US 11,141,703 B2 · Porous support-zeolite membrane composite, and method for producing porous support-zeolite membrane composite

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.

Claims12

Dependent claims

A production method of a porous support-zeolite membrane composite, comprising:

attaching inorganic particles other than zeolite to a porous support;
and
forming a zeolite membrane on the porous support, wherein:
a zeolite constituting the zeolite membrane comprises Si and Al, and has a SiO2/Al2O3 molar ratio of 20 or more;
the zeolite has a pore structure of not more than oxygen 8 members ring;
and
the inorganic particle is at least one inorganic particle selected from the group consisting of fumed silica, colloidal silica, alumina sol, sodium aluminate, aluminum hydroxide, pseudo boehmite, aluminum sulfate, aluminum nitrate, aluminum oxide, and amorphous aluminosilicate gel.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application

16/445,450Filed 19 Jun 2019 · continuation

Priority

JP 2014-23784125 Nov 2014

Published

US 2019/0299167 A13 Oct 2019

Granted

12 Oct 2021

Term ends

Not estimatedThe source records don’t support an estimate.

Classification15 codes

B01D 69/12
Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes…:…
B01D 53/228
By diffusion: characterised by specific membranes
B01D 67/0051
Inorganic membrane manufacture: by controlled crystallisation, e,.g. hydrothermal growth
B01D 69/106
Supported membranes; Membrane supports: membranes in the pores of a support, e.g. polymerized in the pores or voids

Family

PCT/JP2015/083069Parent of this continuation · filed 25 Nov 2015

Application15/602,453Parent of this continuation · filed 23 May 2017

US 2019/0299167 A1Pre-grant publication · published 3 Oct 2019

US 10,369,528 B2Parent of this continuation

US 2017/0259214 A1Published application

US 11,141,703 B2This patent

From the US filing history. Foreign family members aren’t listed.

Porous support-zeolite membrane composite, and method for producing porous support-zeolite membrane composite

Life of this patent

Porous support-zeolite membrane composite, and method for producing porous support-zeolite membrane composite

Life of this patent

Abstract

Claims12