Process for producing cellulose derivatives of high bulk density, good flowability and improved dispersibility in cold water
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United States of America Patent
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May 10, 2016
Grant Date -
Jan 16, 2014
app pub date -
Mar 29, 2012
filing date -
Apr 6, 2011
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Abstract
A particulate cellulose derivative is obtained in a process of grinding and drying a moist cellulose derivative which comprises the steps of A) providing a cellulose derivative having a moisture content of from 60 to 95 percent, based on the total weight of the moist cellulose derivative, B) grinding and partially drying the moist cellulose derivative in a gas-swept impact mill; and C) contacting the ground and partially dried cellulose derivative with an additional amount of a drying gas outside the gas-swept impact mill. The obtained particulate cellulose derivative has a high untapped bulk density and a good flowability.
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