Degussa Aktiengesellschaft

Christian Alt

Herbert Riemenschneider

Josef Leutner

Stefan Schulze

Martina Claus

Ruediger Schuette

Andreas Harthun

Juergen Loroesch

Andreas Goelz

Joachim Luethi

Heinz Monch

Jurgen Lorosch

Heinz Moench

Processes for preparing alkali metal alkoxide granules and alkaline earth metal alkoxide granules of aliphatic, saturated or unsaturated, unbranched or branched alcohols, preferably having 1 to 12, in particular 1 to 6, carbon atoms. A preferred process for preparing the alkoxides utilizes fluidized-bed spray granulation.

Processes for preparing alkali metal alkoxide granules and alkaline earth metal alkoxide granules

New alkali metal cyanide granulates based on sodium cyanide or potassium cyanide and a method for their preparation are disclosed. Commercially available alkali metal cyanide granulates consist of irregular particles; disadvantages are in particular the tendencies to form dust and to cake. The disclosed alkali metal cyanide granulates demonstrate a reduced tendency to cake and virtually no abrasion. The granulates are characterized by essentially spherical particles with particle diameters in the range 0.1 to 20 mm, a bulk density of more than 600 g/dm.sup.3, an abrasion of less than 1%, and a caking index of at most 4. The granulates can be prepared by fluidized bed spray granulation involving spraying an aqueous solution containing alkali metal cyanide onto alkali metal cyanide nuclei in a fluidized bed and evaporating the water.

Process for preparation of alkali metal cyanide granulates

Granulated alkali metal cyanide

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Gelnhausen, Germany

Christian Alt