Method of extracting and reutilizing surfactants from emulsions

Details Method of extracting and reutilizing surfactants from emulsions Method of extracting and reutilizing surfactants from emulsions

1983-12-07

1985-05-21

Guynn, Herbert B.

Wells

Processes

Separating material entering well

208188, 252 855D, E21B 4322, E21B 4340

Patent

active

045180385

ABSTRACT:
The disclosed invention is a one step or two step process for extracting surfactant from produced emulsions of oil, water and surfactants, concentrating the surfactants into a relatively small volume emulsion middle phase that can be reutilized in surfactant flooding and separating substantial quantities of salable oil from the emulsions.
In the two step process, a sulfonated alkyl benzene is added and mixed with the emulsion, which partitions upon settlement into three phases, a clean oil phase, a first microemulsion middle phase and an aqueous phase. An ethoxylated phenol is then added and mixed to the first middle phase to yield at least two more similar phases with the middle phase containing the concentrated surfactants. Alternately, the sulfonated alkyl benzene and the ethoxylated phenol can be combined and added in a one step extraction process.

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patent: 4235712 (1980-11-01), McClaflin
patent: 4261812 (1981-04-01), Newcombe
patent: 4277352 (1981-07-01), Allison et al.
patent: 4370238 (1983-01-01), Tackett, Jr.

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