this cellulose-dimethylformamide slurry is then added liquid denitrogen tetroxide to form the cellulose nitrite ester. The cellulose nitrite ester is then converted to the water soluble cellulose sulfate ester by reacting with acetylsulfuric acid in an anhydrous reaction medium.
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