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Preparation method of bulk beta-zsm-12 symbiotic molecular sieve

A symbiotic molecular sieve and block technology, applied in the direction of crystalline aluminosilicate zeolite, etc., can solve the problems of complex preparation, single shape of symbiotic molecular sieve, high cost, etc., to reduce the amount of template agent, easy to operate, and reduce pollutant emissions Effect

Active Publication Date: 2019-01-25
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] One of the technical problems to be solved by the present invention is to provide a new Beta-ZSM-12 symbiotic molecular sieve for the problems that the symbiotic molecular sieve synthesized by the prior art has a single shape, complex preparation and high cost

Method used

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  • Preparation method of bulk beta-zsm-12 symbiotic molecular sieve
  • Preparation method of bulk beta-zsm-12 symbiotic molecular sieve

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Experimental program
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Effect test

Embodiment 1

[0029] The molar ratio of NaOH, tetraethylammonium hydroxide, silica gel, pseudoboehmite and deionized water is calculated as: SiO 2 / Al 2 o 3 =35:1, TPA + / SiO 2 = 0.125: 1, OH - / SiO 2 =0.1:1,H 2 O / SiO 2 = 15:1 mixing, stirring at 70°C, aging, and evaporating solvent; when the water content is lower than 30wt%, put it in a closed container and conduct crystallization treatment at 160°C under autogenous pressure for 72 hours; crystallize well The product was taken out after cooling, washed with water, filtered, dried, and calcined at 550°C for 4 hours in an air atmosphere to obtain a block Beta-ZSM-12 symbiotic molecular sieve. , There are characteristic diffraction peaks at 18.79, 20.88, 22.41, 23.07, 25.71, 26.40, and 35.58, and the average particle size is 3 μm.

Embodiment 2

[0031] The molar ratio of NaOH, tetraethylammonium hydroxide, water glass, sodium metaaluminate and deionized water is calculated as: SiO 2 / Al 2 o 3 =35:1, TPA + / SiO 2 = 0.125: 1, OH - / SiO 2 =0.1:1,H 2 O / SiO 2 = 15:1 mixing, stirring at 70°C, aging, and evaporating solvent; when the water content is lower than 30wt%, put it in a closed container and conduct crystallization treatment at 160°C under autogenous pressure for 72 hours; crystallize well The product was taken out after cooling, washed with water, filtered, dried, and calcined at 550°C for 4 hours in an air atmosphere to obtain a block Beta-ZSM-12 symbiotic molecular sieve. , There are characteristic diffraction peaks at 18.80, 20.87, 22.41, 23.06, 25.72, 26.41, and 35.58, and the average particle size is 2.9 μm.

Embodiment 3

[0033] The molar ratio of NaOH, tetraethylammonium hydroxide, silica gel, pseudoboehmite and deionized water is calculated as: SiO 2 / Al 2 o 3 =50:1, TPA + / SiO 2 = 0.125: 1, OH - / SiO 2 =0.1:1,H 2 O / SiO 2 = 15:1 mixing, stirring at 70°C, aging, and evaporating solvent; when the water content is lower than 30wt%, put it in a closed container and conduct crystallization treatment at 160°C under autogenous pressure for 72 hours; crystallize well The product was taken out after cooling, washed with water, filtered, dried, and calcined at 550°C for 4 hours in an air atmosphere to obtain a block Beta-ZSM-12 symbiotic molecular sieve. , There are characteristic diffraction peaks at 18.80, 20.90, 22.39, 23.07, 25.71, 26.41, and 35.59, and the average particle size is 2.8 μm.

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Abstract

The invention relates to a block symbiotic molecular sieve Beta-ZSM-12 preparation method and mainly aims to solve problems that according to the existing symbiotic molecular sieve synthetized by the prior art, the appearance is simplex, the preparation is complex and the cost is high. By the solvent evaporation method, the materials of symbiotic molecular sieve Beta-ZSM-12 are prepared, the phase ratio of the symbiotic materials is adjustable, the synthetized symbiotic materials include components of nSiO2 : Al2O3 according to the molar relations, n ranges from 4 to 70, the XRD diffraction pattern 2 theta is provided with characteristic diffraction peaks in locations of 7.45 + / - 0.02, 7.62 + / - 0.03, 8.83 + / - 0.03, 14.77 + / - 0.03, 15.28 + / - 0.02, 18.79 + / - 0.03, 20.88 + / - 0.03, 22.41 + / - 0.02, 23.07 + / - 0.03, 25.71 + / - 0.02, 26.40 + / - 0.02 and 35.58 + / - 0.02. The problems can be solved, and the symbiotic materials can be applied to the fields of catalysis, adsorption and separation.

Description

technical field [0001] The invention relates to a method for preparing block Beta-ZSM-12 symbiotic molecular sieves. Background technique [0002] Zeolite molecular sieve has a regular and uniform pore structure, good stability and adjustable denaturation. As an adsorbent, ion exchanger and catalyst with excellent performance, it has been widely used in environmental protection, petroleum refining, petrochemical and other fields. In 1973, Rosinski and Rubin of Mobile Laboratory in the United States synthesized ZSM-12 molecular sieve for the first time. Its structure type is MTW type, and it has a one-dimensional linear non-intersecting channel composed of twelve-membered rings. The pore size is 0.57x0.61nm, which belongs to the high silicon category. Zeolite. This molecular sieve material with large pores can effectively realize the shape-selective catalytic conversion of most organic molecules, and exhibits excellent catalytic performance in reactions such as aromatic hydr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B39/04
Inventor 李旭光孔德金邹薇周亚新
Owner CHINA PETROLEUM & CHEM CORP