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Preparation method of heavy oil catalytic cracking catalyst

A cracking catalyst, heavy oil catalysis technology, applied in catalyst activation/preparation, catalytic cracking, physical/chemical process catalyst, etc., can solve the problems of small increase in silicon-aluminum ratio and low utilization rate of silicon source.

Active Publication Date: 2019-12-03
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the silicon source used in this method, such as white carbon black, is relatively expensive, and the utilization rate of the silicon source is low, and the silicon-aluminum ratio of the product is not greatly improved.

Method used

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  • Preparation method of heavy oil catalytic cracking catalyst
  • Preparation method of heavy oil catalytic cracking catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] The directing agent is prepared by mixing 308g of water glass and 189g of peralkali sodium metaaluminate, and standing at 35°C for 15h. 3000g of kaolin (dry basis), 210g of silica sol and deionized water were mixed and beaten, the solid content of the slurry was 40%, and spray-dried to make microspheres. A part of the kaolin microspheres was roasted at 940° C. for 2.4 hours to obtain high clay balls, and the other part was roasted at 800° C. for 2.5 hours to obtain partial clay balls. Mix 400 g of partial clay balls with 730 g of hydrochloric acid solution with a concentration of 20% by weight and mix evenly , stirred at 92°C for 2 hours; mixed 400g of high soil balls and 920g of lye evenly, stirred at 90°C for 2.5 hours, then added 280g of directing agent and 140g of lye in turn, and crystallized at 92°C for 4 hours, then added the treated partial soil The sphere solution continued to crystallize for 20 hours, filtered, washed with water, and dried to obtain NaY molecu...

Embodiment 2

[0046] The directing agent is prepared by mixing 312g of water glass and 208g of peralkali sodium metaaluminate, and standing at 33°C for 20h. 3421g of kaolin (dry basis), 250g of water glass and deionized water were mixed and beaten, and the solid content of the slurry was 35%, and spray-dried to make microspheres. A part of the kaolin microspheres was roasted at 990°C for 1.2h to obtain kaolin balls, and the other part was roasted at 720°C for 2.8h to obtain partial earth balls, and 600g of partial earth balls and 1370g of hydrochloric acid solution with a concentration of 20% by weight were mixed evenly , stirred at 90°C for 5.8 hours; mixed 200g of high soil balls and 370g of lye evenly, stirred at 95°C for 1.1 hour, then added 160g of directing agent and 70g of lye in turn, crystallized at 94°C for 3 hours, then added the treated partial soil The sphere solution continued to crystallize for 22 hours, filtered, washed with water, and dried to obtain NaY molecular sieve mic...

Embodiment 3

[0048] The directing agent is prepared by mixing 306g of water glass and 196g of peralkali sodium metaaluminate, and standing at 34°C for 32h. 2928g of kaolin (dry basis), 270g of water glass and deionized water were mixed and beaten, and the solid content of the slurry was 43%, and spray-dried to make microspheres. A part of the kaolin microspheres was roasted at 960°C for 2.5h to obtain high clay balls, and the other part was roasted at 780°C for 2.2h to obtain partial earth balls, and 100g of partial earth balls and 290g of sulfuric acid solution with a concentration of 18% by weight were mixed evenly , stirred at 95°C for 1 hour; mixed 700g of high soil balls and 1470g of lye evenly, stirred at 91°C for 2 hours, then added 270g of directing agent and 70g of lye in turn, and crystallized at 92°C for 5.5 hours, then added the treated partial soil The sphere solution continued to crystallize for 19 hours, filtered, washed with water, and dried to obtain NaY molecular sieve mi...

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Abstract

The invention provides a preparation method of a heavy oil catalytic cracking catalyst. A synthesis method comprises the specific steps that kaolin is beaten, and subjected to spray drying to form microspheres, then high-temperature roasting and low-temperature roasting are conducted respectively to obtain roasted kaolin spheres and metakaolin spheres, the roasted kaolin spheres are subjected to alkali treatment and then mixed with a guiding agent and alkali liquor, after hydrothermal crystallization is conducted for a period of time, the metakaolin spheres subjected to acid treatment are added for continuing crystallization, and filtering, washing with water and drying are conducted to obtain NaY molecular sieve microspheres. According to the preparation method, under the situation that the molecular sieve crystallinity degree is not decreased, the utilizing rate of a silicon source is increased without additionally adding the silicon source, the silica-alumina ratio of a molecular sieve is greater than 5.5, a composite material has a good hole structure, and the catalytic cracking catalyst prepared through modification has the good heavy oil conversion capacity.

Description

technical field [0001] The invention relates to a heavy oil catalytic cracking catalyst and a preparation method thereof. More specifically, the invention relates to a heavy oil catalytic cracking catalyst prepared by using kaolin as a raw material and adopting in-situ crystallization technology. Background technique [0002] The trend of heavy crude oil in the world has made refineries increasingly desire to convert heavy residual oil into light, high-priced products. Fluid catalytic cracking (FCC) is currently one of the most effective and economical methods for upgrading heavy feedstock. The proportion of FCC feedstock mixed with residual oil is increasing. By increasing the conversion rate of heavy oil, the yield of the target product is increased. It is of great significance to improve the economic benefit of the refinery. [0003] Catalyst is the key technology for heavy oil catalytic cracking reaction. The preparation techniques of catalytic cracking catalysts inclu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/08B01J37/30B01J35/10C10G11/05
CPCB01J29/088B01J37/30C10G11/05B01J2229/183B01J35/633B01J35/615
Inventor 胡清勋赵红娟熊晓云张忠东王久江张莉赵晓争田爱珍曹庚振刘宏海
Owner PETROCHINA CO LTD
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