# US 10,369,528 B2 · Porous support-zeolite membrane composite, and method for producing porous support-zeolite membrane composite

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- Number: US 10,369,528 B2
- Document ID: US10369528B2
- Status: Granted
- Kind: B2
- Application number: 15/602,453
- Filed: 2017-05-23
- Published: 2017-09-14
- Granted: 2019-08-06
- Earliest claimed: 2014-11-25
- Assignees: Mitsubishi Chemical Corporation
- Applicants: Mitsubishi Chemical Corporation
- Inventors: Ayuko Onozuka; Miki Yamada; Mikio Hayashi; Takahiko Takewaki
- Web page: https://patentgrep.com/patent/US10369528B2

## CPC

- B01D 69/12: Composite membranes; Ultra-thin membranes
- B01D 53/228: {characterised by specific membranes}
- B01D 67/0051: {by controlled crystallisation, e,.g. hydrothermal growth}
- B01D 69/106: {Membranes in the pores of a support, e.g. polymerized in the pores or voids}
- B01D 69/108: {Inorganic support material}
- B01D 71/0281: {Zeolites}
- C01B 39/02: Crystalline aluminosilicate zeolites; Isomorphous compounds thereof; Direct preparation thereof; Preparation thereof starting from a reaction mixture containing a crystalline zeolite of another type, or from preformed reactants; After-treatment thereof
- C01B 39/38: Type ZSM-5
- C01B 39/46: Other types characterised by their X-ray diffraction pattern and their defined composition {(C01B39/023, C01B39/026, C01B39/06 take precedence)}
- C01B 39/48: using at least one organic template directing agent
- B01D 2325/02834: more than 0.1 and up to 1 µm
- C01P 2004/03: obtained by SEM
- B01D: SEPARATION (separating solids from solids by wet methods B03B, B03D; by pneumatic jigs or tables B03B; by other dry methods B07; magnetic or electrostatic separation of solid materials from solid materials or fluids, separation by high-voltage electric fields B03C; centrifuges, vortex apparatus B04; presses per se for squeezing-out liquid from liquid-containing material B30B9/02; treatment of water C02F, e.g. softening by ion-exchange C02F1/42; {arrangements of air intake cleaners in gas turbine plants F02C7/05} ; arrangements or mounting of filters in air-conditioning, air-humidification or ventilation F24F13/28)
- C01B: NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; {METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C}
- C01P: INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS

## Abstract

An object of the present invention is to provide a porous support-zeolite membrane composite ensuring that at the time of separation or concentration with a zeolite membrane, both sufficient throughput and high separation performance are achieved in practice and the present invention relates to a porous support-zeolite membrane composite having a porous support and a zeolite membrane formed on the porous support, wherein part of the zeolite membrane penetrates into the inside of the porous support and the distance from the surface of the porous support to the inside into which the zeolite film penetrates is 5.0 μm or less on average.

## Claims

### Claim 1

A separation or concentration method of a gas mixture, comprising:
bringing a gas mixture into contact with a porous support-zeolite membrane composite, the gas mixture comprising a high-permeability component and a low-permeability component which is less permeable to the porous support-zeolite membrane composite than the high-permeability component; and
separating by permeation the high-permeability component from the gas mixture, or concentrating the low-permeability component by permeation and separation of the high-permeability component,
wherein the porous support-zeolite membrane composite comprises:
a porous support; and
a zeolite membrane formed on the porous support,
wherein:
part of the zeolite membrane penetrates into the inside of the porous support;
the distance from the surface of the porous support to the inside into which the zeolite membrane penetrates is 5.0 μm or less on average;
a zeolite constituting the zeolite membrane comprises Si and Al, and has the SiO2/Al2O3 molar ratio of 20 or more; and
the zeolite has a pore structure of not more than oxygen 8 members ring.

### Claim 2 (depends on 1)

The separation or concentration method according to claim 1, wherein the SiO2/Al2O3 molar ratio of the zeolite membrane is 2,000 or less.

### Claim 3 (depends on 1)

The separation or concentration method according to claim 1, wherein the average pore size of the porous support is 0.3 μm or more.

### Claim 4 (depends on 1)

The separation or concentration method according to claim 1, wherein the pore structure of zeolite constituting the zeolite membrane is CHA.

### Claim 5 (depends on 1)

The separation or concentration method according to claim 1, wherein the distance from the surface of the porous support to the inside into which the zeolite membrane penetrates is from 0.03 to 1.7 μm on average.

### Claim 6 (depends on 1)

The separation or concentration method according to claim 1, wherein the porous support-zeolite membrane composite further comprises inorganic particles other than zeolite attached to the porous support.

### Claim 7 (depends on 6)

The separation or concentration method according to claim 6, wherein the inorganic particles are silica particles.