Dow Global Technolgoies LLC

Michael Schreck

Matthias Sprehe

Yvonne M Goerlach-Doht

Juergen Hermanns

Alexandra Hild

Peter E Pierini

Marco Grossstueck

Jöerg Neubauer

Sonja Menz

A process for producing a crosslinked cellulose ether including the steps of (i) contacting at least one cellulose material with a mixture comprising (ia) at least one crosslinking agent and (ib) at least one alkalization reagent to form an activated cellulose material; and (ii) contacting the activated cellulose material of step (i) with at least one etherification reagent; wherein the at least one etherification reagent reacts with the activated cellulose material to form the crosslinked cellulose ether; and a crosslinked cellulose ether produced by the above process.

Process for producing a crosslinked cellulose ether

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.

Process for producing cellulose derivatives of high bulk density, good flowability and improved dispersibility in cold water

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Walsrode, Germany

Michael Schreck