Liquid purification or separation – Processes – Chemical treatment
Patent
1993-09-09
1994-11-01
McCarthy, Neil
Liquid purification or separation
Processes
Chemical treatment
210762, 210904, 210908, 210916, 210903, C02F 172
Patent
active
053605527
ABSTRACT:
Waste water chemical oxygen demand is reduced from a waste water by passing the water in the presence of an oxidizing agent through an adsorbent porous solid substrate, preferably zeolite A, zeolite X, zeolite Y, ZSM-5, erionite, or chabazite which has been partially ion exchanged with a water insoluble metal compound, copper (Cu), that cataytically facilitates oxidation of the offensive substances or the components in the waste water that increase its chemical oxygen demand, such as cyanide, sulfide, thiosulfate, sulfite, mercaptan, or disulfide. The preferred oxidizing agent is air. It is desired to develop a process for waste water treatment that is effective at reducing the concentration of the offensive substances in the waste water while minimizing the deposition of undesirable residues into the treated waste water. This process is effective in treating waste water from industrial plants, including petroleum refineries, chemical plants, pulp and paper plants, mining operations, food processing plants, and electroplating operations to reduce the concentration of the offensive substances while minimizing deposition of undesirable residues into the treated waste water.
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Harris G. L.
McCarthy Neil
McKillop A. J.
Mobil Oil Corporation
Santini D. P.
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