US5069794A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Separation of mixture components over membrane composed of a pure molecular sieve
Assignee: ExxonMobil Oil Corp
•
Filing: 1991-03-25
•
Granted: 1991-12-03
•
Expires: 2011-03-25
Abstract
Abstract A process is provided for separation of components of a gaseous or liquid mixture which comprises contacting the mixture with a synthetic, non-composited microporous membrane comprising a continuous array of crystalline molecular sieve material.
Inventors
- 👤 Werner O. Haag
- 👤 John G. Tsikoyiannis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:00
CPC Classifications
B; B01; B01D; B01D67/00; B01D67/0081; B01D67/0083; 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; B01D2323/00; B01D2323/12; B01J2219/00; B01J2219/00049; B01J2219/00051; B01J2219/00159; B01J2229/00; B01J2229/60; B01J2229/64; B01J2229/66; C01B2203/00; C01B2203/04; C01B2203/0405; C01B2203/041; C01B2203/0465; C01B2203/047; C01B2203/048; C01B2210/00; C01B2210/0043; C01B2210/0046
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
99 words
A process for the separation of components of a gaseous or liquid mixture having at least two components which comprises contacting a feedstream of the mixture with an upstream face of a non-composited, microporous membrane comprising a continuous array of crystalline molecular sieve material under separation conditions such that at least one component of the mixture has a greater steady state permeability through the membrane than at least one of the remaining components of the mixture, and recovering the component having the greater permeability on the downstream side of the membrane after contact with and passage through the membrane.
Claim 2
Dependent Claim
99 words
A process for the separation of components of a gaseous or liquid mixture having at least two components which comprises contacting a feedstream of the mixture with an upstream face of a non-composited, microporous membrane comprising a continuous array of crystalline molecular sieve material under separation conditions such that at least one component of the mixture has a greater steady state permeability through the membrane than at least one of the remaining components of the mixture, and recovering the component having the greater permeability on the downstream side of the membrane after contact with and passage through the membrane.
Claim 3
Dependent Claim
23 words
The process of claim 1 wherein the chemical properties of the membrane have been adjusted so that the membrane has low catalytic activity.
Claim 4
Dependent Claim
21 words
The process of claim 1 wherein the membrane has been treated by incorporating alkali or alkaline earth metal into the membrane.
Claim 5
Dependent Claim
25 words
The process of claim 3 wherein the metal is selected from the group consisting of Mg, Ca, Sr, Ba, Na, K, Li, Rb and Cs.
Claim 6
Dependent Claim
40 words
The process of claim 1 wherein the membrane has been treated 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 7
Dependent Claim
13 words
The process of claim 1 wherein the gaseous mixture comprises oxygen and nitrogen.
Claim 8
Dependent Claim
14 words
The process of claim 1 wherein the gaseous mixture comprises hydrogen and carbon monoxide.
Claim 9
Dependent Claim
13 words
The process of claim 1 wherein the gaseous mixture comprises hydrogen and methane.
Claim 10
Dependent Claim
17 words
The process of claim 1 wherein the liquid mixture comprises a linear paraffin and a branched paraffin.
Claim 11
Dependent Claim
15 words
The process of claim 1 wherein the liquid mixture comprises p-xylene and m- and/or o-xylene.
Claim 12
Dependent Claim
11 words
The process of claim 1 wherein the membrane has been calcined.
Claim 13
Dependent Claim
30 words
The process of claim 1 wherein the membrane has been steamed at a temperature of from about 200° C. to about 800° C. for from about 1 to 50 hours.
Claim 14
Dependent Claim
13 words
The process of claim 1 wherein said molecular sieve material comprises a zeolite.
Claim 15
Dependent Claim
17 words
The process of claim 1 wherein said molecular sieve material comprises an aluminophosphate, silicoaluminophosphate, metaloaluminophosphate or metaloaluminophosphosilicate.
Claim 16
Dependent Claim
14 words
The process of claim 1 wherein said molecular sieve material consists essentially of silica.
Claim 17
Dependent Claim
68 words
The process of claim 1 wherein said 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 about 2.
Claim 18
Dependent Claim
13 words
The process of claim 16 wherein X comprises aluminum and Y comprises silicon.
Claim 19
Dependent Claim
14 words
The process of claim 16 wherein n is from about 20 to about 10,000.
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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) | 1994-12-02 | 1995-06-03 | 1995-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-12-02 | 1999-06-03 | 1999-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-12-02 | 2003-06-03 | 2003-12-03 | $7700.00 | Window Closed / Lapsed |