Spiral wound gas filtration module with specific adhesive

Patent metadata

Field	Value
Publication number	US-9931597-B2
Application number	US-201415026980-A
Country	US
Kind code	B2
Filing date	Sep 30, 2014
Priority date	Oct 3, 2013
Publication date	Apr 3, 2018
Grant date	Apr 3, 2018

Abstract

A membrane envelope comprising a feed spacer, one or more membrane sheets and an adhesive, to give a glue line laminate having a tensile E-modulus of at least 1600 N/mm 2 and/or an elongation at break of 13% or less.

First claim

The invention claimed is:

1. A membrane envelope stack for separating gases comprising membrane envelopes bonded together by means of a cured adhesive to give a glue line laminate having a tensile E-modulus of at least 1600 N/mm 2 and an elongation at break of 13% or less; and
wherein the tensile E-modulus and elongation at break are as measured on test strips cut from the glue line laminate, the measurements being performed using a Zwick Z010 4 millimeter as per the method of ISO 527-3:1995 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 a Tg of at least 50° C. when cured.

3. The membrane envelope stack according to claim 1 wherein the membrane envelopes comprise a feed spacer sandwiched between two membrane sheets, or one membrane sheet is folded around the feed spacer.

4. The membrane envelope stack according to claim 3 wherein the membrane sheet(s) are composite membranes comprising a discriminating layer and a porous support.

5. The membrane envelope stack according to claim 4 wherein the discriminating layers comprise a polyimide having —CF 3 groups.

6. The membrane envelope stack according to claim 4 wherein the discriminating layer comprises 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. The membrane envelope stack according to claim 1 wherein the glue line laminate comprises of two membranes and an adhesive.

9. The membrane envelope stack according claim 8 wherein the glue line laminate further comprises a permeate carrier.

10. The membrane envelope stack according claim 9 wherein the permeate carrier comprises one or two permeate spacer layers and optionally a gas impermeable sheet located between the two permeate spacer layers.

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

12. 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 carrier between each membrane envelope; and
(c) curing the partially cured adhesive to give a cured adhesive;

wherein the cured adhesive adheres the membrane envelopes together to give a glue line laminate having a tensile E-modulus of at least 1600 N/mm 2 and an elongation at break of 13% or less; and
wherein the tensile E-modulus and elongation at break are as measured on test strips cut from the glue line laminate, the measurements being performed using a Zwick Z010 4 millimeter as per the method of ISO 527-3:1995 at 22° C., relative humidity of 50% and using a crosshead speed of 30 millimeters/minute.

13. 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 11 .

14. The membrane envelope stack according to claim 3 wherein the membrane envelopes have a CO 2 /CH 4 selectivity >10.

15. The membrane envelope stack according to claim 14 wherein the adhesive is a cured adhesive and the glue line laminate has a tensile E-modulus of at least 1600 N/mm 2 and an elongation at break of 13% or less and the adhesive has a Tg of at least 50° C. when cured; and
wherein the tensile E-modulus and elongation at break are as measured on test strips cut from the glue line laminate, the measurements being performed using a Zwick Z010 4 millimeter as per the method of ISO 527-3:1995 at 22° C., relative humidity of 50% and using a crosshead speed of 30 millimeters/minute.

Assignees

• Fujifilm Mfg Europe Bv
• Fujifilm Corp

Inventors

• Jessen Peter
• Itami Yujiro

Classifications

• B01D53/228

  characterised by specific membranes · CPC title

• B01D65/003

  Membrane bonding or sealing · CPC title

• B01D63/103 Primary

  Details relating to membrane envelopes · CPC title

• B01D71/64

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