Method for producing depolymerized cellulose ether
AssigneeShin-Etsu Chemical Co., Ltd.
InventorsKentaro Miki, Akira Kitamura, Mitsuo Narita
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Abstract
There is provided a method for producing a depolymerized cellulose ether, the method suppressing the formation of coarse aggregates during the contact with an acid aqueous solution in a depolymerization reaction, and reducing the amounts of aggregates and black contaminants, while suppressing yellowness. More specifically, there is provided a method for producing a depolymerized cellulose ether, the method including a depolymerization step of depolymerizing a cellulose ether by bring the cellulose ether of 45 to 95° C. into contact with an acid aqueous solution of 55 to 98° C. to obtain a depolymerized cellulose ether.
Claims12
A method for producing a depolymerized cellulose ether, the method comprising a step of depolymerizing a cellulose ether by bringing the cellulose ether of 45 to 95° C. into contact with a hydrogen chloride aqueous solution having a temperature of 55 to 98° C. and a concentration of more than 0% by mass and not more than 35% by mass to obtain a depolymerized cellulose ether, wherein the hydrogen chloride aqueous solution is added to the cellulose ether.
Dependencies are inferred from the claim text.