Henkel Kommanditgesellschaft Auf Aktien

Norbert Kuhne

Wilfried Rahse

Willi Wust

Hasso Leischner

Franz-Josef Carduck

Horst Upadek

Kathleen Paatz

Werner Pichler

Multi-enzyme granules

This invention is directed to the preparation of alkali cellulose. More particularly, this invention is directed to a process for the preparation of alkali cellulose having a low water content, wherein finely divided cellulose suspended in a typical inert organic solvent is presteeped and the cellulose suspension is contacted with an alkali metal hydroxide/alcohol mixture and at least one aqueous alkalization solution of different concentration.

Preparation of alkali cellulose having a low water content

This invention is directed to a method for the continuous production of alkyl cellulose by reacting alkali cellulose with alkylating agents in the presence of inert liquids, wherein:

Preparation of alkyl cellulose

This invention relates to an improved process for preparing cellulose derivatives by alkalizing cellulose to form alkali cellulose, alkylating the alkali cellulose to form alkylated alkali cellulose, and recovering the alkylated alkali cellulose. According to the process of the invention, finely-divided, preferably powdered, cellulose is reacted with an aqueous-alcoholic alkali metal hydroxide solution at a temperature of from about 20.degree. to 120.degree. C., to form alkali cellulose, oxygen is removed, and the water content is reduced to from about 2.5 to 6.0 moles per anhydroglucose unit, prior to alkylization.

Preparation of cellulose derivatives using highly reactive alkali

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Haan, Germany

Norbert Kuhne