Abstract: A process for the purification and isolation of cellulose or starch ethers wherein directly after the etherification step the suspension agent and the extraction of the ether product with the purifying agent is carried out on the same continuously working filter.
Type:
Grant
Filed:
November 23, 1980
Date of Patent:
September 13, 1983
Assignee:
Wolff Walsrode AG and Bayer AG
Inventors:
Claus-Rudiger Bernert, Volker Hartwig, Christian Kords, Detmar Redeker