Patent ID: 11905339
Assignee: SE TYLOSE GMBH & CO. KG
Field: Macromolecular chemistry, polymers (Chemistry)
Classification: CPC C | IPC C

Claim 0:
1. A method for producing a low-viscosity cellulose ether product, the method comprising the steps:
(i) providing at least one water-moist cellulose ether starting material, wherein the dry content of the water-moist cellulose ether starting material is from 20-85 wt. %, based on the total mass thereof, and the water content of the water-moist cellulose ether starting material is from 15-80 wt. %, based on the total mass thereof;
(ii) adding at least one oxidising agent to the cellulose ether starting material from step (i) under shear;
(iii) treating the mixture obtained in step (ii) at temperatures in the range of 20-100° C.;
(iv) drying the mixture obtained in step (iii), wherein the water content of the mixture obtained after said drying step (iv) is 10 wt. %, based on the total mass of the mixture; and
(v) adding at least one alkaline salt to the mixture obtained in step (iv) to obtain the low-viscosity cellulose ether product, the cellulose ether starting material having a higher solution viscosity than the cellulose ether product.