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US 8,916,700 B2Granted
Method for producing cellulose ether derivative
AssigneeKao Corporation
InventorsMunehisa Okutsu, Takeshi Ihara
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Abstract
The present invention relates to a process for selectively producing a cellulose ether derivative with a very high reaction efficiency of an organohalide compound. There is provided a process for producing a cellulose ether derivative such as carboxymethyl cellulose and hydroxyethyl cellulose in which a low-crystalline powdery cellulose having a crystallinity of 50% or less is reacted with an organohalide compound such as ethylene chlorohydrin, a monohaloacetic acid and a salt of the monohaloacetic acid in the presence of a base.
Claims18
A process for producing a cellulose ether compound comprising
- milling cellulose having a crystallinity of greater than 50%, thereby forming a low-crystalline powdery cellulose having a crystallinity of 50% or less, and
- reacting said low-crystalline powdery cellulose having a crystallinity of 50% or less with an organohalide compound in the presence of a base under a fluidizable powder condition,
- wherein during said reacting the water content is 50% by weight or less based on the weight of the low-crystalline powdery cellulose, and
- wherein during said reacting the total amount of organic solvent and water is 100% by weight or less based on the weight of the low-crystalline powdery cellulose.
1 more element
Dependencies are inferred from the claim text.