US3719590A
Expired / Lapsed
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Liquid membrane system for separation of components of liquid mixtures
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1970-12-17
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Granted: 1973-03-06
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Expires: 1990-12-17
Abstract
Abstract This invention relates to a separation process. Specifically, it pertains to the separation of elements of a mixture by selective permeation through a liquid surfactant membrane, which comprises one or more surface active agents, and an additive which selectively increases the solubility of at least one component of the mixture in the liquid membrane, into a solvent phase which may be a solvent for all elements. In a preferred embodiment, hexene-1 is separated from heptane, by use of a liquid surfactant membrane comprising at least 0.2 percent of a Saponin extract as the surface active agent, from 5 percent to 30 percent cuprous ammonium acetate as the solubility increasing additive, and the balance water.
Inventors
- 👤 N Li
- 👤 R Cahn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:16
CPC Classifications
C; C10; C10G; C10G31/00; C10G31/11; B; B01; B01D; B01D61/00; B01D61/38; B01D61/40; C02; C02F; C02F1/00; C02F1/26; C02F1/66; C07; C07C; C07C7/00; C07C7/144; C10G21/00
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
120 words
A process for separating olefins from admixture with other hydrocarbons which comprises: a. forming droplets of said mixture; b. coating said droplets with an aqueous solution, which comprises a surfactant and a solubilizing additive selected from the group consisting of cuprous ammonium acetate, thiourea, sulfuric acid, C1 to C10 nitriles, C1 to C10 sulfones, and C1 to C10 amides, said aqueous solution forming liquid surfactant membranes around said droplets which allows selective permeation of said olefin, and c. contacting said liquid surfactant membrane coated droplets with a solvent selective for said olefin, whereby at least a portion of said olefin passes through said membrane into said solvent and at least a portion of said other hydrocarbons remains within said droplet.
Claim 2
Dependent Claim
120 words
A process for separating olefins from admixture with other hydrocarbons which comprises: a. forming droplets of said mixture; b. coating said droplets with an aqueous solution, which comprises a surfactant and a solubilizing additive selected from the group consisting of cuprous ammonium acetate, thiourea, sulfuric acid, C1 to C10 nitriles, C1 to C10 sulfones, and C1 to C10 amides, said aqueous solution forming liquid surfactant membranes around said droplets which allows selective permeation of said olefin, and c. contacting said liquid surfactant membrane coated droplets with a solvent selective for said olefin, whereby at least a portion of said olefin passes through said membrane into said solvent and at least a portion of said other hydrocarbons remains within said droplet.
Claim 3
Dependent Claim
11 words
The process of claim 1 wherein said other hydrocarbons are alkanes.
Claim 4
Dependent Claim
19 words
The process of claim 2 wherein said admixture is emulsified in the aqueous solution to from the coated droplets.
Claim 5
Dependent Claim
22 words
The process of claim 3 wherein said solubilizing additive is selected from the group consisting of sulfuric acid, and cuprous ammonium acetate.
Claim 6
Dependent Claim
13 words
The process of claim 4 wherein said solubilizing additive is cuprous ammonium acetate.
Claim 7
Dependent Claim
12 words
The process of claim 5 whErein said surfactant comprises a saponin extract.
Claim 8
Dependent Claim
30 words
The process of claim 1 wherein the solubilizing additive comprises from 0.1 to 90 percent and the surfactant comprises at least 0.2 percent by weight of the liquid surfactant membrane.
Claim 9
Dependent Claim
109 words
A process for separating diolefins from admixture with other hydrocarbons which comprises: a. forming droplets of said mixture; b. coating said droplets with an aqueous solution which comprises a surfactant and a solubilizing additive selected from the group consisting of dimethylacetamide, dimethylformamide, cuprous ammonium acetate, acetonitrile and N-methylpyrrolidone, said aqueous solution forming liquid surfactant membranes around said droplets which allows selective permeation of said diolefin and, c. contacting said liquid surfactant membrane coated droplets with a solvent selective for said diolefin, whereby at least a portion of said diolefin passes through said membrane into said solvent and at least a portion of said other hydrocarbons remains within said droplet.
Claim 10
Dependent Claim
109 words
A process for separating diolefins from admixture with other hydrocarbons which comprises: a. forming droplets of said mixture; b. coating said droplets with an aqueous solution which comprises a surfactant and a solubilizing additive selected from the group consisting of dimethylacetamide, dimethylformamide, cuprous ammonium acetate, acetonitrile and N-methylpyrrolidone, said aqueous solution forming liquid surfactant membranes around said droplets which allows selective permeation of said diolefin and, c. contacting said liquid surfactant membrane coated droplets with a solvent selective for said diolefin, whereby at least a portion of said diolefin passes through said membrane into said solvent and at least a portion of said other hydrocarbons remains within said droplet.
