Preparation method of catalyst for improving yield of gasoline produced by catalytic cracking

A catalytic cracking gasoline and catalytic cracking technology, which is applied in the field of in-situ crystallization catalytic cracking catalyst and its preparation, and can solve problems such as complicated procedures and poor strength

Active Publication Date: 2015-01-14
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The above-mentioned patents have achieved certain effects in improving the gasoline yield, but most of the patents are prepared by the semi-synthetic binder method. The shortcomings of this proce

Method used

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  • Preparation method of catalyst for improving yield of gasoline produced by catalytic cracking
  • Preparation method of catalyst for improving yield of gasoline produced by catalytic cracking
  • Preparation method of catalyst for improving yield of gasoline produced by catalytic cracking

Examples

Experimental program
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Effect test

Embodiment 1

[0041] Mix the sulfuric acid solution with an acid concentration of 1.75mol / L and diatomite, and then treat it at 60°C and pH 3.8 for 4 minutes, filter, wash, and dry, and then add 500g of kaolin (calcium base), acid-treated 200 grams of diatomaceous earth (calcium base), 4% sodium silicate, 5% zinc chloride as a structural aid, and chemical water were prepared to form a mixed slurry with a solid content of 46%, and spray-dried to obtain 625g of Spray microspheres TS1.

[0042] A part of TS1 spray soil balls was roasted at 917°C for 2.5h to obtain roasted microspheres TM1, and the other part was roasted at 660°C for 2.9h to obtain roasted microspheres TP1, then mixed 400g TM1 and 600g TP1 and added sodium silicate, The directing agent, sodium hydroxide solution, and chemical water are used for in-situ crystallization reaction to obtain the crystallized product J1.

Embodiment 2

[0044] Mix the nitric acid solution with an acid concentration of 4mol / L and diatomaceous earth at 87°C for 20 minutes, and control the pH value at 4.0. Prepare a mixed slurry with a solid content of 33% from 900 grams of soil (calcium base), 8% aluminum sol, 0.8% magnesium nitrate as a structural aid, and chemical water, and spray dry to obtain 1530 g of spray microspheres TS2 with a particle size of 20-110 μm. .

[0045] The TS2 spray soil balls were calcined at 980°C for 2 hours to obtain the calcined microspheres TM2. Add 500g of TM2 to sodium silicate, directing agent, sodium hydroxide solution, and chemical water to carry out in-situ crystallization reaction to obtain the crystallized product J2.

Embodiment 3

[0047] Mix the citric acid solution with an acid concentration of 15mol / L and diatomaceous earth, and then treat it at 65°C and pH 4.5 for 60 minutes, filter, wash, and dry, then add 400g of kaolin (calcium base), acid-treated diatomaceous 800 grams of soil (calcium base), 3% sodium silicate, 10% silica sol, 2.5% lanthanum nitrate as a structural aid, and chemical water were prepared into a mixed slurry with a solid content of 40%, spray-dried to obtain 1182g of particles with a particle size of 20-20 110 μm spray microspheres TS3.

[0048] A part of TS3 was calcined at 920°C for 2.5h to obtain calcined microspheres TM3, and the other part was calcined at 730°C for 2.8h to obtain calcined microspheres TP3, then 150g TM3 and 750g TP3 were added to sodium silicate, directing agent, hydroxide Sodium solution and chemical water are used for in-situ crystallization reaction to obtain the crystallized product J3.

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Abstract

The invention discloses a preparation method of a catalyst for improving the yield of gasoline produced by catalytic cracking. The preparation method comprises the following steps: with a mixture of kaolin and diatomite subjected to acid treatment as a raw material, adding chemical water, structural auxiliaries, a dispersing agent and/or a reinforcing agent into the mixture, and performing mixed pulping and spraying to obtain microspheres; roasting the sprayed microspheres, mixing the roasted microspheres with a guiding agent, sodium silicate and sodium hydroxide in a certain ratio, and performing a crystallization reaction under hydrothermal conditions, thereby obtaining a crystallization product with a pore structure and excellent abrasion resistance and with a 30%-60% NaY molecular sieve, wherein the crystallization product, namely the in-situ crystallized microspheres, can be taken as a precursor for preparing the catalytic cracking catalyst; and exchanging the in-situ crystallized microspheres with ammonium salt and rare earth to obtain the catalytic cracking catalyst for improving the yield of gasoline.

Description

technical field [0001] The invention relates to a preparation method of an oil refining catalyst, and more specifically relates to an in-situ crystallization type catalytic cracking catalyst and a preparation method thereof. Background technique [0002] The purpose of the fluidized catalytic cracking (FCC) reaction is the process of producing gasoline, diesel, liquefied gas and other small molecular products through catalytic reactions of heavy raw materials with large molecules. As crude oil becomes heavier and worse, increasing the processing ratio of macromolecular heavy oil, especially residual oil, in the FCC process is of great significance for improving the economic benefits of refineries. Taking a heavy oil catalytic cracking unit with a processing capacity of 3 million tons per year as an example, by increasing the conversion capacity of heavy oil, the yield of the target product can be increased by 1 percentage point, and the direct economic benefits will increase...

Claims

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Application Information

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IPC IPC(8): B01J29/08C10G11/05
Inventor 张莉刘宏海高雄厚赵晓争胡清勋熊晓云赵红娟田爱珍王林王宝杰
Owner PETROCHINA CO LTD
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