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Supported zeolite membranes

一种沸石分子筛、阳离子的技术，应用在制作非对称膜,制备地质聚合物组合物,非对称膜的制作,膜分离领域，能够解决存在需求等问题

Active Publication Date: 2020-03-24
NOVO RUICHI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Despite advances in the prior art, there remains a need for lower cost supported zeolite molecular sieve membranes and improved lower cost methods for making supported zeolite molecular sieve membranes

Method used

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  • Supported zeolite membranes
  • Supported zeolite membranes

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Geopolymer composition: same as Comparative Example A; geopolymer curing: 24 hours at ambient temperature, then 1 hour at 60°C; geopolymer hydrothermal treatment: 24 hours in 90°C water; zeolite molecular sieve seed crystal: geopolymer water Seed crystal after heat treatment (one time); carrier masking before hydrothermal synthesis of zeolite molecular sieve: yes; composition of zeolite molecular sieve synthesis precursor solution: 2SiO 2 :Al 2 o 3 :2.1Na 2 O:140H 2 O; Zeolite molecular sieve membrane hydrothermal synthesis: 8 hours in zeolite molecular sieve synthesis solution at 90°C.

[0049] In this example, the geopolymer composition was prepared in the same manner as Comparative Example A. After mixing, the geopolymer mixture was cast into disc-shaped molds with a diameter of 25 mm and a thickness of 3 mm. The disc molds were sealed and cured at room temperature for 24 hours, then at 60°C for 1 hour before demoulding. XRD analysis shows that the carrier is a...

Embodiment 2

[0054] Membrane production is the same as in Example 1, except for the following: geopolymer solidification: 60°C for 24 hours; zeolite molecular sieve membrane hydrothermal synthesis: zeolite molecular sieve synthesis solution at 90°C for 6 hours.

[0055] In this example, a geopolymer carrier was fabricated in the same manner as in Example 1, except that geopolymer curing was performed at 60° C. for 24 hours. XRD analysis showed that the support was an amorphous geopolymer after solidification with some quartz impurity peaks, and faujasite molecular sieves appeared after hydrothermal treatment of the geopolymer in water at 90 °C for 24 hours. In this example, the production of the zeolite molecular sieve membrane on the geopolymer carrier is the same as in Example 1, except that the zeolite hydrothermal synthesis is carried out at 90° C. for 6 hours. The XRD analysis of the zeolite molecular sieve membrane supported on the geopolymer carrier showed that after the zeolite mol...

Embodiment 3

[0058] Membrane production is the same as in Example 2, except for the following: carrier masking before zeolite molecular sieve hydrothermal synthesis: none; zeolite molecular sieve membrane hydrothermal synthesis: 8 hours in zeolite molecular sieve synthesis solution at 90°C.

[0059]In this example, a geopolymer carrier was fabricated in the same manner as in Example 2. In this example, the manufacture of the zeolite molecular sieve membrane on the geopolymer carrier is the same as in Example 2, except that the geopolymer carrier is used directly without any surface masking and the hydrothermal synthesis of the zeolite molecular sieve is carried out at 90°C for 8 Hour.

[0060] Membrane dehydration performance evaluation was carried out in the same manner as in Example 1. The separation factor of the zeolite molecular sieve membrane manufactured in this example is greater than 10000 at 50°C in terms of separating 90% ethanol and 10% water, and the permeation flux is 2.2kg / ...

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Abstract

An asymmetric membrane having a layer containing a zeolite supported on a geopolymer substrate and methods for making an asymmetric membrane having a layer containing a zeolite supported on a geopolymer substrate. A cross-flow membrane separation method for increasing the concentration of ethanol from a feed mixture comprising water and ethanol, comprising: cross-flowing a feed mixture comprisingwater and ethanol across the layer comprising a zeolite of the asymmetric membrane of the instant invention to produce a permeate having an ethanol concentration less than the ethanol concentration ofthe feed mixture and a retentate having an ethanol concentration greater than the ethanol concentration of the feed mixture, the pressure of the feed mixture being greater than the pressure of the permeate.

Description

Background technique [0001] The present invention relates to separation-based technologies, and more particularly to membrane separation technologies. Membrane separation can be an energy and money saving process, offering low operating costs compared to other separation processes such as distillation. High-molecular polymer membranes have been widely used, but due to the limitations of their high-molecular polymer material properties, high-molecular polymer membranes cannot meet the performance requirements in some separation applications. For example, high molecular polymer membranes typically operate at relatively low temperatures and degrade in performance when encountering organic compounds present in many industrial processes. Furthermore, the separation selectivity and permeate flux of polymeric membranes are relatively low for many separation applications. Inorganic membranes, including zeolite molecular sieve membranes, have unique advantages over polymeric membrane...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/02B01D69/12B01D69/10B01D67/00B01D61/36
CPCB01D61/36B01D67/0051B01D69/10B01D69/12B01D71/028B01D71/0281B01D69/02B01D2315/10C07C29/76B01D2325/0233B01D69/1216B01D69/108
Inventor J·J·蔡J·J·刘
Owner NOVO RUICHI TECH CO LTD
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