Claim 11
Dependent Claim
19 words
The process of claim 8 wherein said admixture is emulsified in the aqueous solution to form the coated droplets.
Claim 12
Dependent Claim
30 words
The process of claim 9 wherein the solubilizing additive comprises from 0.1 to 90 percent and the surfactant comprises at least 0.2 percent by weight of the liquid surfactant membrane.
Claim 13
Dependent Claim
18 words
The process of claim 10 wherein said diolefin comprises butadiene and said other hydrocarbons comprise butenes and butanes.
Claim 14
Dependent Claim
36 words
The process of claim 10 wherein said diolefin is isoprene, said other hydrocarbons comprise lower unsaturated C5 hydrocarbons and said solubilizing additive comprises compounds selected from the group consisting of dimethylacetamide, dimethylformamide, acetonitrile, and N-methyl pyrollidone.
Claim 15
Dependent Claim
105 words
A process for separating aromatics from admixture with other hydrocarbons which comprises: a. forming droplets of said mixture; b. coating said droplets with an aqueous solution, which comprises a surfactant and a solubilizing additive selected from the group consisting of sulfolane and sulfuric acid, said aqueous solution forming liquid surfactant membranes around said droplets which allows selective permeation of said aromatic, and c. contacting said liquid surfactant membrane coated droplets with a solvent selective for said aromatic, whereby at least a portion of said aromatic passes through said membrane into said solvent and at least a portion of said other hydrocarbons remains within said droplet.
Claim 16
Dependent Claim
105 words
A process for separating aromatics from admixture with other hydrocarbons which comprises: a. forming droplets of said mixture; b. coating said droplets with an aqueous solution, which comprises a surfactant and a solubilizing additive selected from the group consisting of sulfolane and sulfuric acid, said aqueous solution forming liquid surfactant membranes around said droplets which allows selective permeation of said aromatic, and c. contacting said liquid surfactant membrane coated droplets with a solvent selective for said aromatic, whereby at least a portion of said aromatic passes through said membrane into said solvent and at least a portion of said other hydrocarbons remains within said droplet.
Claim 17
Dependent Claim
19 words
The process of claim 13 wherein said admixture is emulsified in the aqueous solution to form the coated droplets.
Claim 18
Dependent Claim
30 words
The process of claim 14 wherein the solubilizing additive comprises from 0.1 to 90 percent and the surfactant comprises at least 0.2 percent by weight of the liquid surfactant membrane.
Claim 19
Dependent Claim
19 words
The process of claim 15 wherein said other hydrocarbons comprise paraffins and olefins and said solubilizing additive is sulfolane.
Claim 20
Dependent Claim
21 words
The process of claim 15 wherein said aromatic is a C6 to C20 aromatic and said solubilizing additive is sulfuric acid.
Claim 21
Dependent Claim
109 words
A process for separating Alpha -acetylenes from admixture with other hydrocarbons which comprises: a. forming droplets of said mixture; b. coating said droplets with an aqueous solution, which comprises a surfactant and a solubilizing additive selected from the group consisting of sodium and potassium hydroxide, said aqueous solution forming liquid surfactant membranes around said droplets which allows selective permeation of said Alpha -acetylenes, and c. contacting said liquid surfactant membrane coated droplets with a solvent selective for said Alpha -acetylenes, whereby at least a portion of said Alpha -acetylenes passes through said membrane into said solvent and at least a portion of said other hydrocarbons remains within said droplet.
Claim 22
Dependent Claim
109 words
A process for separating Alpha -acetylenes from admixture with other hydrocarbons which comprises: a. forming droplets of said mixture; b. coating said droplets with an aqueous solution, which comprises a surfactant and a solubilizing additive selected from the group consisting of sodium and potassium hydroxide, said aqueous solution forming liquid surfactant membranes around said droplets which allows selective permeation of said Alpha -acetylenes, and c. contacting said liquid surfactant membrane coated droplets with a solvent selective for said Alpha -acetylenes, whereby at least a portion of said Alpha -acetylenes passes through said membrane into said solvent and at least a portion of said other hydrocarbons remains within said droplet.
Claim 23
Dependent Claim
19 words
The process of claim 18 wherein said admixture is emulsified in the aqueous solution To form the coated droplets.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-03-05 | 1976-09-04 | 1977-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-05 | 1980-09-04 | 1981-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-05 | 1984-09-04 | 1985-03-06 | $7700.00 | Window Closed / Lapsed |