Process for the treatment of gas streams containing hydrogen cya

Details Process for the treatment of gas streams containing hydrogen cya Process for the treatment of gas streams containing hydrogen cya

1973-11-05

1976-05-11

Thomas, Earl C.

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Carbon dioxide or hydrogen sulfide component

423222, 423236, 423238, 423355, 423366, 423564, B01D 5334

Patent

active

039564606

ABSTRACT:
Ammonia, hydrogen cyanide and hydrogen sulfide contained in gas streams are separated from the gas streams by contacting the gas stream with an aqueous solution containing free oxygen for a time sufficient for the ammonia, hydrogen sulfide and hydrogen cyanide to react with the oxygen present to form ammonium thiocyanate and water for further treatment or disposal.
One method of treatment is to thermally and catalytically convert for the ammonium thiocyanate to ammonia or nitrogen and hydrogen sulfide in the form of a second gas stream which is processed for recovery of any formed ammonia and the hydrogen sulfide.

REFERENCES:
patent: 1580038 (1926-04-01), Halvorsen
patent: 2008253 (1935-07-01), Klempt
patent: 3086838 (1963-04-01), Giammarco
patent: 3849540 (1974-11-01), Maddox et al.
patent: 3855390 (1974-12-01), Matumoto et al.

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