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Preparation method and preparation system of catalytic cracking catalyst of phosphorus-containing modified MFI structure molecular sieve

A catalytic cracking and molecular sieve technology, applied in molecular sieve catalysts, catalytic cracking, physical/chemical process catalysts, etc., can solve the problems of complex preparation process of cracking catalysts and complex phosphorus modification process

Active Publication Date: 2022-07-19
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] One of the purposes of the present invention is to solve the problem that the phosphorus modification process of the phosphorus-modified MFI molecular sieve described in the catalytic cracking catalyst in the prior art is complicated in order to improve its hydrothermal stability and the preparation process of the cracking catalyst is complicated, and provide A kind of preparation method of cracking catalyst with simplified process

Method used

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  • Preparation method and preparation system of catalytic cracking catalyst of phosphorus-containing modified MFI structure molecular sieve
  • Preparation method and preparation system of catalytic cracking catalyst of phosphorus-containing modified MFI structure molecular sieve
  • Preparation method and preparation system of catalytic cracking catalyst of phosphorus-containing modified MFI structure molecular sieve

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-1

[0047] Dissolve 16.2 g of diammonium hydrogen phosphate (Tianjin Guangfu Technology Development Co., Ltd., analytically pure, the same below) in 60 g of deionized water, stir for 0.5 h to obtain a phosphorus-containing aqueous solution, add 113 g of HZSM-5 molecular sieve (Sinopec Catalyst Company Qilu Branch supplied with a relative crystallinity of 91.1%, a silica / alumina molar ratio of 24.1, Na 2 O content is 0.039wt%, specific surface area is 353m 2 / g, the total pore volume is 0.177ml / g, the same below), modified by dipping method, after dipping at 20 °C for 2 hours, it is mixed with Y-type molecular sieve (PSRY molecular sieve), kaolin and pseudo-boehmite, and decationized Water and aluminum sol were beaten for 120 minutes to obtain a slurry with a solid content of 30% by weight. Hydrochloric acid was added to adjust the pH value of the slurry to 3.0, and then the beating was continued for 45 minutes. Spray drying and molding to obtain microspheres. The microspheres are...

Embodiment 1-2

[0053] The same as Example 1-1, the difference is that the phosphorus-modified molecular sieve mixes diammonium hydrogen phosphate, HZSM-5 molecular sieve and water into a slurry, and then heats up to 100 ° C for 2 hours. A catalytic cracking catalyst sample was prepared, numbered CFZY1-2. The evaluation is the same as that of Example 1-1, and the results are shown in Table 3.

Embodiment 2-1

[0060] Same as Example 1-1, the difference is that 16.2g of diammonium hydrogen phosphate was dissolved in 120g of deionized water at 50°C, stirred for 0.5h to obtain a phosphorus-containing aqueous solution, added with 113g of HZSM-5 molecular sieve, modified by impregnation method, Immersion at 20°C for 2 hours; external pressure is applied and water is added, and pressurized hydrothermal calcination is carried out at 600°C, 0.5Mpa, 30% steam atmosphere for 2h. A catalytic cracking catalyst sample was prepared, numbered CFZY2-1.

[0061] The evaluation is the same as that of Example 1-1, and the results are shown in Table 4.

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Abstract

The invention provides a preparation method of a catalytic cracking catalyst, which is characterized by comprising the following steps: mixing a phosphorus-modified MFI structure molecular sieve, a Y-type molecular sieve, an inorganic binder and optionally added second clay, pulping and molding, carrying out hydrothermal roasting treatment on the molded product in an atmosphere environment of externally applying pressure and externally adding an aqueous solution; the phosphorus-modified MFI structure molecular sieve is obtained by contacting an MFI structure molecular sieve at the temperature of 0-150 DEG C with a phosphorus-containing compound aqueous solution at the temperature of 0-150 DEG C through an impregnation method; the apparent pressure of the hydrothermal roasting treatment is 0.01-1.0 Mpa, and the hydrothermal roasting treatment contains 1-100% of water vapor; the hydrothermal roasting treatment is carried out at the temperature of 200 to 800 DEG C. According to the present invention, the catalyst preparation process is optimized and shortened, the preparation cost can be reduced, and the catalytic cracking catalyst has advantages of excellent cracking conversion rate, excellent low-carbon olefin yield and high liquefied gas yield in the petroleum hydrocarbon catalytic cracking reaction.

Description

technical field [0001] The invention relates to a preparation method and preparation system of a catalytic cracking catalyst, and furthermore, the present invention relates to a short process preparation method and preparation system of a catalytic cracking catalyst containing phosphorus-modified MFI molecular sieve. Background technique [0002] ZSM-5 molecular sieve with MFI structure is a widely used zeolite molecular sieve catalytic material developed by Mobil Corporation of the United States in 1972. The molecular sieve has a three-dimensional crossed channel structure, the channels along the a-axis are straight pores, and the cross-sectional size is 0.54×0.56nm, which is approximately circular, and the channels along the b-axis are zigzag pores, and its cross-sectional size is 0.51×0.56 nm, is an ellipse. Its pore is composed of ten-membered rings, and its size is between the small-pore zeolite and the large-pore zeolite, so this type of molecular sieve has a unique s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/80C10G11/05
CPCB01J29/80C10G11/05B01J29/084B01J29/40B01J2229/18C10G2400/20C10G2400/26Y02P20/52
Inventor 罗一斌王成强欧阳颖邢恩会舒兴田
Owner CHINA PETROLEUM & CHEM CORP
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