Ion exchange membrane, method for manufacturing same, module, and device

Patent metadata

Field	Value
Publication number	US-9873116-B2
Application number	US-201715413432-A
Country	US
Kind code	B2
Filing date	Jan 24, 2017
Priority date	Aug 14, 2014
Publication date	Jan 23, 2018
Grant date	Jan 23, 2018

Abstract

An ion exchange membrane of the present invention contains a resin having an amino group and a constitutional unit represented by Formula 1, in which the number of amino groups per dry mass is 0.15 to 2.4 mmol/g. In Formula 1, L 1 represents an alkylene group or an alkenylene group, R a , R b , R c , and R d each independently represent an alkyl group or an aryl group, R a and R b and/or R c and R d may form a ring by being bonded to each other, n1 and n2 each independently represent an integer of 1 to 10, and X 1 − and X 2 − each independently represent an organic or inorganic anion.

First claim

What is claimed is:

1. An ion exchange membrane comprising:
a resin having an amino group and a constitutional unit represented by Formula 1,
wherein the number of amino groups per dry mass is 0.15 to 2.4 mmol/g,

in Formula 1, L 1 represents an alkylene group or an alkenylene group, R a , R b , R c , and R d each independently represent an alkyl group or an aryl group, R a and R b and/or R c and R d may form a ring by being bonded to each other, n1 and n2 each independently represent an integer of 1 to 10, and X 1 − and X 2 − each independently represent an organic or inorganic anion.

2. The ion exchange membrane according to claim 1 ,
wherein the resin has, as a structure having the amino group, a constitutional unit represented by the following Formula 2 in at least a portion of the resin,

in Formula 2, L 2 represents an alkylene group or an alkenylene group, R e , R f , R g , and R h each independently represent an alkyl group or an aryl group, R e and R f and/or R g and R h may form a ring by being bonded to each other, n3 represents an integer of 1 to 10, and X 3 − represents an organic or inorganic anion.

3. The ion exchange membrane according to claim 1 ,
wherein R a and R b and/or R c and R d form a ring by being bonded to each other.

4. The ion exchange membrane according to claim 2 ,
wherein R e and R f and/or R g and R h form a ring by being bonded to each other.

5. The ion exchange membrane according to claim 1 ,
wherein X 1 − and X 2 − each independently are a halide ion.

6. The ion exchange membrane according to claim 1 ,
wherein the resin further has a cross-linked structure in addition to the constitutional unit represented by Formula 1.

7. The ion exchange membrane according to claim 6 ,
wherein a content of the cross-linked structure other than the constitutional unit represented by Formula 1 is 0.05 to 0.5 mmol/g with respect to a total mass of the resin.

8. A method for manufacturing the ion exchange membrane according to claim 1 , comprising:
a membrane preparation step of preparing a membrane containing a resin having a constitutional unit represented by Formula 3; and
a reaction step of reacting the membrane with an amine compound represented by Formula 4,

in Formulae 3 and 4, n4 represents an integer of 1 to 10, X represents a leaving group, L 3 represents an alkylene group or an alkenylene group, R i , R j , R k , and R m each independently represent an alkyl group or an aryl group, and R i and R j and/or R k and R m may form a ring by being bonded to each other.

9. The method for manufacturing the ion exchange membrane according to claim 8 ,
wherein in the membrane preparation step, the resin having a constitutional unit represented by Formula 3 is formed by polymerizing a composition containing a compound represented by Formula 5 and a polymerization initiator,

in Formula 5, n4 represents an integer of 1 to 10, and X represents a leaving group.

10. The method for manufacturing the ion exchange membrane according to claim 9 ,
wherein the compound represented by Formula 5 is a liquid at 25° C.

11. The method for manufacturing the ion exchange membrane according to claim 9 ,
wherein a content of the compound represented by Formula 5 in the composition is equal to or greater than 50% by weight.

12. The method for manufacturing the ion exchange membrane according to claim 9 ,
wherein the composition does not contain an organic solvent, or a content of an organic solvent in the composition is greater than 0% by mass and equal to or less than 1% by mass.

13. The method for manufacturing the ion exchange membrane according to claim 8 ,
wherein X is a halogen atom.

14. The method for manufacturing the ion exchange membrane according to claim 8 ,
wherein in the reaction step, both of the constitutional unit represented by Formula 1 and the constitutional unit represented by Formula 2 are formed in the resin.

15. A module comprising:
the ion exchange membrane according to claim 1 .

16. A device comprising:
the ion exchange membrane according to claim 1 .

Assignees

• Fujifilm Corp

Inventors

• Kaminaga Kuniyuki
• Inoue Kazuomi

Classifications

• C08F12/18

  Chlorine · CPC title

• B01J41/14 Primary

  obtained by reactions only involving unsaturated carbon-to-carbon bonds · CPC title

• C08F212/18

  Chlorine · CPC title

• C08J5/22

  Films, membranes or diaphragms · CPC title

• B01J47/12

  characterised by the use of ion-exchange material in the form of ribbons, filaments, fibres or sheets, e.g. membranes (electrodialysis or electro-osmosis B01D61/42) · CPC title