Process for preparation of alkali metal cyanide granulates

Details Process for preparation of alkali metal cyanide granulates Process for preparation of alkali metal cyanide granulates

1996-12-27

1999-06-22

Theisen, Mary Lynn

Plastic and nonmetallic article shaping or treating: processes

Formation of solid particulate material directly from molten...

Coated particles

23313FB, 264 14, 423371, B29B 900

Patent

active

059140755

ABSTRACT:
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.

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Company document Glatt.RTM. AGT (Feb. 92--3000 D (W)), Glatt Ingenieurtechnik GmbH (Weimar, Germany).

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