Method for producing cellulose ether
AssigneeShin-Etsu Chemical Co., Ltd.
InventorMitsuhiro Yoshida
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Abstract
Provided is a method for producing a cellulose ether including a drying step capable of continuously and stably drying a highly adhesive wet cellulose ether with high thermal efficiency without causing adhesive growth and solidification of the wet cellulose ether in a dryer. More specifically, the method for producing a cellulose ether includes a step of drying a wet cellulose ether having water content of more than 50% by weight in a rotary type through-flow dryer.
Claims12
A method for producing a cellulose ether comprising a step of drying a cake-like and fibrous wet cellulose ether having water content of more than 50% by weight in a rotary type through-flow dryer, wherein the rotary type through-flow dryer is a convective heat-transfer type dryer and dries a material placed in a cylindrical rotating drum by allowing hot air to pass through the material, such that the step of drying comprises
- passing hot air through the cellulose ether to evaporate water or volatile components therefrom, and subjecting the cellulose either to a perpendicular rotation and floating movement by rotation of the rotating drum such that the cellulose ether is dried while being mixed and stirred, wherein the rotating drum comprises a lifter, and wherein materials of the rotating drum and the lifter are stainless steel, and do not include an anti-adhesion coating.
Dependencies are inferred from the claim text.