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Low-silicon-aluminum-ratio ZSM-12 type zeolite molecular sieve synthesis method

A technology of ZSM-12 and zeolite molecular sieve, which is applied in the direction of ZSM-12 crystalline aluminosilicate zeolite and crystalline aluminosilicate zeolite, can solve the problems of low feasibility and high impurities, and achieve high feasibility and high purity , the effect of low silicon-aluminum ratio

Active Publication Date: 2019-04-23
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is that in the prior art, the feasibility of synthesizing a low-silicon-alumina ratio ZSM-12 type zeolite molecular sieve template agent is low, and the obtained ZSM-12 type zeolite molecular sieve has more impurities. Ammonium salt or quaternary ammonium base is template agent, the method for synthesizing ZSM-12 type zeolite molecular sieve

Method used

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  • Low-silicon-aluminum-ratio ZSM-12 type zeolite molecular sieve synthesis method
  • Low-silicon-aluminum-ratio ZSM-12 type zeolite molecular sieve synthesis method
  • Low-silicon-aluminum-ratio ZSM-12 type zeolite molecular sieve synthesis method

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Experimental program
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Effect test

Embodiment 1

[0024] Mix 40% silica sol, sodium metaaluminate, templating agent Q1, and water in a molar ratio of 1SiO 2 :0.02Al(OH) 3 :0.2 Templating agent Q1:50H 2 O was mixed evenly, and the above mixture was moved into a reaction kettle and crystallized at 170°C for 120 hours. After the reaction was completed, after washing and drying, it was identified as a molecular sieve with a ZSM-12 structure by XRD. The related structure of template agent Q1 is shown in Table 1.

Embodiment 2

[0026] Mix 40% silica sol, alumina, templating agent Q2, and water in a molar ratio of 1SiO 2 :0.04Al(OH) 3 :0.5 Templating agent Q2:100H 2 O was mixed evenly, and the above mixture was moved into a reaction kettle and crystallized at 150°C for 100 hours. After the reaction was completed, after washing and drying, it was identified as a molecular sieve with a ZSM-12 structure by XRD. The related structure of template agent Q2 is shown in Table 1.

Embodiment 3

[0028] Mix 40% silica sol, alumina, templating agent Q2, and water in a molar ratio of 1SiO 2 :0.05Al(OH) 3 :0.25 template Q2:100H 2 O was mixed evenly, and the above mixture was moved into a reaction kettle and crystallized at 150°C for 120 hours. After the reaction was completed, after washing and drying, it was identified as a molecular sieve with a ZSM-12 structure by XRD. The related structure of template agent Q2 is shown in Table 1.

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Abstract

The invention relates to a low-silicon-aluminum-ratio ZSM-12 type zeolite molecular sieve synthesis method. In the prior art, the templating agent for synthesizing the low-silicon-aluminum-ratio ZSM-12 type zeolite molecular sieve has low feasibility, and the obtained ZSM-12 type zeolite molecular sieve has more impurities. A purpose of the present invention is mainly to solve the problems in theprior art. According to the technical scheme, the method comprises: uniformly mixing a silicon source, an aluminum source, a templating agent Q and water according to a molar ratio of SiO2 to Al(OH)3to the templating agent Q to H2O of 1:(0.02-0.2):(0.1-2.0):(30-200) to obtain a mixture, carrying out hydrothermal crystallization on the mixture for 20-200 h at a temperature of 95-180 DEG C, washingthe obtained product, and drying to obtain the low silicon-aluminum-ratio ZSM-12 type zeolite molecular sieve. With the technical scheme, the problem in the prior art can be well solved. The obtainedproduct of the present invention can be used in industrial catalytic applications.

Description

technical field [0001] The invention relates to a method for synthesizing ZSM-12 zeolite molecular sieve with low silicon-aluminum ratio, belonging to the technical field of molecular sieve synthesis. Background technique [0002] Zeolite molecular sieves are widely used due to their unique pore shape selectivity, unique solid acid properties and excellent ion exchange properties, and have shown their great commercial application value in adsorption, separation and catalysis. For example, in the field of petroleum refining and chemical industry, the application of Y zeolite has brought a sudden revolution to petroleum catalytic cracking technology, while other molecular sieve catalysts, such as ZSM-5 zeolite, mordenite, β zeolite, MCM-22 zeolite , The application of SAPO-34 molecular sieves has also brought substantial breakthroughs to important petroleum refining and chemical technologies such as cracking, reforming, isomerization, aromatics disproportionation and alkylatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B39/42
CPCC01B39/42C01P2004/62C01P2004/03
Inventor 沈少春杨为民王振东李应成沙鸥汪莹莹
Owner CHINA PETROLEUM & CHEM CORP
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