Yvonne M. Goerlach-Doht,Juergen Hermanns,Bettina Hoelzer
申请号：
US14422253
公开号：
US20150239992A1
申请日:
2013.09.23
申请国别(地区):
US
年份:
2015
代理人:
摘要：
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 C) contacting the ground and partially dried cellulose derivative with an additional amount of a drying gas outside the gas-swept impact mill and D) subjecting the cellulose derivative to partial depolymerization after having contacted the cellulose derivative with a drying gas in step C). The obtained particulate cellulose derivative has a high untapped bulk density, a good flowability and a low color intensity.
