Improved process for preparing hydrocyanic acid

Details Improved process for preparing hydrocyanic acid Improved process for preparing hydrocyanic acid

C - Chemistry, Metallurgy

01

C

C01C 3/02 (2006.01)

Patent

CA 2662722

The invention relates to a method for the production of prussic acid, comprising the catalytic dehydration of gaseous formamide to give a product mixture, containing prussic acid, water, formamide, ammonia, CO and high-boilers, separation of the product mixture by condensation of a condensate from the product mixture which contains water, formamide, high-boilers and possibly ammonia and prussic acid, and the partial or complete recycling of the condensate to a heat exchanger downstream of the reactor.

La présente invention concerne un procédé de préparation d'acide cyanhydrique comprenant une déshydratation catalytique de formamide gazeux pour donner un mélange de produits contenant de l'acide cyanhydrique, de l'eau, du formamide, de l'ammoniac, du CO et des substances à point d'ébullition élevé; la séparation du mélange de produits par condensation d'un condensat à partir du mélange de produits obtenu contenant de l'eau, du formamide, des substances à point d'ébullition élevé et éventuellement de l'ammoniac et de l'acide cyanhydrique; et la récupération partielle ou complète du condensant dans un échangeur thermique connecté en aval du réacteur.

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