Method of producing sodium dicyanamide

Details Method of producing sodium dicyanamide Method of producing sodium dicyanamide

2005-06-28

2005-06-28

O'Sullivan, Peter (Department: 1621)

Organic compounds -- part of the class 532-570 series

Organic compounds

Amino nitrogen containing

C564S103000, C564S104000

Reexamination Certificate

active

06911559

ABSTRACT:
A process is described for preparing sodium dicyanamide, in which cyanamide is reacted simultaneously with sodium hydroxide solution and cyanogen chloride in aqueous solution at temperatures of 20 to 100° and a pH of 7.0 to 10.0. By means of the inventive process it is possible, starting from raw materials which are available in technical-grade quality, to prepare sodium dicyanamide in good yields of 75 to 95% and very high purities of up to 100% in a very environmentally friendly manner, for which reason this process is particularly highly suitable for the industrial scale.

REFERENCES:
patent: 2562869 (1951-07-01), Nagy
patent: 3052517 (1962-09-01), Gilbert, Jr.
patent: 3279885 (1966-10-01), Sprague et al.
patent: 1218470 (1971-01-01), None
patent: 62-288102 (1988-05-01), None
patent: 63-256513 (1989-02-01), None

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