Alkali metal cyanide granulates and a process for their...

Details Alkali metal cyanide granulates and a process for their... Alkali metal cyanide granulates and a process for their...

C - Chemistry, Metallurgy

01

C

C01C 3/10 (2006.01)

Patent

CA 2110660

ABSTRACT OF THE DISCLOSURE The invention relates to new alkali metal cyanide granulates based on sodium cyanide or potassium cyanide and a method for their preparation. Commercially available alkali metal cyanide granulates consist of irregular particles. Disadvantages are in particular the tendencies to form dust and to cake. The alkali metal cyanide granulates according to the invention demonstrate virtually no abrasion and a reduced tendency to cake. 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/dm3, an abrasion of less than 1% and a caking index of at most 4. The granulates can be prepared by fluidized bed spray granulation, by 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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