US5019263A
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US
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Membrane composed of a pure molecular sieve
Assignee: ExxonMobil Oil Corp
•
Filing: 1990-06-05
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Granted: 1991-05-28
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Expires: 2010-06-05
Abstract
Abstract A synthetic, non-composited microporous membrane comprises a continuous array of crystalline molecular sieve material. A method is also provided for the preparation of the membrane, and methods are provided for using the membrane as a catalyst, or as a non-catalytic separation membrane for liquid or gaseous mixtures.
Inventors
- 👤 Werner O. Haag
- 👤 John G. Tsikoyiannis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:24
CPC Classifications
B; B01; B01D; B01D71/00; B01D71/02; B01D71/028; B01D71/0281; B01J; B01J19/00; B01J19/18; B01J19/1893; B01J29/00; B01J29/04; B01J29/06; B01J29/40; B01J29/82; B01J29/84; B01J29/85; B01J35/00; B01J35/50; B01J35/58; B01J35/59; C; C01; C01B; C01B13/00; C01B13/02; C01B13/0229; C01B13/0248; C01B13/0251; C01B13/0255; C01B3/00; C01B3/50; C01B3/501; C01B3/503; B01J2219/00; B01J2219/00049; B01J2219/00051; B01J2219/00159; B01J2229/00; B01J2229/60; B01J2229/64; B01J2229/66; C01B2203/00; C01B2203/04; C01B2203/0405; C01B2203/0465; C01B2203/047; C01B2203/048; C01B2210/00; C01B2210/0043; C01B2210/0046
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
13 words
A non-composited, microporous membrane comprising a continuous array of crystalline molecular sieve material.
Claim 2
Dependent Claim
13 words
A non-composited, microporous membrane comprising a continuous array of crystalline molecular sieve material.
Claim 3
Dependent Claim
67 words
The membrane of claim 1 wherein the molecular sieve material has composition in terms of mole ratios of oxides as follows: X.sub.2 O.sub.3 :(n)YO.sub.2 wherein X is a trivalent element selected from the group consisting of aluminum, boron, iron and gallium and combinations thereof; Y is a tetravalent element selected from the group consisting of silicon, germanium, titanium, and combinations thereof; and n is at least 2.
Claim 4
Dependent Claim
13 words
The membrane of claim 2 wherein X is aluminum and Y is silicon.
Claim 5
Dependent Claim
12 words
The membrane of claim 2 wherein the membrane consists essentially of silica.
Claim 6
Dependent Claim
14 words
The membrane of claim 2 wherein n is from about 20 to about 10,000.
Claim 7
Dependent Claim
13 words
The membrane of claim 1 wherein the molecular sieve material is a zeolite.
Claim 8
Dependent Claim
22 words
The membrane of claim 1 wherein the molecular sieve material is selected from the group consisting of aluminophosphates, silicoaluminophosphates, metaloaluminophosphates or metaloaluminophosphosilicates.
Claim 9
Dependent Claim
31 words
The membrane of claim 1 wherein the chemical properties of the membrane are adjusted so that the membrane has low catalytic activity and the membrane has gas or liquid separation properties.
Claim 10
Dependent Claim
24 words
The membrane of claim 8 wherein the catalytic activity of the membrane is reduced by incorporating alkali or alkaline earth metal into the membrane.
Claim 11
Dependent Claim
25 words
The membrane of claim 9 wherein the metal is selected from the group consisting of Mg, Ca, Sr, Ba, Na, K, Li, Rb and Cs.
Claim 12
Dependent Claim
43 words
The membrane of claim 8 wherein the separation properties of the membrane are adjusted by depositing into the membrane a compound selected from the group consisting of metal oxides, phosphorus compounds, silicon compounds, organic compounds, coke and alkali or alkaline earth metal cations.
Claim 13
Dependent Claim
11 words
The membrane of claim 1 wherein the membrane is catalytically active.
Claim 14
Dependent Claim
17 words
The membrane of claim 1 wherein a metal having a catalytic function is incorporated into the membrane.
Claim 15
Dependent Claim
25 words
The membrane of claim 13 wherein the metal function is selected from the group consisting of Pd, Pt, Ru, Mo, W, Ni, Fe and Ag.
Claim 16
Dependent Claim
10 words
The membrane of claim 1 wherein the membrane is monocrystalline.
Claim 17
Dependent Claim
10 words
The membrane of claim 1 wherein the membrane is polycrystalline.
Claim 18
Dependent Claim
21 words
The membrane of claim 1 wherein the thickness dimension of the membrane is from about 0.1 μ to about 400 μ.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-05-27 | 1994-11-26 | 1995-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-05-27 | 1998-11-26 | 1999-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-05-27 | 2002-11-26 | 2003-05-28 | $7700.00 | Window Closed / Lapsed |