Method for clarifying wastewater containing surfactants

Details Method for clarifying wastewater containing surfactants Method for clarifying wastewater containing surfactants

1993-11-17

1995-07-18

Hruskoci, Peter A.

Liquid purification or separation

Processes

Making an insoluble substance or accreting suspended...

166267, 208188, 210727, 210730, 210712, 252338, 252358, B01D 1705

Patent

active

054338638

ABSTRACT:
A method and apparatus for recovering oil and clarifying waste water from an oil field are disclosed. The method includes the step of treating the waste water with an aqueous de-emulsifying agent comprising wattle tannin, an inorganic coagulant and a synthetic polymer flocculant to destabilize the oil emulsion and rapidly agglomerate the oil particles formed thereby. Efficiency of the present de-emulsifying agent permits use of flotation equipment for rapid clean-up of the waste water and obviates the need for large settling pits.

REFERENCES:
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patent: 4588508 (1986-05-01), Allenson et al.
patent: 4781839 (1988-11-01), Kelly et al.
patent: 4818410 (1989-04-01), Bellos et al.
patent: 5045212 (1991-09-01), Augustin et al.
patent: 5176847 (1993-01-01), Kremer
patent: 5256304 (1993-10-01), Meyer et al.
Tomita, Shigeru, Yosui to Haisui (Japan) 28 (10), pp. 1024-1034 (1986) (abstract).

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