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US5207909A
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Plasma polymer membrane (C-2564)
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1992-03-25
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Granted: 1993-05-04
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Expires: 2012-03-25
Abstract
Abstract The present invention is a membrane for separating aromatics from feeds which are mixtures of aromatics and saturates and for separating saturated linear hydrocarbons from feeds which are mixtures of saturated linear and saturated branched hydrocarbons. The membrane is a plasma polymer formed from plasma polymerizing monomers. In a preferred embodiment, the membrane is a plasma polymer film formed from plasma polymerizing the monomer 2,4 pentane dione.
Inventors
- 👤 Benjamin Abeles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 09:13
CPC Classifications
B; B01; B01D; B01D69/00; B01D69/12; B01D69/125; B01D69/127; C; C07; C07C; C07C7/00; C07C7/144; C08; C08F; C08F2/00; C08F2/58
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
56 words
A membrane for separating at least one component selected from the group consisting of an aromatic and linear hydrocarbons, from organic feeds comprising a plasma polymer formed from plasma polymerizing monomers which contain functional groups selected from the group consisting of C--Cl, C--F, and C═O, having polarity so as to separate said component from said feed.
Claim 2
Dependent Claim
56 words
A membrane for separating at least one component selected from the group consisting of an aromatic and linear hydrocarbons, from organic feeds comprising a plasma polymer formed from plasma polymerizing monomers which contain functional groups selected from the group consisting of C--Cl, C--F, and C═O, having polarity so as to separate said component from said feed.
Claim 3
Dependent Claim
37 words
The membrane of claim 1 wherein said component is an aromatic and said feeds are a mixture of aromatics and saturates and said membrane includes a plasma polymer formed from plasma polymerizing the monomer 2-4 pentane dione.
Claim 4
Dependent Claim
21 words
The membrane of claim 1 wherein said component is an aromatic and said feeds are a mixture of aromatics and saturates.
Claim 5
Dependent Claim
52 words
The membrane of claim 1 wherein said component is a saturated linear hydrocarbon and said feeds are mixtures of saturated linear and saturated branched hydrocarbons and said membrane includes a plasma polymer formed from plasma polymerizing monomers which contain functional groups that have a larger attractive energy for linears than for branched.
Claim 6
Dependent Claim
40 words
The membrane of claim 1 wherein said component is a linear hydrocarbon and said feeds are mixtures of saturated linear and saturated branched hydrocarbons and said membrane includes a plasma polymer formed from plasma polymerizing the monomer 2-4 pentane dione.
Claim 7
Dependent Claim
25 words
The membrane of claim 1 wherein said component is a saturated linear hydrocarbon and said feeds are mixtures of saturated linear and branched linear hydrocarbons.
Claim 8
Dependent Claim
48 words
A membrane of claim 1 wherein said component is a saturated linear hydrocarbon and said feeds are mixtures of saturated linear and saturated branched hydrocarbons, and said membrane includes a plasma polymer in which the diffusion coefficient for the linear molecules is larger then for the branched molecules.
Claim 9
Dependent Claim
28 words
The plasma polymerized membrane of claim 1 wherein said membrane has its permeability and selectivity increased by the forming process which consists of pervaporating toluene through the membrane.
Claim 10
Dependent Claim
31 words
The plasma polymerized membrane of claim 1 wherein said membrane has its permeability and selectivity increased by the forming process in which the membrane is placed for several hours in toluene.
References Cited (Backward Citations)
US4876294A
Cited
US4974659A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-05-03 | 1996-11-02 | 1997-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-05-03 | 2000-11-02 | 2001-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-05-03 | 2004-11-02 | 2005-05-04 | $7700.00 | Window Closed / Lapsed |