Process of producing solid sodium cyanide

Details Process of producing solid sodium cyanide Process of producing solid sodium cyanide

1993-11-23

1995-01-24

Langel, Wayne

Chemistry: physical processes

Physical processes

Agglomerating

23293R, C22B 114

Patent

active

053839404

ABSTRACT:
Invention relates to a process of producing solid sodium cyanide. The process according to the invention is characterized in that an aqueous sodium cyanide solution (1) of 30 to 45% by mass, containing up to 5% by mass solids, is granulated in two process steps in counterflow with heated air, wherein in the first process step a fluidized bed is produced in a fluidized bed granulator (4) by means of hot air (5) from the second process step, in so doing the air being cooled down to a temperature of 60.degree. to 90.degree. C. a sodium cyanide granulate of 2 to 6 mm being set in a classifying discharge duct (16) and the same being dried to a residual moisture of 1.5 to 4% by mass, wherein in the second process step in a further fluidized bed of a drier (14) the granulate produced is dried through an air current (25) with initial temperatures of 150.degree. to 230.degree. C. to a residual moisture settable at liberty of less than 1.5% by mass and is removed by way of a cellular wheel (20 ).

REFERENCES:
patent: 3206278 (1965-09-01), Green
patent: 3207574 (1965-09-01), Popper
patent: 3849233 (1974-11-01), Lykov et al.
patent: 4946653 (1990-08-01), Stopp et al.

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