Methods of recovering arsenic values from waste

Details Methods of recovering arsenic values from waste Methods of recovering arsenic values from waste

C - Chemistry, Metallurgy

22

B

53/176

C22B 30/04 (2006.01) C22B 5/16 (2006.01)

Patent

CA 1314149

ABSTRACT A process for the recovery of arsenic values from arsenic containing material which may also contain sulphur, the process comprising the step of evaporating the arsenic values from the arsenic containing material into a gas stream which gas stream does not react with the arsenic values. A process for the recovery of arsenic values from arsenic containing material which may also contain sulphur, the process utilizing electrical energy for evaporation of arsenic trioxide in an evaporator into a gas stream and after separation of arsenic trioxide and any residue, the clean gas may be recycled to the evaporator thus minimizing possible emissions permitting the process to be carried out in a closed circuit thus substantially eliminating emissions.

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