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US4360448A Expired / Lapsed US ⏱️ 0.0 years remaining

Water in oil emulsions useful in liquid membrane

Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1973-10-09
•
Granted: 1982-11-23
•
Expires: 1993-10-09
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Abstract

Abstract This invention relates to a process for the removal of dissolved species from aqueous solutions, which comprises contacting said aqueous solution with an emulsion, said emulsion comprising an exterior phase which is characterized as being immiscible with said aqueous solution and yet permeable to said dissolved species, and an interior phase which contains a reactant capable of converting said dissolved species to a nonpermeable form. The dissolved species permeate the exterior phase, into the interior phase where they are converted into nonpermeable forms and thus retained in the interior phase of said emulsion. The aqueous solution, depleted in said dissolved species, is separated from said emulsion and the emulsion cycled for reuse. In one preferred embodiment said dissolved species are ions, and an ion exchange compound is incorporated in the exterior phase of the emulsion, to promote the permeation of said ions through the exterior phase.

Inventors

  • 👤 Norman N. Li
  • 👤 Robert P. Cahn
  • 👤 Adam L. Shrier

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-30 13:47
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/26; B; B01; B01D; B01D61/00; B01D61/38; B01D61/40; C10; C10G; C10G21/00; C10G31/00; C10G31/11

Claims Analysis

Total Claims: 6
Claim 1
Independent Claim 193 words
A water-in-oil emulsion, useful in liquid membrane processes, comprising a nonionic oil soluble surfactant, present at from 0.01 to 10 weight % of said emulsion, an oil soluble ion exchange compound in the exterior phase, said oil soluble ion exchange compound being present at from 5 to 75 weight % of said emulsion and selected from compounds having the general formula: ##STR6## wherein R and R 1 are independently selected from the group consisting of hydrogen, C 1 to C 20 alkyl, C 6 to C 20 aryl and C 7 to C 20 alkaryl radicals and R 2 is selected from the group consisting of C 6 to C 30 alkyl, C 6 to C 20 aryl and C 7 to C 20 alkaryl radicals; and ##STR7## wherein R 3 , R 4 , R 5 , R 6 , R 7 , R 8 , R 9 and y are independently selected from the group consisting of hydrogen, C 1 to C 20 alkyl, C 6 to C 20 aryl, C 7 to C 20 alkaryl radicals and substituted derivatives thereof, and x is an integer of from 1 to 100.
Claim 2
Dependent Claim 193 words
A water-in-oil emulsion, useful in liquid membrane processes, comprising a nonionic oil soluble surfactant, present at from 0.01 to 10 weight % of said emulsion, an oil soluble ion exchange compound in the exterior phase, said oil soluble ion exchange compound being present at from 5 to 75 weight % of said emulsion and selected from compounds having the general formula: ##STR6## wherein R and R 1 are independently selected from the group consisting of hydrogen, C 1 to C 20 alkyl, C 6 to C 20 aryl and C 7 to C 20 alkaryl radicals and R 2 is selected from the group consisting of C 6 to C 30 alkyl, C 6 to C 20 aryl and C 7 to C 20 alkaryl radicals; and ##STR7## wherein R 3 , R 4 , R 5 , R 6 , R 7 , R 8 , R 9 and y are independently selected from the group consisting of hydrogen, C 1 to C 20 alkyl, C 6 to C 20 aryl, C 7 to C 20 alkaryl radicals and substituted derivatives thereof, and x is an integer of from 1 to 100.
Claim 3
Dependent Claim 47 words
The emulsion of claim 1 wherein R 5 , R 6 , R 7 , R 8 and R 9 are hydrogen, x varies from 3 to 20 and said substituted derivatives are chosen from the group consisting of oxygen, nitrogen, sulfur, phosphorus and halogen containing derivatives.
Claim 4
Dependent Claim 58 words
The emulsion of claim 2, wherein R 3 and R 4 together form an alkyl succinic radical having the general formula ##STR8## wherein m is an integer varying from 10 to 60, x varies from 3 to 10, and y is selected from the group consisting of hydrogen and oxygen containing hydrocarbyl radicals having up to 10 carbons.
Claim 5
Dependent Claim 21 words
The emulsion of claim 1, wherein said aqueous interior phase comprises a calcium salt which is at least partially soluble therein.
Claim 6
Dependent Claim 12 words
The emulsion of claim 4 wherein said salt is CaCl 2 .

References Cited (Backward Citations)

US2299693A Cited
US3057804A Cited
US3714062A Cited
US3719590A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1985-11-22 1986-05-24 1986-11-23 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1989-11-22 1990-05-24 1990-11-23 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1993-11-22 1994-05-24 1994-11-23 $7700.00 Window Closed / Lapsed

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