Hydrogen cyanide process and apparatus therefor

C - Chemistry – Metallurgy – 01 – C

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C01C 3/02 (2006.01) B01J 8/02 (2006.01) B01J 19/00 (2006.01) B01J 19/24 (2006.01)

Patent

CA 2230017

A catalytic process and apparatus therefor for the manufacture of hydrogen cyanide. In the process an oxygen rich oxidant stream and at least one oxidant-free feed stream containing methane and ammonia are separately preheated and rapidly mixed to form a detonable mixed stream at a temperature which is at least 50 °C below the autoignition temperature of the mixed stream. The mixed stream is then conveyed to a catalyst capable of catalysing the formation of hydrogen cyanide at such a velocity that detonation is avoided. The process is more energy efficient and gives rise to an effluent stream containing more hydrogen than the conventional Andrussow process.

Le dispositif concerne un procédé catalytique pour la fabrication de cyanure d'hydrogène et un dispositif correspondant. Le procédé consiste à préchauffer séparément un flux oxydant riche en oxygène et au moins un flux d'alimentation dépourvu d'oxydant et contenant du méthane et de l'ammoniac, puis à mélanger rapidement les deux flux en vue de constituer un flux mixte apte à la détonation à une température au moins inférieure de 50 DEG C à la température d'autoinflammation de l'ensemble. On envoie ensuite le flux mixte à un catalyseur capable de provoquer par catalyse la formation de cyanure d'hydrogène à une rapidité telle que la déflagration soit évitée. Le procédé en question consomme moins d'énergie et engendre un effluent qui contient plus d'hydrogène que le flux résultant de la réaction d'Andrussow classique.

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