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Synthesis method of BEC molecular sieve and synthesized BEC molecular sieve

A synthesis method and technology of molecular sieves, applied in the direction of molecular sieves and base exchange compounds, molecular sieve catalysts, chemical instruments and methods, etc., can solve the problems of poor stability and low purity of BEC molecular sieve products, and achieve stable structure, simple method and high product purity Effect

Active Publication Date: 2020-05-05
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] One of the technical problems to be solved by the present invention is that the existing technology has the problem of low purity and poor stability of the synthesized BEC molecular sieve product, and a new synthesis method of BEC molecular sieve is provided

Method used

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  • Synthesis method of BEC molecular sieve and synthesized BEC molecular sieve
  • Synthesis method of BEC molecular sieve and synthesized BEC molecular sieve
  • Synthesis method of BEC molecular sieve and synthesized BEC molecular sieve

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] 133.3 grams of organic template (R) 1,1'-[(1,4-phenylene bis(methylene)] bis(1-methylpiperidin-1-ium) cation base (19.0% by weight ) with 8.72g GeO 2 (99.99% by weight), 37.5g silica sol (SiO 2 40.0% by weight), 7.5g HF solution (40.0% by weight) are mixed homogeneously, then the mixture is removed 89.97g water by evaporation in 80 ℃ of water baths, makes reaction mixture, and the material ratio (mol ratio) of reaction mixture is:

[0046] SiO 2 / GeO 2 =3

[0047] R / SiO 2 =0.3

[0048] HF / SiO2 2 =0.6

[0049] h 2 O / SiO 2 =10

[0050] After mixing evenly, put it into a stainless steel reaction kettle, and crystallize at 150°C for 5 days while stirring. After the crystallization, filter, wash, and dry to obtain the synthesized BEC molecular sieve, the XRD of the sample is as follows: figure 1 As shown, the BEC molecular sieves were obtained by calcining in air at 550°C for 5 hours. The XRD of the product is as figure 2 As shown, the BEC molecular sieve cont...

Embodiment 2

[0052] 177.7 grams of organic templating agent (R) 1,1'-[(1,4-phenylenebis(methylene)]bis(1-methylpiperidin-1-ium) cation base (19.0% by weight ) with 26.16g GeO 2 (99.99% by weight), 37.5g silica sol (SiO 2 40.0% by weight), 10.0g HF solution (40.0% by weight) are mixed homogeneously, then the mixture is removed 127.13g water by evaporation in 80 ℃ of water baths, makes reaction mixture, and the material ratio (molar ratio) of reactant is: SiO 2 / GeO 2 = 1, R / SiO 2 =0.4, HF / SiO 2 =0.8,H 2 O / SiO 2 =8, crystallized at 160°C for 5 days. The BEC molecular sieve content in the product is 97.6% by weight.

Embodiment 3

[0054] 88.865 grams of organic template (R) 1,1'-[(1,4-phenylene bis(methylene)] bis(1-methylpiperidin-1-ium) cation base (19.0% by weight ) with 10.464g GeO 2 (99.99% by weight), 37.5g silica sol (SiO 2 40.0% by weight), 5.0g HF solution (40.0% by weight) are mixed homogeneously, then the mixture is removed 74.7g water by evaporation in 80 ℃ of water baths, makes reaction mixture, the material ratio (molar ratio) of reactant is: SiO 2 / GeO 2 =2.5, R / SiO 2 =0.2, HF / SiO 2 =0.4,H 2 O / SiO 2 =5, crystallized at 150°C for 6 days. The BEC molecular sieve content in the product is 98.3% by weight.

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Abstract

The invention relates to a synthesis method of BEC molecular sieve and the synthesized BEC molecular sieve, and mainly solves the problems of low purity and poor thermal stability of the synthesized BEC molecular sieve product in the prior art. The method comprises the step of contacting a silicon source, a germanium source, an organic template agent and water under a crystallization condition toobtain the molecular sieve, and optionally, a step of roasting the obtained molecular sieve; wherein the organic template agent R is selected from 1, 1 '-[(1, 4-phenylene bis (methylene)] bis (1-methylpiperidine-1-onium) cations, and the problem is better solved by adopting the technical scheme.

Description

technical field [0001] The invention relates to a method for synthesizing a BEC molecular sieve and the synthesized BEC molecular sieve. Background technique [0002] In industry, porous inorganic materials are widely used as catalysts and catalyst supports. Porous materials have relatively high specific surface area and smooth pore structure, so they are good catalytic materials or catalyst supports. Porous materials generally include: amorphous porous materials, crystalline molecular sieves, and modified layered materials. Subtle differences in the structure of these materials portend significant differences in their own catalytic and adsorption properties of the materials, as well as differences in the various observable properties used to characterize them, such as their morphology, specific surface area, porosity dimensions and the variability of those dimensions. [0003] The basic framework structure of crystalline microporous zeolite is based on a rigid three-dime...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B39/48C01B39/04B01J29/70B01J20/18B01J20/30
CPCB01J20/18B01J29/70C01B39/04C01B39/48C01P2002/72
Inventor 王振东杨为民沈少春汪莹莹付文华陶伟川
Owner CHINA PETROLEUM & CHEM CORP
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