Spiral wound gas filtration modules and components thereof

Patent metadata

Field	Value
Publication number	US-9968889-B2
Application number	US-201415026974-A
Country	US
Kind code	B2
Filing date	Sep 30, 2014
Priority date	Oct 3, 2013
Publication date	May 15, 2018
Grant date	May 15, 2018

Abstract

A membrane envelope stack for gas separation comprising membrane envelopes bonded together by means of an adhesive having a tensile E-modulus of at least 1600 N/mm 2 and/or an elongation at break of 20% or less and/or a Tg of at least 50° C.

First claim

The invention claimed is:

1. A membrane envelope stack for gas separation comprising membrane envelopes bonded together by means of an adhesive having a tensile E-modulus of at least 1600 N/mm 2 and an elongation at break of 20% or less and/or a Tg of at least 50° C., wherein:
(i) the membrane envelopes comprise one or more membrane sheets and optionally a feed spacer sandwiched between the membrane sheet(s);
(ii) the membrane sheet(s) are composite membranes comprising a discriminating layer and a porous support; and
(iii) the tensile E-Modulus, tensile strength at break and elongation at break measurements are as measured on samples of cured adhesive using a Zwick Z010 4millimeter type V test strips as per ASTM method D638 at 22° C., relative humidity of 50% and using a crosshead speed of 30 millimeters/minute.

2. The membrane envelope stack according to claim 1 wherein the adhesive has an elongation at break of 20% or less.

3. The membrane envelope stack according to claim 1 wherein the adhesive has a Tg of at least 50° C.

4. The membrane envelope stack according to claim 1 wherein the adhesive has a tensile E-modulus of at least 1600 N/mm 2 , an elongation at break of 20% or less and a Tg of at least 50° C.

5. The membrane envelope stack according to claim 1 wherein the discriminating layer(s) comprise a polyimide having —CF 3 groups.

6. The membrane envelope stack according to claim 1 wherein the discriminating layer(s) comprise groups of the Formula (1) wherein Ar is an aromatic group and R is a carboxylic acid group, a sulphonic acid group, a hydroxyl group, a thiol group, an epoxy group or an oxetane group:

7. The membrane envelope stack according to claim 1 wherein the adhesive is a multi-part adhesive comprising a polymerisable substance and a hardening agent.

8. A spiral wound gas filtration module comprising a membrane envelope stack according to claim 1 .

9. A method for preparing a membrane envelope stack according to claim 1 comprising:
(a) providing a plurality of membrane envelopes;
(b) stacking the plurality of membrane envelopes and bonding the membrane envelopes together by means of a partially cured adhesive, optionally also providing a permeate spacer between each membrane envelope; and
(c) curing the partially cured adhesive to give a cured adhesive;

wherein the cured adhesive has a tensile E-modulus of at least 1600 N/mm 2 and an elongation at break of 20% or less and/or a Tg of at least 50° C.

10. The method for preparing a spiral wound gas filtration module according to claim 8 comprising the steps:
(i) providing a permeate collection tube having perforations;
(ii) providing a membrane envelope stack comprising membrane envelopes bonded together by means of a partially cured adhesive;
(iii) winding the membrane envelope stack comprising the partially cured adhesive about the permeate collection tube; and
(iv) curing the partially cured adhesive to give a cured adhesive;

wherein the cured adhesive has a tensile E-modulus of at least 1600 N/mm 2 and an elongation at break of 20% or less and/or a Tg of at least 50° C.

11. A process for separation of 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 comprising passing the feed gas through a module according to claim 8 .

12. The membrane envelope stack according to claim 1 wherein the adhesive is a multi-part adhesive comprising a polymerisable substance and a hardening agent and the discriminating layer(s) comprise a polyimide having —CF 3 groups.

13. The membrane envelope stack according to claim 1 wherein the adhesive is a multi-part adhesive comprising a polymerisable substance and a hardening agent and the discriminating layer(s) comprise groups of the Formula (1) wherein Ar is an aromatic group and R is a carboxylic acid group, a sulphonic acid group, a hydroxyl group, a thiol group, an epoxy group or an oxetane group:

14. A spiral wound gas filtration module comprising a membrane envelope stack according to claim 1 .

15. A spiral wound gas filtration module comprising a membrane envelope stack according to claim 1 wherein the adhesive is a multi-part adhesive comprising a polymerisable substance and a hardening agent and the discriminating layer(s) comprise a polyimide having —CF 3 groups.

16. The method according to claim 9 wherein the cured adhesive has a tensile E-modulus of at least 1600 N/mm 2 , an elongation at break of 20% or less and a Tg of at least 50° C.

17. The method according to claim 9 wherein the adhesive is a multi-part adhesive comprising a polymerisable substance and a hardening agent and the discriminating layer(s) comprise a polyimide having —CF 3 groups.

18. The method according to claim 10 wherein the cured adhesive has a tensile E-modulus of at least 1600 N/mm 2 , an elongation at break of 20% or less and a Tg of at least 50° C.

Assignees

• Fujifilm Mfg Europe Bv
• Fujifilm Corp

Inventors

• Jessen Peter
• Itami Yujiro

Classifications

• B01D71/64

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

• B01D63/103 Primary

  Details relating to membrane envelopes · CPC title

• B01D65/003

  Membrane bonding or sealing · CPC title

• B01D53/228

  characterised by specific membranes · CPC title

• B01D2313/143

  on the feed side · CPC title