Process for the preparation of cyanogen chloride
AssigneeCiba-Geigy Corporation
InventorsRoy Joseph Laran, H. Paul Loftin, Daniel C. McIntyre
Life of this patent
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Abstract
A process for the preparation of gaseous cyanogen chloride by a procedure involving reaction of hydrogen cyanide with chlorine in the presence of water with formation of hydrogen chloride as a by-product at a concentration of about 10 to 25% by weight and further involving converting by chlorination ammonium chloride, formed through acid-catalyzed hydrolysis of cyanogen chloride and admixed with the hydrogen chloride by-product, to nitrogen trichloride under pressure and at elevated temperature and decomposing the nitrogen trichloride to nitrogen and chlorine thermally or by U.V. radiation.
Claims3
In a process for the preparation of gaseous cyanogen chloride by a procedure involving reaction of hydrogen cyanide with chlorine in the presence of water with formation of a by-product hydrogen chloride at a concentration of about 10 to 25% by weight, the improvement which comprises converting by chlorination ammonium chloride formed through acid-catalyzed hydrolysis of cyanogen chloride and admixed with the hydrogen chloride by-product to nitrogen trichloride under pressure and at elevated temperature and decomposing the nitrogen trichloride to nitrogen and chlorine thermally or by U.V. radiation.
Dependencies are inferred from the claim text.