Process for preparing cellulose sulfate esters

Details Process for preparing cellulose sulfate esters Process for preparing cellulose sulfate esters

1983-10-31

1984-10-30

Griffin, Ronald W.

Organic compounds -- part of the class 532-570 series

Organic compounds

Carbohydrates or derivatives

C08B 514

Patent

active

044800916

ABSTRACT:
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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patent: 4138535 (1979-02-01), Schweiger
patent: 4242506 (1980-12-01), Schweiger
patent: 4273118 (1981-06-01), Smith

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