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Preparation method of compound porous molecular sieve catalyst

A catalyst and molecular sieve technology, applied in molecular sieve catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of no environmental protection benefit, high cost, large amount of waste liquid, etc., achieve good environmental protection benefits and reduce waste liquid. The effect of generating and improving the efficiency of use

Active Publication Date: 2015-04-29
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is that the prior art has the problems of high cost, large amount of waste liquid, and no environmental benefits, and provides a new method for preparing a composite pore molecular sieve catalyst

Method used

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  • Preparation method of compound porous molecular sieve catalyst
  • Preparation method of compound porous molecular sieve catalyst
  • Preparation method of compound porous molecular sieve catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Mix 1 gram of aluminum acetate, 100 grams of silica gel, 14 grams of polyethylene glycol, 3.4 grams of potassium hydroxide and 220 grams of water and stir evenly; stir the mixed solution at 60°C for 20 hours, then seal and age for 50 hours to obtain the precursor A: Precursor A is subjected to solution-free crystallization treatment, including two steps of heating treatment and crystallization treatment. First, the heating treatment temperature is 100 ° C for 12 hours; the crystallization treatment temperature is 170 ° C and the time is 15 hours. The pressure is 1.5 MPa to obtain the precursor B; finally the precursor B is calcined at 600° C. for 8 hours in the air atmosphere to obtain the composite pore molecular sieve catalyst of the present invention.

[0025] The XRD spectrum data of the product are shown in Table 1, and the XRD spectrum is as follows figure 1 shown. The particle size of the product is 1.2 microns, and the pore volume of the macropores of 0.5-10 mi...

Embodiment 2~10

[0029] According to the synthesis steps described in [Example 1], the types and amounts of M sources, silicon sources, surfactants, and mineralizers (sodium hydroxide is abbreviated as NaOH, and ethyl ammonium hydroxide is abbreviated as TEAOH) are changed, and the preparation conditions are adjusted. , can be synthesized to obtain the composite pore molecular sieve catalyst of the present invention. Catalyst formulations, preparation conditions and structural composition features are shown in Table 2 and Table 3. The catalyst evaluation method is the same as [Example 1], and the catalytic reaction evaluation results are shown in Table 4.

[0030]

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Abstract

The invention relates to a preparation method of a compound porous molecular sieve catalyst. According to the preparation method, the problems that the cost is high, the effluent quantity is large and the benefit of environmental protection is not achieved in the prior art are mainly solved. The preparation method comprises the following steps: (a) carrying out sealing aging on a mixture of an M source, a silicon source, a surfactant and a mineralizing agent for 5-200 hours at 20-95 DEG C, so as to obtain a precursor A; (b) carrying out solution-free crystallization on the precursor A, firstly processing the precursor A at 60-140 DEG C for 2-50 hours, and then processing the precursor A at the temperature of 140-250 DEGC and the pressure of 0.3MPa-12MPa for 2-50 hours, so as to obtain a precursor B; and (c) calcining the precursor B at 300-1000 DEG C for 3-10 hours so as to obtain the compound porous molecular sieve catalyst. According to the technical scheme, the problems are well solved. The preparation method can be applied to the industrial production for preparing the compound porous molecular sieve catalyst.

Description

technical field [0001] The invention relates to a preparation method of a composite pore molecular sieve catalyst. Background technique [0002] Zeolite molecular sieves have been widely used in industry as traditional solid acid catalysts. However, due to their small pore size, the difficulty of diffusion of reactants and products in the pores seriously affects the catalytic efficiency. Therefore, molecular sieves are used in catalytic processes involving macromolecules. There are certain limitations in . For example, in heavy oil fractions, large-sized molecules occupy a considerable proportion. To crack heavy oil, large molecules must be able to contact the active surface, and the narrow pore structure of zeolite molecular sieves makes it difficult to meet the above requirements. The same is true for esterification, alkylation, and selective oxidation reactions involving macromolecules. Therefore, it is necessary to get rid of the limitation of diffusion and mass transfe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/00B01J35/10
Inventor 周健刘志成贾银娟高焕新
Owner CHINA PETROLEUM & CHEM CORP
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