US4690750A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Micro-porous superlattice separations
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1986-06-13
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Granted: 1987-09-01
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Expires: 2006-06-13
Abstract
Abstract A high surface area substrate with controlled pore size and slot geometry is used in an adsorbing process. The material is made by depositing at least two materials in alternating layers. The film is then broken up and one of the materials is etched away to produce a slotted surface structure. These slots can add size and shape selectivity to separations and catalytic processes which because of the uniform and controllable dimensions (>5A) would be superior to that obtainable from zeolites and clays.
Inventors
- 👤 Charles B. Roxlo
- 👤 Harry W. Deckman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:06
CPC Classifications
B; B01; B01J; B01J20/00; B01J20/30; B01D; B01D15/00; B01D15/08; B01D53/00; B01D53/02; B01D53/04; B01D53/0407; B01J20/02; B01J20/10; B01J20/103; C; C07; C07C; C07C7/00; C07C7/12; B01D2253/00; B01D2253/10; B01D2253/106; B01D2253/116; B01D2253/30; B01D2253/302; B01D2253/308; B01D2257/00; B01D2257/70; B01D2257/702; B01D2257/7022; B01D2257/7027; B01D2259/00; B01D2259/40; B01D2259/414; B01D2259/4141; B01D2259/4145; G; G01; G01N; G01N30/00; G01N30/02; G01N30/50; G01N30/52; G01N2030/524; G01N2030/525; Y; Y10; Y10S; Y10S148/00; Y10S148/16
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
49 words
A process for absorbing a molecular species from a medium of a liquid or a gas comprising contacting said medium with a superlattice which includes multilayered material having layers which extend laterally with different dimensions so as to provide two dimensional slots between said layers within said multilayered material.
Claim 2
Dependent Claim
49 words
A process for absorbing a molecular species from a medium of a liquid or a gas comprising contacting said medium with a superlattice which includes multilayered material having layers which extend laterally with different dimensions so as to provide two dimensional slots between said layers within said multilayered material.
Claim 3
Dependent Claim
11 words
The process of claim 1 wherein said molecular species is organic.
Claim 4
Dependent Claim
12 words
The process of claim 2 wherein said molecular species is a hydrocarbon.
Claim 5
Dependent Claim
11 words
The process of claim 3 wherein said molecular species is aromatic.
Claim 6
Dependent Claim
24 words
The process of claim 2 wherein said molecular species is selected from the group consisting of tetracene, pyrene, anthracene, napthalene, rubene and dipyrenyl decane.
Claim 7
Dependent Claim
16 words
The process of claim 1 wherein said contacting step separates a molecular species from said medium.
Claim 8
Dependent Claim
21 words
The process of claim 6 further comprising the step of removing said superlattice from said medium thereby removing said molecular species.
Claim 9
Dependent Claim
11 words
The process of claim 7 wherein said absorption is shape selective.
Claim 10
Dependent Claim
11 words
The process of claim 7 wherein said absorption is size selective.
Claim 11
Dependent Claim
23 words
The process of claim 9 wherein a smaller molecule is separated from a larger molecule by the smaller molecule preferentially entering said slots.
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) | 1990-08-31 | 1991-03-02 | 1991-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-08-31 | 1995-03-02 | 1995-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-08-31 | 1999-03-02 | 1999-09-01 | $7700.00 | Window Closed / Lapsed |