Patent US3650091A successfully refreshed from Google Patents.
US3650091A
Expired / Lapsed
US
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Liquid membrane foam diffusion
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1969-04-22
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Granted: 1972-03-21
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Expires: 1989-04-22
Abstract
Abstract A gaseous mixture is passed through a layer of liquid surfactant membrane; gradually, a foam of bubbles is generated. The bubbles are coated with liquid membrane and have an interior of the gaseous mixture. Component(s) of the mixture permeate more rapidly through the membrane and pass into the foam. To remove the more rapidly permeating components an inert gas is passed through the foam; the inert gas entrains the more rapidly permeating components and serves to transport it out of the system.
Inventors
- 👤 Norman N Li
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:31
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/22; B01D53/228; B01D61/00; B01D61/38; B01D61/40; C; C01; C01B; C01B3/00; C01B3/50; C01B3/501; C01B3/503; C07; C07C; C07C7/00; C07C7/144; C01B2203/00; C01B2203/04; C01B2203/0405; C01B2203/0465; C01B2203/0475; C01B2203/048
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
10 words
The process of claim 1 wherein said mixture is hydrocarbon.
Claim 2
Dependent Claim
10 words
The process of claim 1 wherein said surfactant is cationic.
Claim 3
Dependent Claim
26 words
The process of claim 1 wherein the carrier gas after separation from the foam is compressed to separate the more permeable component from said carrier gas.
Claim 4
Dependent Claim
15 words
The process of claim 1 wherein said mixture comprises C1 to C4 paraffins and olefins.
Claim 5
Dependent Claim
13 words
The process of claim 1 wherein said mixture comprises inorganic compounds and hydrocarbons.
Claim 6
Dependent Claim
116 words
A process for separating components of a gaseous mixture which comprises passing said mixture through a liquid surfactant solution whereby bubbles of said mixture are formed having a surfactant coating, said surfactant coating allowing at least one component of said mixture to permeate more rapidly than at least one other component, forming a froth comprised of said bubbles wherein at least a portion of said permeating gas passes into said froth, passing an inert carrier gas through said froth wherein said perMeable component is entrained in said inert carrier gas, separating said inert carrier gas and said entrained permeating gas from said froth, then collapsing said foam and recovering the less permeable component of said mixture.
Claim 7
Dependent Claim
11 words
The process of claim 7 wherein said inert gas is nitrogen.
Claim 8
Dependent Claim
11 words
The process of claim 7 wherein said mixture comprises two isomers.
Claim 9
Dependent Claim
11 words
The process of claim 7 wherein said inert gas is air.
Claim 10
Dependent Claim
13 words
The process of claim 7 wherein said mixture comprises normal and iso compounds.
Claim 11
Dependent Claim
15 words
The process of claim 7 wherein said mixture comprises C1 to C4 olefins and paraffins.
Claim 12
Dependent Claim
10 words
The process of claim 7 wherein said surfactant is anionic.
Claim 13
Dependent Claim
10 words
The process of claim 7 wherein said surfactant is cationic.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-03-21 | 1975-09-20 | 1976-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-03-21 | 1979-09-20 | 1980-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-03-21 | 1983-09-20 | 1984-03-21 | $7700.00 | Window Closed / Lapsed |