Thermal cracking resistant zeolite membrane and method of fabricating the same

A production method and separation membrane technology, applied in semipermeable membrane separation, chemical instruments and methods, membranes, etc., can solve problems such as no research and development solutions, and achieve the effects of reducing production costs, reducing thermal cracking, and shortening production time
CN102309928AActive Publication Date: 2012-01-11KOREA INST OF ENERGY RES
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
KOREA INST OF ENERGY RES
Publication Date
2012-01-11

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Abstract

The present disclosure relates to a thermal cracking resistant zeolite membrane and a method of fabricating the same. The method includes dissolving an alumina-based material, a silica-based material and sodium hydroxide in water to prepare an aqueous solution, stirring the aqueous solution to form a hydrothermal solution, preparing a slurry of zeolite seeds through wet-type vibration pulverization and centrifugal separation of zeolite powder, passing the zeolite seeds through a support by vacuum filtration such that the zeolite seeds can be infiltrated into an inner region of the support ranging from a depth of 3 [mu]m to a depth corresponding to 50% of a total thickness of the support, and immersing the support into the hydrothermal solution for hydrothermal treatment to grow a dense zeolite separation layer not only on the surface of the support but also on the inner region thereof. The zeolite membrane prevents the occurrence of thermal cracking on the zeolite separation layer, thereby providing good thermal stability and separation performance during heating and at a target processing temperature.
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Description

technical field

[0001] The invention relates to a zeolite separation membrane preventing thermal cracking and a manufacturing method thereof, in particular to a technique for preventing thermal cracking of the zeolite separation membrane so that the zeolite separation membrane has stability and excellent separation performance. Background technique

[0002] Zeolite is regularly arranged in the crystal structure with a diameter of ten to tens of Uniform micro-sized (micro) or medium-sized (meso) pores, representative zeolite substances include aluminosilicate (Aluminosilicate).

[0003] Aluminosilicate zeolites are partially SiO 2 Replaced by Al 2 o 3 Substances that also contain substituted Al in order to maintain electrical neutrality 2 o 3 A substance that has twice the number of moles of Na ions.

[0004] For example, NaA zeolite is regularly arranged in a three-dimensional form within a crystal structure with a diameter of 4 Aluminosilicate (Aluminosilicate) min...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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