Akzo N.v.

Gunter Sudheimer

Hans G Zengel

Gerhard Meyer

Hans Grothaus

Aqueous ammonium thiocyanate solutions are prepared continuously by reaction of ammonia with carbon disulfide in the presence of water using activated carbon as catalyst at pressures of from 2 to 7 bar. In this way, a very pure product can be obtained. The process can be carried out at very low cost, because both the addition of ammonia to carbon disulfide and the decomposition of the resulting ammonium dithiocarbamate can be carried out in a reactor in one step under identical conditions.

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Darmstadt, Germany

Gunter Sudheimer