Preparation method and preparation system of catalytic cracking aid

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

Pending Publication Date: 2022-07-19
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 purposes of the present invention is to provide a simplified process for the complex phosphorus modification process of the MFI molecular sieve in the catalytic crack

Method used

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  • Preparation method and preparation system of catalytic cracking aid
  • Preparation method and preparation system of catalytic cracking aid
  • Preparation method and preparation system of catalytic cracking aid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-1

[0049] 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 impregnation method, impregnated at 20 °C for 2 hours, mixed with kaolin and pseudoboehmite, added decationized water and alumina sol Slurry for 120 minutes , obtain a slurry with a solid content of 30% by weight, add hydrochloric acid to adjust the pH value of the slurry to 3.0, and then continue to beat for 45 minutes, then add a phosphorus-aluminum inorganic binder Binder1, and stir for 30 minutes. , the microspheres were subjected to external pressure and...

Embodiment 1-2

[0055] 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 it up to 100°C for 2h. A sample of catalytic cracking aid was prepared, numbered CEZ1-2. The evaluation is the same as that of Example 1-1, and the results are shown in Table 3.

Embodiment 2-1

[0062] 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 sample of catalytic cracking aid was prepared, numbered CEZ2-1.

[0063] 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 aid. The method is characterized by comprising the following steps: carrying out dipping treatment on an MFI molecular sieve at the temperature of 0-150 DEG C and an aqueous solution of a phosphorus-containing compound at the temperature of 0-150 DEG C to obtain a phosphorus-modified MFI molecular sieve, a binder and optionally added second clay, mixing, 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 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 invention, the preparation process of the catalyst is optimized and shortened, the preparation cost can be reduced, and the prepared catalytic cracking aid has good cracking conversion rate, low-carbon olefin yield and relatively high liquefied gas yield.

Description

technical field [0001] The invention relates to a preparation method and a preparation system of a catalytic cracking aid, and furthermore, the present invention relates to a short-flow preparation method and a preparation system of a catalytic cracking aid of a phosphorus-containing modified MFI molecular sieve. Background technique [0002] ZSM-5 molecular sieve 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. The orifice of ZSM-5 molecular sieve is composed of ten-membered rings, and the size of the orifice is between the small-pore zeolite and the large-pore zeolite, so it has a unique shape-s...

Claims

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Application Information

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IPC IPC(8): B01J29/40C10G11/05
CPCB01J29/40C10G11/05B01J2229/18C10G2400/20C10G2400/26
Inventor 罗一斌欧阳颖王成强邢恩会舒兴田
Owner CHINA PETROLEUM & CHEM CORP
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