Liquid purification or separation – Processes – Liquid/liquid solvent or colloidal extraction or diffusing...
Patent
1986-04-21
1988-03-08
Fisher, Richard V.
Liquid purification or separation
Processes
Liquid/liquid solvent or colloidal extraction or diffusing...
210634, 210909, C02F 126
Patent
active
047298324
ABSTRACT:
The invention relates to a method for substantially reducing the concentration of coal tar based contaminants in waste water streams. The method comprises first forming an intimate mixture of the waste water stream to be treated with at least one coal tar based extractant. The intimate mixture then is subjected to an extraction temperature sufficient to reduce the concentration of the contaminant in the waste water stream to its equilibrium concentration as the extraction temperature employed. Finally, the mixture is separated and a treated waste water stream recovered which is characterized by a substantially reduced and constant concentration of the contaminants and a substantially reduced biological demand.
REFERENCES:
patent: 2808375 (1957-10-01), Manka
Encyclopedia of Chemical Technology, Kirk-Othmer, vol. 19, 2nd ed., 1969, pp. 554-564, 668, 671-675.
Weesner, C. W., et al., Reducing Phenol Wastes from Coke Plants, Steel Industry Action Committee of the Ohio River Valley Water Sanitation Commission, 1953, pp. 1-26.
D. G. Murdoch and M. Cuckney "The Removal of Phenols from Gas Works Ammoniacal Liquor", Oct. 8, 1946.
B. K. Wallin, A. J. Condren and R. L. Walden, "Removal of Phenolic Compounds from Wood Preserving Waste Waters", Apr. 1981.
G. A. Lorton, "Removal of Phenols from Process Condensate", Oct. 1977.
Clinton Darrell W.
Leonard Robert E.
Addison William G.
Fisher Richard V.
Kerr-McGee Chemical Corporation
Peterson Jeffrey W.
Ward John P.
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