Core-shell metal hybrid silicate-1/SAPO-5 composite molecular sieve ceramic membrane and preparation method thereof

A SAPO-5, composite molecular sieve technology, applied in catalyst activation/preparation, molecular sieve catalysts, chemical instruments and methods, etc., can solve the problems of long time, low film formation rate, high energy consumption, delay deactivation, reduce preparation cost, the effect of improving completeness

Active Publication Date: 2018-11-16
GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The traditional hydrothermal synthesis method for preparing molecular sieve membranes has the disadvantage

Method used

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  • Core-shell metal hybrid silicate-1/SAPO-5 composite molecular sieve ceramic membrane and preparation method thereof
  • Core-shell metal hybrid silicate-1/SAPO-5 composite molecular sieve ceramic membrane and preparation method thereof
  • Core-shell metal hybrid silicate-1/SAPO-5 composite molecular sieve ceramic membrane and preparation method thereof

Examples

Experimental program
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Example Embodiment

[0033] The preparation method of a core-shell metal hybrid silicate-1 / SAPO-5 composite molecular sieve ceramic membrane provided by the present invention includes the following steps:

[0034] 1. Preparation of silicate-1 molecular sieve synthesis solution: using silicon source, organic template, transition metal salt and water as raw materials, the molar composition of the raw materials of the reaction system is calculated as oxide: SiO 2 : ATemplate: bH 2 O: cX, a=0.001~0.03, b=40~1000, c=0.015~0.1, X is a transition metal salt, the transition metal is selected from Fe, Co or Ni; the organic template is selected from tetrapropyl hydrogen Ammonium oxide (TPAOH), tetrapropylammonium bromide (TPABr), triphenylamine (TPA) or triethylamine (TEA), and the silicon source is selected from ethyl orthosilicate, silica sol, silicic acid or water glass.

[0035] According to the above-mentioned ratio and dosage, under stirring, add the weighed silicon source dropwise to water and stir until i...

Example Embodiment

[0044] Example 1

[0045] (1) Preparation of Co hybrid silicate-1 molecular sieve synthesis solution

[0046] According to SiO 2 :0.001TPABr:40H 2 O:0.1Co(NO 3 ) 3 (mol) material ratio to prepare Co hybrid silicate-1 molecular sieve synthesis solution, silicon source is ethyl orthosilicate, according to the above material ratio, add ethyl orthosilicate under stirring conditions, and stir to dissolve for 5 hours , It is completely hydrolyzed to obtain the ethyl orthosilicate aqueous solution, after the ethyl orthosilicate aqueous solution is clarified, add Co(NO 3 ) 3 And TPABr, stirring and dissolving for 3 hours, after the substances are completely dissolved, adjust the pH of the reaction solution to between 10-12 to obtain the Co hybrid silicate-1 molecular sieve synthesis solution.

[0047] (2) Preparation of Co hybrid SAPO-5 molecular sieve synthesis solution

[0048] Follow Al 2 O 3 :1.3P 2 O 5 :0.5SiO 2 :3TPABr:1000H 2 O:0.075Co(NO 3 ) 3 (mol) of the material ratio to prepare th...

Example Embodiment

[0063] Example 2

[0064] (1) Preparation of Fe hybrid silicate-1 molecular sieve synthesis solution

[0065] It is basically the same as Example 1, except that in the process of preparing silicate-1 molecular sieve, the silicon source used is silica sol, and the material formula of the synthetic liquid is SiO 2 : 0.03TPAOH: 1000H 2 O: 0.015FeCl 3 .

[0066] (2) Preparation of Fe hybrid SAPO-5 molecular sieve synthesis solution

[0067] Basically the same as Example 1, except that during the preparation process of Fe hybrid SAPO-5 molecular sieve synthesis solution, the aluminum source, silicon source, organic template and active metal used are sodium aluminate, silica sol, TPA and Ferric chloride, material formula is Al 2 O 3 :0.8P 2 O 5 :0.05SiO 2 :0.75TPA:45H 2 O:0.3FeCl 3 .

[0068] (3) Preparation of Fe hybrid core-shell silica-1 / SAPO-5 composite molecular sieve seeds

[0069] The reaction temperature of Fe hybrid silicate-1 molecular sieve synthesis solution is set to 200℃, and th...

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Abstract

The invention relates to a core-shell metal hybrid silicate-1/SAPO-5 composite molecular sieve ceramic membrane and a preparation method thereof. The preparation method of the core-shell metal hybridsilicate-1/SAPO-5 composite molecular sieve ceramic membrane comprises the following steps: (1) preparing a silicate-1 molecular sieve synthesis solution; (2) preparing an SAPO-5 molecular sieve synthesis solution; (3) preparing core-shell metal hybrid silicate-1/SAPO-5 molecular sieve composite seed crystals; (4) preparing the core-shell metal hybrid silicate-1/SAPO-5 composite molecular sieve ceramic membrane. The preparation method is simple in process, shorter in consumed time, lower in cost and higher in membrane forming rate.

Description

technical field [0001] The invention belongs to the technical fields of inorganic porous materials, membrane separation and membrane catalysis, and in particular relates to a core-shell metal hybrid silicate-1 / SAPO-5 composite molecular sieve ceramic membrane and a preparation method thereof. Background technique [0002] Composite molecular sieves use special synthesis techniques to combine molecular sieves with different pore structures and acidities to shorten the distance between different types of molecular sieves. No synergistic catalytic performance. The multiple stacked structure of composite molecular sieves can avoid the defects of single pore structure. The multi-level pore system can provide pores with different sizes, which can effectively solve the problem of mass transfer in the reaction process. application prospects. [0003] silicate-1 molecular sieve is a molecular sieve with a unique high-silicon three-dimensional cross-straight channel, with a pore siz...

Claims

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Application Information

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IPC IPC(8): B01J29/00B01J35/06B01J37/34C10G11/05
CPCB01J29/005B01J29/04B01J29/85B01J35/065B01J37/346B01J2229/186C10G11/05
Inventor 杨文申谢建军阴秀丽吴创之
Owner GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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