Method for recovering water soluble surfactants

Details Method for recovering water soluble surfactants Method for recovering water soluble surfactants

2006-04-25

2006-04-25

Drodge, Joseph (Department: 1723)

Liquid purification or separation

Processes

Liquid/liquid solvent or colloidal extraction or diffusing...

C166S267000, C166S305100, C210S634000, C210S708000, C210S747300

Reexamination Certificate

active

07033504

ABSTRACT:
Disclosed is a method for recovering and re-employing ionic surfactants from solutions, dispersions and emulsions of water and liquid hydrocarbons, by the addition of a second non-aqueous polar phase and an inorganic salt which changes the ionic strength of the surfactant and causes the surfactant to partition principally into the non-aqueous second polar phase. More specifically, the method applies to recovering hydrate growth inhibitor/modifying compounds, with cationic surfactants such as ammonium, phosphonium and sulphonium alkylated compounds from the effluent of hydrocarbon production wells; the effluent including water, hydrate inhibitor compound, at least one additional polar solvent and inorganic salt. Sufficient additional ions of inorganic salt, and if necessary, an alcohol/glycol are added to the effluent to form a second polar phase that is less polar than the aqueous phase, into which the hydrate inhibitor can then dissolve and be separated from the effluent.

REFERENCES:
patent: 4029570 (1977-06-01), Coffman et al.
patent: 4216079 (1980-08-01), Newcombe
patent: 4494604 (1985-01-01), Shaw et al.
patent: 5460728 (1995-10-01), Klomp et al.
patent: 5632336 (1997-05-01), Notz et al.
patent: 5648575 (1997-07-01), Klomp et al.
patent: 5877361 (1999-03-01), Rojey et al.
patent: 5879561 (1999-03-01), Klomp et al.
patent: 6093862 (2000-07-01), Sinquin et al.
patent: 0 442 767 (1991-01-01), None
patent: 93/25798 (1993-12-01), None
patent: 95 17579 (1995-06-01), None
patent: 96 34177 (1996-10-01), None

Affiliated with

Also associated with

Rating

Method for recovering water soluble surfactants does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method for recovering water soluble surfactants, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for recovering water soluble surfactants will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3533553