EP0160435A2
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A polyphenylene ether membrane used for gas separation
Assignee: Mitsubishi Gas Chemical Co Inc
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Filing: 1985-04-10
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Granted: —
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Expires: 2005-04-10
Abstract
Abstract A membrane for gas separation is made of a silylated polyphenylene ether containing a unit having in at least a part of its repeating unit an organosilane or siloxane group represented by the formula: wherein R,, R 2 , R 3 and R 4 each represent hydrogen or a group of the formula -Si(R 5 )(R 6 )(R 7 ), wherein R 5 , R 6 and R 7 each is alkyl, 1 and n each = 0, 1, 2 or 3; and m = 1, 2 or 3; provided that R 1 , R 2 , R 3 and R 4 are not all hydrogen. The membrane may be supported on a porous thin support. The ether is provided by reacting a polyphenylene ether with an alkali metal agent and then with a monohalogenated silane. The membrane is useful in separating gases such as to produce oxygen-rich air.
Inventors
- 👤 Akitoshi Sugio
- 👤 Masamichi Mizukami
- 👤 Masao Okabe
- 👤 Yoshihiko Sekine
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-05 13:49
CPC Classifications
B; B01; B01D; B01D71/00; B01D71/06; B01D71/52; B01D71/522; B01D71/5223; C; C01; C01B; C01B13/00; C01B13/02; C01B13/0229; C01B13/0248; C01B13/0251; C01B13/0255; C01B2210/00; C01B2210/0043; C01B2210/0046; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24479; Y10T428/24496; Y10T428/24504; Y10T428/31504; Y10T428/31652; Y10T428/31663
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
130 words
A polyphenylene ether . membrane for gas separation characterized in that it is made of a silylated polyphenylene ether wherein at least a part of the repeating unit has a constituting unit containing an organosilane group represented by the formula (I): wherein R 1 , R 2 , R 3 and R 4 each represents a hydrogen atom or a group of the formula -Si(R 5 )(R 6 )(R 7 ), wherein R 5 , R 6 and R 7 each represents an alkyl group; A and n each represents 0 or an integer of from 1 to 3; and m represents an integer of from 1 to 3; with the proviso that R 1 , R 2 , R 3 and R 4 do not simultaneously represent hydrogen atoms.
Claim 2
Dependent Claim
130 words
A polyphenylene ether . membrane for gas separation characterized in that it is made of a silylated polyphenylene ether wherein at least a part of the repeating unit has a constituting unit containing an organosilane group represented by the formula (I): wherein R 1 , R 2 , R 3 and R 4 each represents a hydrogen atom or a group of the formula -Si(R 5 )(R 6 )(R 7 ), wherein R 5 , R 6 and R 7 each represents an alkyl group; A and n each represents 0 or an integer of from 1 to 3; and m represents an integer of from 1 to 3; with the proviso that R 1 , R 2 , R 3 and R 4 do not simultaneously represent hydrogen atoms.
Claim 3
Dependent Claim
28 words
A membrane as claimed in Claim 1, wherein R 5 , R 6 and R 7 each represents an alkyl group having from 1 to 5 carbon atoms.
Claim 4
Dependent Claim
42 words
A membrane as claimed in Claim 1 or 2, wherein the silylated polyphenylene ether was prepared by reacting a polyphenylene ether with an alkali metal-adding agent to form an alkali metal-added polyphenylene ether and reacting the resulting product with a monohalogenated silane.
Claim 5
Dependent Claim
18 words
A membrane as claimed in Claim 3, wherein the polyphenylene ether is poly(2,6-dimethyl-1,4-phenylene) ether or a 2,6-dimethylphenol/2,3,6-trimethylphenol copolymer.
Claim 6
Dependent Claim
22 words
A membrane as claimed in Claim 3 or 4, wherein the alkali metal-adding agent is an alkyl lithium or an aryl lithium.
Claim 7
Dependent Claim
34 words
A membrane as claimed in Claim 3, 4 or 5, wherein the alkali metal-adding agent is used in an amount of from 0.3 to 3.0 molar equivalents per repeating unit of the polyphenylene ether.
Claim 8
Dependent Claim
35 words
A membrane as claimed in Claim 3, 4, 5 or 6, wherein the alkali metal-adding agent is used in an amount of from 0.5 to 2.0 molar equivalents per repeating unit of the polyphenylene ether.
Claim 9
Dependent Claim
44 words
A membrane as claimed in any of Claims 3 to 7, wherein the reaction between the polyphenylene ether and the alkali metal-adding agent and the reaction between the product and the monohalogenated silane are carried out at a temperature of from -80°C to 80°C.
Claim 10
Dependent Claim
16 words
A membrane as claimed in Claim 8, wherein said reaction temperature is from -50°C to 30°C.
Claim 11
Dependent Claim
18 words
A membrane as claimed in any of Claims 3 to 9, wherein the monohalogenated silane is a chlorosilane.
Claim 12
Dependent Claim
17 words
A membrane as claimed in any of Claims 3 to 10, wherein the monohalogenated silane is trimethylchlorosilane.
Claim 13
Dependent Claim
22 words
A membrane as claimed in any preceding claim, wherein said membrane comprises a silylated polyphenylene ether supported by a thin porous support.
Claim 14
Independent Claim
38 words
A method of separating components of a gaseous mixture, wherein the mixture is passed over a membrane made of a polyphenylene ether, characterized in that the ether is a silylated polyphenylene ether as claimed in any preceding claim.
References Cited (Backward Citations)
No citation records indexed.
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