Membranes

Patent metadata

Field	Value
Publication number	US-2016256833-A1
Application number	US-201415026977-A
Country	US
Kind code	A1
Filing date	Sep 30, 2014
Priority date	Oct 3, 2013
Publication date	Sep 8, 2016
Grant date	—

Abstract

A composite gas membrane comprising: a) a porous support; b) an activated gutter layer; c) a discriminating layer located on the gutter layer; and d) optionally a protective layer on the discriminating layer; wherein the said layers remain in place when a peeling force of 2.5 N/1.5 cm is applied to the outermost of said layers.

First claim

1 . A composite gas membrane comprising:
a) a porous support; b) an activated gutter layer; c) a discriminating layer; and d) optionally a protective layer;
wherein the said layers remain in place when a peeling force of 2.5 N/1.5 cm is applied to the outermost of said layers.

2 . The composite membrane according claim 1 wherein the gutter layer has been activated by a process comprising a corona treatment, plasma treatment, flame treatment and/or ozone treatment.

3 . The composite membrane according claim 1 wherein the discriminating layer contains amine groups.

4 . The composite membrane according to claim 1 wherein the discriminating layer further comprises silicon atoms.

5 . The composite membrane according to claim 1 wherein gutter layer comprises a polymer and/or dialkylsiloxane groups.

6 . The composite membrane according to claim 1 wherein the discriminating layer comprises a group comprising an amine group, a silicon atom and an alkylene group wherein the silicon atom and the amine group are linked together by the alkylene group.

7 . The composite membrane according to claim 1 wherein the ingredients used to form the discriminating layer comprise an alkoxy silane compound comprising an amine group.

8 . The composite membrane according to claim 1 wherein the discriminating layer further comprises a —CF 3 group.

9 . The composite membrane according to claim 1 wherein the discriminating layer has been obtained from a composition which is free from silane compounds comprising acetoxy-groups.

10 . The composite membrane according to claim 3 which comprises protective layer d) comprising carboxylic acid groups.

11 . A gas separation cartridge comprising a composite membrane according to claim 18 .

12 . A gas separation module for separating a feed gas containing a target gas into a gas stream rich in the target gas and a gas stream depleted in the target gas, the module comprises a housing and one or more cartridges according to claim 11 .

13 . A method for separating a feed gas containing a target gas into a gas stream rich in the target gas and a gas stream depleted in the target gas, which method comprises contacting the feed gas with a membrane according to claim 1 and collecting the gas which passes through the membrane and/or the gas which does not pass through the membrane.

14 . The composite membrane according claim 1 wherein (i) the gutter layer has been activated by a process comprising a corona treatment, plasma treatment, flame treatment and/or ozone treatment; (ii) the discriminating layer contains amine groups and silicon atoms; and (iii) the gutter layer comprises dialkylsiloxane groups.

15 . The composite membrane according to claim 14 wherein the discriminating layer comprises a —CF 3 group and the ingredients used to form the discriminating layer comprise an alkoxy silane compound comprising an amine group.

16 . The composite membrane according to claim 14 wherein the discriminating layer has been obtained from a composition which is free from silane compounds comprising acetoxy-groups.

17 . The composite membrane according to claim 14 which further comprises the protective layer d) and said protective layer comprises carboxylic acid groups.

18 . The composite membrane according to claim 14 which further comprises the protective layer d) and said protective layer comprises carboxylic acid groups, wherein (iv) the discriminating layer comprises a —CF 3 group; (v) the composition used to form the discriminating layer comprises an alkoxy silane compound comprising an amine group; (vi) the composition used to form the discriminating layer is free from silane compounds comprising acetoxy-groups.

Assignees

• Fujifilm Mfg Europe Bv
• Fujifilm Corp

Inventors

• Itoh Shigehide
• Van Kessel Petrus
• Itami Yujiro

Classifications

• B01D71/64

  Polyimides; Polyamide-imides; Polyester-imides; Polyamide acids or similar polyimide precursors · CPC title

• B01D69/12 Primary

  Composite membranes; Ultra-thin membranes · CPC title

• B01D67/009

  with wave-energy, particle-radiation or plasma · CPC title

• B01D71/70

  Polymers having silicon in the main chain, with or without sulfur, nitrogen, oxygen or carbon only · CPC title

• B01D2313/44

  Cartridge types · CPC title