Monolithic separation membrane structure, method for producing monolithic separation membrane structure, and method for dehydrating

Patent metadata

Field	Value
Publication number	US-11020707-B2
Application number	US-201615263664-A
Country	US
Kind code	B2
Filing date	Sep 13, 2016
Priority date	Mar 28, 2014
Publication date	Jun 1, 2021
Grant date	Jun 1, 2021

Abstract

A monolithic separation membrane structure comprises a support body and a separation membrane. The support body is composed of a porous material and includes a plurality of through holes. The separation membrane is formed in a tubular shape on an inner side of the plurality of through holes, and is used in a penetrative vaporization method or a vapor infiltration method. The helium gas permeation resistance in the support body is less than 8.3×107 Pa·sec/m2.

First claim

The invention claimed is:

1. A method of producing a monolithic separation membrane structure comprising:
preparing a material including an aggregate material selected from the group consisting of alumina, titania, mullite, potsherd and cordierite;
forming a porous support body including a plurality of first through holes and a plurality of second through holes from the material;
closing both end openings of the respective plurality of second through holes; and
forming a separation membrane selected from the group consisting of penetrative vaporization membranes and vapor infiltration membranes in a tubular shape on an inner side of the plurality of first through holes, wherein
the helium gas permeation resistance in the support body is adjusted to 5.6×10 7 Pa·sec/m 2 or less by adding at least one of a coarse-grained aggregate material and a pore forming agent in the step for preparing the material, and
wherein the amount of coarse-grained aggregate material added is 5 to 40 wt % and the amount of pore forming agent added is 0.1 to 20 wt %, based on the amount of aggregate material included in the step of preparing the material.

Assignees

• Ngk Insulators Ltd

Inventors

• Teranishi Makoto
• Ichikawa Akimasa
• Suzuki Hideyuki

Classifications

• B01D71/021

  Carbon · CPC title

• B01D69/12

  Composite membranes; Ultra-thin membranes · CPC title

• B01D2325/20

  Specific permeability or cut-off range · CPC title

• B01D63/061

  Manufacturing thereof · CPC title

• B01D63/066 Primary

  with a porous block having membrane coated passages · CPC title