Liquid purification or separation – Processes – Making an insoluble substance or accreting suspended...
Patent
1997-04-22
2000-09-12
Hruskoci, Peter A.
Liquid purification or separation
Processes
Making an insoluble substance or accreting suspended...
210708, 210709, 210725, 210727, 210911, 210914, 423 87, 423101, C02F 158
Patent
active
061173339
ABSTRACT:
A process is disclosed which involves removing hydrocarbons, arsenic and mercury from wastewater produced in oil and gas fields. An oxidant, ferric ions, and flocculent are sequentially added to the wastewater to form a removable sludge containing the arsenic, hydrocarbon, and mercury contaminants. The Oxidation-Reduction Potential of the wastewater is controlled by oxidant addition to allow the required arsenic oxidation to occur while maintaining the mercury in elemental form. The process requires relatively short residence times between chemical additions and provides for large wastewater throughputs. The cleaned wastewater is suitable for discharge to the environment.
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Frankiewicz Theodore C.
Gerlach John
Finkle Yale S.
Hruskoci Peter A.
Thompson Alan H.
Union Oil Company of California
Wirzbicki Gregory F.
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