C - Chemistry – Metallurgy – 02 – F
Patent
C - Chemistry, Metallurgy
02
F
C02F 1/58 (2006.01) C02F 1/72 (2006.01) C02F 1/78 (2006.01)
Patent
CA 2070364
"METHOD FOR TREATING AQEOUS STREAMS CONTAINING UNDESIRED AMOUNTS OF CYANIDE" ABSTRACT A cyanide-containing aqueous stream is treated to reduce the cyanide concentration by oxidation of cyanide using oxygen as the oxidizing agent under mild reaction conditions in the presence of a metal chelate catalyst. Especiallyeffective chelates are metal phthalocyanines, particularly where the metal is vanadium or a member of the iron group metals. The oxidation can be effected homogeneously using water soluble metal chelates, or can be performed heterogeneously, especially in a continuous fashion using a packed bed reactor, by using suitable water-insoluble metal chelates, especially when supported on appropriate carriers.
Frame Robert R.
Kalnes Tom N.
Moser Mark D.
Macrae & Co.
Uop
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