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Synthesis method of zsm-12 zeolite molecular sieve with low silicon-aluminum ratio

A ZSM-12, zeolite molecular sieve technology, applied in ZSM-12 type crystalline aluminosilicate zeolite, crystalline aluminosilicate zeolite and other directions, can solve the problems of low feasibility and many impurities, and achieve high feasibility and high purity , the effect of low silicon to aluminum ratio

Active Publication Date: 2022-04-01
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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  • Synthesis method of zsm-12 zeolite molecular sieve with low silicon-aluminum ratio
  • Synthesis method of zsm-12 zeolite molecular sieve with low silicon-aluminum ratio
  • Synthesis method of zsm-12 zeolite molecular sieve with low silicon-aluminum ratio

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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 method for synthesizing a ZSM-12 zeolite molecular sieve with a low silicon-aluminum ratio, which mainly solves the low feasibility of the template agent used in synthesizing a low-silicon-aluminum ratio ZSM-12 type zeolite molecular sieve in the prior art, and the obtained ZSM-12 type Zeolite molecular sieve has more impurities. The present invention adopts according to 1SiO 2 :(0.02~0.2)Al(OH) 3 :(0.1~2.0) Template Q:(30~200)H 2 The initial molar ratio of O, the silicon source, the aluminum source, the template Q and water are uniformly mixed to obtain a mixture, and then the mixture is hydrothermally crystallized at 95-180°C for 20-200 hours, and the obtained product is washed and dried. The technical solution for obtaining a ZSM‑12 zeolite molecular sieve with a low silicon-aluminum ratio better solves this technical problem and 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 Patents(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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