C - Chemistry – Metallurgy – 08 – B
Patent
C - Chemistry, Metallurgy
08
B
C08B 11/20 (2006.01) A23L 1/0534 (2006.01) A61K 47/38 (2006.01) C08J 3/12 (2006.01)
Patent
CA 2338115
The present invention relates to a new, particularly economical process for preparing particulate water-soluble cellulose derivatives. The process involves forming a feed composition of swollen and/or dissolved cellulose derivative, and water. The feed composition is contacted with a superheated gas mixture, in a sieve-free high rotational speed gas jet impact mill, and the cellulose derivative of the feed composition is converted into a solid state form of finely particulate particles. The superheated gas mixture, with which the feed composition is contacted, is selected from: (i) a superheated gaseous mixture of steam and an inert gas; and (ii) a superheated gas mixture of steam and air. The superheated gas mixture has a steam content of 40 wt. % to 99 wt. %, based on the total weight of the superheated gas mixture.
Eckhardt Volker
Kiesewetter Rene
Morning Martin
Schlesiger Hartwig
Sonnenberg Gerd
Dow Wolff Cellulosics Gmbh
Fetherstonhaugh & Co.
Wolff Walsrode Aktiengesellschaft
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