Degussa Aktiengesellschaft

Ralph Marquardt

Rudolf Vanheertum

Stephanie Schauhoff

Liane Deusser

Christine Schick

Walter B&ouml;rner

Walter Boerner

Karl-Heinz Vieweg

The invention relates to a method of producing cyanuric chloride by trimerizing chlorocyan at a temperature of at least 250&#xb0; C. on washed activated carbon as the catalyst. The service life of the catalyst can be improved by using an activated coal with an effective pore volume V eff of equal or greater 0.17 ml/g, with V eff being the result of pores with a pore diameter ranging from 0.5 to 7 nm.

Method of producing cyanuric chloride

Acetone-cyanhydrin can be produced in a gas-liquid reactor from a hydrogen cyanide-containing gas, especially the crude gas originating from a methane-ammonia (BMA) or Andrussow process, and acetone in the presence of a base. The aim of the invention is to overcome the disadvantages of the methods for producing acetone-cyanhydrin known from the art. To this end, the gaseous phase removed from the reactor is liberated from the unreacted acetone and hydrogen cyanide in a gas purifier that is operated with a high-boiling solvent, especially with stabilized acetone-cyanhydrin, and the washed phase is fed to the gas-liquid reactor.

Method of producing acetone-cyanhydrin

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Frankfurt am Main, Germany

Ralph Marquardt