Wolff Walsrode Ag

Dow Wolff Cellulosics Gmbh

Lutz Riechardt

Lutz Hoppe

Gerd Sonnenberg

Dieter Herzog

Holger Tanneberger

Martin Lohrie

Bernd Haase

Oke Brauer

Dietrich Tegtmeier

A process for producing compacted free-flowing nitrocellulose based lacquer raw materials is described. The process involves pressing a nitrocellulose based lacquer feed material, which is moistened with alcohol or water, through the holes of a die. The pressing step may be performed by means of at least one circulating breaker. The process optionally comprises shearing off the compacted lacquer raw material into pieces of selected length, below the die. The compacted nitrocellulose based lacquer raw materials prepared by the process of the present invention are free flowing and have a moisture content of at least 25%.

Method for producing compacted free-flowing raw materials for varnish

The present invention relates to a process for producing methyl hydroxyalkyl cellulose ethers by alkalisation and etherification of celluloses, rinsing the methyl hydroxyalkyl cellulose ethers with water at higher temperatures and recovering the short-chain cellulose ethers that are soluble in the wash water, wherein the wash water containing sodium chloride and organic by-products is passed across a first stage of a membrane filtration having a molecular cut size of 200 to 150,000 Dalton, is concentrated during this process and passes across a second stage of a membrane filtration.

Process for producing methyl hydroxyalkyl cellulose ethers

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Walsrode, Germany

Lutz Riechardt