公开(公告)号：US20200255547A1

公开(公告)日：2020-08-13

申请号：US16651159

申请日：2018-07-26

Applicant: DOW GLOBAL TECHNOLOGIES LLC

Inventor： Robert Appell ,  Jorg Theuerkauf ,  Matthias S Ober ,  Matthias Knarr

IPC: C08B11/08

Abstract: A process for preparing cellulose ether includes (a) alkylation and etherification of cellulose to form an initial cellulose ether, (b) washing and filtering of the initial cellulose ether; (c) optionally granulating the cellulose ether; (d) compounding the cellulose ether to form a dough; (e) optionally disposing the cellulose ether into a buffer tank; and (f) drying the cellulose ether dough to obtain a final cellulose ether with a lower viscosity than the initial cellulose ether; where the process is characterized by introducing an aqueous catalyst and a peroxy-containing oxidizer to the cellulose ether during at least one of steps (c)-(f), introducing an aqueous enhancer during at least one of steps (c)-(e) and wherein the process is free of drying an isolating cellulose ether after (a) and before drying the final cellulose ether.