Liquid purification or separation – Processes – Liquid/liquid solvent or colloidal extraction or diffusing...
Patent
1991-11-21
1993-08-17
Dawson, Robert A.
Liquid purification or separation
Processes
Liquid/liquid solvent or colloidal extraction or diffusing...
210724, 210749, 2103601, 2105121, 210787, 554591, 55460, 209144, 209211, 95258, 95266, 96196, B01D 2126
Patent
active
052365905
ABSTRACT:
A process is disclosed for removing dissolved organics from an aqueous composition, said composition comprising water, carbon dioxide and dissolved organics, and said composition having a pH of 6.5 or less and an inlet organics concentration. The process comprises the steps of feeding said aqueous composition to a centrifugal separation zone, preferably to a hydrocyclone, depressurizing said composition in said centrifugal separation zone to regasify at least a portion of said carbon dioxide. An aqueous product stream is removed from the centrifugal separation zone wherein the concentration of said organics is less than said inlet organics concentration. The process is particularly useful in the cleanup of industrial wastewater, and also for removing organics from water produced in petroleum production operations.
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Evans, J., "High-Pressure Carbon Dioxide Successful in Removing Oil from Brine," Separations Update published by the Center for Energy Studies, Summer 1990-p. 2.
Fair, et al. "Removal of Petroleum Hydrocarbons from Oil-Field Brines by Critical Fluid Extraction," Annual Report 1988 published by the Separations Research Program Center for Energy Studies, Apr. 1090-pp. 42-43.
Little, et al. "Critical Fluid Extraction of Hydrocarbons from Oil-field Brines," published by the Separations Research Program, Early 1990.
Information entitled Agenda SRP Spring Conference, Separations Research Program, Center for Energy Studies, Apr. 10, 1990.
Dubrovsky Michael
Sciamanna Steven F.
Chevron Research and Technology Company
Dawson Robert A.
Reifsnyder David
Sheridan R. J.
Turner W. K.
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