Process for producing particulate, water-soluble cellulose...

Details Process for producing particulate, water-soluble cellulose... Process for producing particulate, water-soluble cellulose...

2007-08-21

2007-08-21

Maier, Leigh C. (Department: 1623)

Organic compounds -- part of the class 532-570 series

Organic compounds

Carbohydrates or derivatives

C536S127000

Reexamination Certificate

active

09785905

ABSTRACT:
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.

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patent: 2262527 (1993-06-01), None
patent: 98/31710 (1998-07-01), None
Translation of WO 98/31710.

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