A preparation method of a catalyst for improving the yield of catalytic cracking diesel oil

A catalytic cracking diesel and catalytic cracking technology, which is applied in the field of in-situ crystallization type catalytic cracking catalyst and its preparation, can solve the problems of complex procedures, unenvironmental strength and the like, and achieves good pore structure, rich specific surface and strong heavy oil conversion ability. Effect

Active Publication Date: 2016-05-11
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in terms of pore structure design, it mainly depends on the pore channel formed by the chemical silicon oxide formed after kaolin is thermally converted and extracted in an alkaline system, or depends on the accumulation gap between kaolin particles or the addition of organic matter after thermal extraction. Improve the porosity, but there are disadvantages in the process, such as complicated procedures, environmental protection or poor strength

Method used

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  • A preparation method of a catalyst for improving the yield of catalytic cracking diesel oil
  • A preparation method of a catalyst for improving the yield of catalytic cracking diesel oil
  • A preparation method of a catalyst for improving the yield of catalytic cracking diesel oil

Examples

Experimental program
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Effect test

Embodiment 1

[0046] Mix the phosphoric acid solution with an acid concentration of 0.75mol / L and diatomaceous earth, and then treat it at 50°C and pH 4.2 for 10 minutes, filter, wash, and dry, and then add 2000g of kaolin (calcium base), acid-treated 950 grams of diatomaceous earth (calcium base), 4% sodium silicate, 8% zinc nitrate 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 2225g of spray particles with a particle size of 20-110μm Microsphere TS1.

[0047] A part of TS1 spray soil balls was roasted at 925°C for 2.6h to obtain roasted microspheres TM1, and the other part was roasted at 650°C for 2.8h to obtain roasted microspheres TP1, then mixed 200g of TM1 and 300g of TP1 and added sodium silicate and directing agent , sodium hydroxide solution, and chemical water for in-situ crystallization reaction to obtain crystallized product J1.

Embodiment 2

[0049] Mix sulfuric acid solution with an acid concentration of 3mol / L and diatomite at 90°C for 15 minutes, and control the pH value at 3.5. 900 g of soil (calcium base), 6% of aluminum sol, 0.5% of magnesium nitrate as a structural aid, and chemical water were prepared to form a mixed slurry with a solid content of 32%, and spray-dried to obtain 1130 g of spray microspheres TS2 with a particle size of 20-110 μm .

[0050] The TS2 spray soil balls were calcined at 990°C for 1.5h to obtain the calcined microspheres TM2. Add 800g 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

[0052] Mix the acetic acid solution with an acid concentration of 5mol / L and diatomite and treat it at 75°C and pH 3.8 for 45 minutes. 1200g (calcium base), 6% sodium silicate, 2% lanthanum nitrate as a structural aid, and chemical water to prepare a mixed slurry with a solid content of 40%, and spray drying to obtain 1582g of spray microspheres TS3 with a particle size of 20-110 μm .

[0053] 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 750gTP3 were added to sodium silicate, directing agent, and sodium hydroxide solution and chemical water 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 diesel oil 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 20%-30% 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 diesel oil.

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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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/08
Inventor 刘宏海张莉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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