Preparation method of sodalite zeolite membrane

A technology of zeolite membrane and sodalite, which is applied in the coating process and coating of metal materials, can solve the problems of high requirements for crystallization kettles and unfavorable treatment area of ​​metal surfaces, etc.

Inactive Publication Date: 2012-12-12
DALIAN POLYTECHNIC UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the synthesized film is obtained by hydrothermal crystallization in a high-pressure reactor, which not only requires higher requirements on the crystallization tank, but also is not conducive to the treatment of large metal surfaces.

Method used

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  • Preparation method of sodalite zeolite membrane
  • Preparation method of sodalite zeolite membrane
  • Preparation method of sodalite zeolite membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Preparation of step 1 reaction precursor

[0032] Weigh 1.5g Na in a beaker 2 SiO 3 9H 2 O, 0.085gNaOH and 0.24gKOH, add 3g deionized water, stir well to make A liquid; weigh 0.695g NaAlO in another beaker 2 , add 2.7g deionized water and stir well to make liquid B; then slowly add liquid A to liquid B and stir quickly to make it evenly mixed to make silica-alumina sol; add 8g [emim] to the above silica-alumina gel Br ionic liquid (that is, liquid 1-ethyl-3-methylimidazolium bromide), and magnetically stirred for 1-2 hours to prepare the reaction precursor.

[0033] Step 2 Vector Pretreatment

[0034]Soak the cut rectangular metal substrate with a length of about 1cm-3cm and a width of about 0.5-1.5cm in 0.1mol / L hydrochloric acid for 1 hour, then rinse it with deionized water until neutral; take it out and soak it in a degreasing agent solution 0.5h, then rinse with deionized water; then use 400#, 600#, 800#, 1200# to smooth the surface of the substrate, and then ...

Embodiment 2

[0039] Preparation of step 1 reaction precursor

[0040] Weigh 1.32g Na in a beaker 2 SiO 3 9H 2 O, 0.065gNaOH and 0.184gKOH, add 2.5g deionized water, stir well to make A liquid; weigh 1g NaAlO in another beaker 2 , add 2.3g deionized water and stir well to make liquid B; then slowly add liquid A to liquid B and stir quickly to make it evenly mixed to make silica-alumina sol; add 6.365g [emim ] Br ionic liquid (that is, liquid 1-ethyl-3-methylimidazolium bromide), and magnetically stirred for 1 to 2 hours to make a reaction precursor.

[0041] Step 2 Vector Pretreatment

[0042] Soak the cut rectangular metal substrate with a length of about 1cm-3cm and a width of about 0.5-1.5cm in 0.1mol / L hydrochloric acid for 1 hour, then rinse it with deionized water until neutral; take it out and soak it in a degreasing agent solution 1h, then rinse with deionized water; then use 400#, 600#, 800#, 1200# to smooth the surface of the substrate, and then put the substrate into the ult...

Embodiment 3

[0046] Preparation of step 1 reaction precursor

[0047] Weigh 2.14g Na in a beaker 2 SiO 3 9H 2 O, 0.21gNaOH and 0.378gKOH, add 5.2g deionized water, stir well to make A liquid; weigh 1.236g NaAlO in another beaker 2 , add 4.3g deionized water and stir well to make liquid B; then slowly add liquid A to liquid B and stir quickly to make it evenly mixed to make silica-alumina sol; add 14.4g [emim ] Br ionic liquid (that is, liquid 1-ethyl-3-methylimidazolium bromide), and stirred for 1 to 2 hours to make the reaction precursor.

[0048] Step 2 Vector Pretreatment

[0049] Soak the cut rectangular metal substrate with a length of about 1cm-3cm and a width of about 0.5-1.5cm in 0.1mol / L hydrochloric acid for 1 hour, then rinse it with deionized water until neutral; take it out and soak it in a degreasing agent solution 0.5h, then rinse with deionized water; then use 400#, 600#, 800#, 1200# to smooth the surface of the substrate, and then put the substrate into the ultrasonic...

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Abstract

The invention provides a method for preparing a sodalite zeolite membrane, specifically comprising the following steps of: preparing a liquid precursor for membrane formation according to the mol ratio of SiO2: (0.65-1)Al2O3: (0.25-0.5)K2O: (0.02-0.35)Na2O: (42-75)H2O: (5-11)[emim]Br; vertically putting a metal base material which is prepared beforehand into the crystallization liquid precursor; and synthesizing the sodalite zeolite membrane in a microwave reactor at the crystallization temperature of 50-90 DEG C for the crystallization time of 60-150 min. The benefit of the invention is that the continuous compact sodalite zeolite membrane is synthesized under the microwave ionothermal condition. The method is carried out in an open system, and the membrane formation process and the materials are both green and environmentally friendly. The synthetic membrane is resistant to high temperature, acid-base corrosion and bioerosion, and has a good application prospect in the aspect of metal anticorrosion.

Description

technical field [0001] The invention belongs to the technical field of inorganic membrane preparation. It specifically relates to the preparation of a sodalite zeolite membrane on the surface of a metal base material, and in particular relates to a method for synthesizing a sodalite zeolite membrane in an open system at normal pressure by means of microwave-assisted ion heating. Background technique [0002] Corrosion of metal materials, especially steel corrosion, has brought huge losses to industrial production and people's lives. In order to reduce this loss, the surface of steel is usually galvanized, and then the surface is treated with chromate to form a chromate conversion film to solve the corrosion problem of steel. Chromate is very toxic and is a carcinogenic and environmentally unfriendly substance. It has a great impact on the environment whether it is in anti-corrosion treatment or in the process of anti-corrosion application. Therefore, it is necessary to res...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C26/00
Inventor 邵国林于春玲宫竹云臧丽君
Owner DALIAN POLYTECHNIC UNIVERSITY
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