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A kind of preparation method of silicalite-1 zeolite membrane for dealcoholization

A zeolite membrane and zeolite technology, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve problems such as poor binding force of zeolite layers

Active Publication Date: 2021-12-17
林贤贵
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to improve the existing synthesis method for the problems such as the poor bonding force between the alumina carrier and the silicalite-1 zeolite layer

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) The alumina tubular carrier is polished, rinsed, soaked and dried;

[0029] (2) Mix ZSM-5 zeolite particles with an average particle size of 1.2 μm and ethanol to prepare a 0.5% ZSM-5 zeolite suspension; the silicalite-1 zeolite particles with a particle size of 1.5 μm are beaded with stainless steel beads Grinding to reduce the particle size to 300nm, and mixing with ethanol to prepare a 1.5% silicalite-1 zeolite suspension;

[0030] (3) Apply a layer of ZSM-5 zeolite particles on the alumina carrier by vacuum suction method, set the vacuum degree to 10kPa, and the suction time to 10s, dry at 60°C for 2h, and then send it into the muffle furnace Roast at 450°C for 1h, and the heating and cooling frequency is 1°C / min;

[0031] (4) Immerse the roasted carrier into the silicalite-1 zeolite suspension to coat the surface of the carrier with a layer of silicalite-1 zeolite particles. The immersion time is 10s, and the coating is done twice. Continue to dry for 2h;

...

Embodiment 2

[0035] (1) The alumina tubular carrier is polished, rinsed, soaked and dried;

[0036] (2) Mix ZSM-5 zeolite particles with an average particle size of 1.2 μm and ethanol to prepare a 0.5% ZSM-5 zeolite suspension; the silicalite-1 zeolite particles with a particle size of 1.5 μm are beaded with stainless steel beads Grinding to reduce the particle size to 300nm, and mixing with ethanol to prepare a 1.5% silicalite-1 zeolite suspension;

[0037] (3) Apply a layer of ZSM-5 zeolite particles on the alumina carrier by vacuum suction method, set the vacuum degree to 10kPa, and the suction time to 10s, dry at 60°C for 2h, and then send it into the muffle furnace Roast at 450°C for 1h, and the heating and cooling frequency is 1°C / min;

[0038] (4) Immerse the roasted carrier into the silicalite-1 zeolite suspension to coat the surface of the carrier with a layer of silicalite-1 zeolite particles. The immersion time is 10s, and the coating is done twice. Continue to dry for 2h;

...

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PUM

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Abstract

The present invention prepares the silicalite-1 zeolite membrane for dealcoholization on the alumina carrier by the secondary growth method. The difference from the existing calculation is that the used crystal seeds include ZSM-5 zeolite particles and Silicalite zeolite particles. Through reasonable crystallization This coating and treatment improves the separation performance of the silicalite-1 zeolite membrane.

Description

technical field [0001] The invention relates to a preparation method of a zeolite membrane, in particular to a preparation method of a silicalite-1 zeolite membrane for synthesizing dealcoholization on an alumina carrier. Background technique [0002] Zeolite membrane is a new type of inorganic membrane composed of zeolite microcrystals. It has the advantages of both inorganic membrane and zeolite, which makes zeolite membrane have many unique and excellent properties. It has a wide range of applications in industrial fields such as fine chemicals and fine chemicals, especially in the separation of gases and liquids, showing a good application prospect. In the past ten years, people have carried out a lot of research on the synthesis and preparation of zeolite membranes, and a variety of zeolite membranes have been prepared, including LTA, SOD, FAU, MEL, CHA, MFI, DDR, AFI, BEA, PHI et al. Silicalite-1 has an all-silicon MFI configuration with a pore size of about 0.55nm. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D61/36B01D67/00B01D69/04B01D71/02
CPCB01D61/362B01D67/0039B01D69/04B01D71/028
Inventor 不公告发明人
Owner 林贤贵