Degussa Aktiengesellschaft

Cyplus Gmbh

Evonik Degussa Gmbh

Ernst Gail

Lukas M Von Hippel

Martin Bewersdorf

Manfred Sauer

Markus Jafeld

Annette Dickmann

Robert Weber

Stephan Schäflein

Stefan Franke

Helmut Schwarz

Norbert Steier

Andreas Rubo

Lukas Von Hippel

The invention relates to a method for producing shaped inorganic cyanide bodies, especially made of alkaline metal cyanides and alkaline earth metal cyanides, by pressing particulate inorganic cyanide obtained by means of a crystallization method. According to the invention, a cyanide crystallate separated from a mother liquor by means of a solid-liquid separation device and containing 2-15 wt. % water is fed to a forming device without the addition of an auxiliary forming agent and placed under pressure and compressed to form shaped bodies containing 0.1-12 wt. % water. The amount of water contained by the shaped bodies is always less than that contained in the crystallates used for the production thereof. Preferably, the crystallite is pressed out of a rotary filter or a centrifuge at a temperature of more than 40&#xb0; C. to form shaped bodies containing 0.2-6 wt. % residual water. The inventive method can be carried out in a more economical manner than previously known methods using dried cyanide. The invention also relates to shaped inorganic cyanide bodies obtained according to said method.

Process for producing shaped articles of inorganic cyanides and products obtainable by the process

The invention relates to an improvement to the BMA process for the production of hydrogen cyanide from methane and ammonia in the presence of a platinum-containing catalyst. The problem of sooting, and thus the decrease in activity, of the catalysts can be reduced, or the activity increased, in that the catalyst is doped with an element from the series Cu, Ag, Au, Pd and W. The doping is preferably in the range of 0.01 to 20 mole % doping element, based on Pt.

Process for the production of hydrogen cyanide by the BMA process and catalyst for the implementation therefor

Growing community of inventors

Egelsbach, Germany

Ernst Gail