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US 4,399,275 AGranted
Preparation of highly reactive cellulose
AssigneeITT Corporation
InventorKarl D. Sears
Life of this patent
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Abstract
Highly reactive cellulose is prepared by mercerizing cellulosic material and reacting it with an hydroxyalkylating agent to a degree of substitution ranging from 0.05 to 0.3, said degree of substitution being short of rendering the cellulose appreciably soluble in water. The highly reactive cellulose is particularly useful for the preparation of such cellulose derivatives as cellulose acetate at considerably improved production levels.
Claims9
A process for the preparation of cellulose acetate from highly reactive cellulose comprising
- mercerizing cellulosic material,
- reacting the mercerized cellulose with an hydroxyalkylating agent to a degree of substitution of the cellulose ranging from 0.05 to 0.3, said degree of substitution being insufficient to render said cellulose appreciably soluble in water,
- recovering the highly reactive substantially water insoluble cellulose reaction, and acetylating said cellulose reaction product.
Dependencies are inferred from the claim text.