A kind of catalytic cracking catalyst containing nay molecular sieve composite material and preparation method thereof

Abstract

The invention provides a catalytic cracking catalyst containing NaY molecular sieve composite material and a preparation method thereof. The preparation method mainly includes the following steps: roasting kaolin at high temperature and low temperature respectively to obtain high soil and partial soil, and the high soil is subjected to alkali treatment , mixed with directing agent and lye, hydrothermally crystallized for a period of time, adding acid-treated partial soil to continue crystallization, filtered, washed, and dried to obtain NaY molecular sieve composite material. The method does not reduce the crystallinity of the molecular sieve without adding an external silicon source, the silicon-aluminum ratio is greater than 5.5, and the medium and large pore volume of the composite material accounts for more than 35% of the total pore volume. After the NaY molecular sieve composite material is modified, it is mixed with clay, other molecular sieves and binders for beating, spray drying and washing. The prepared catalyst has high gasoline yield, low coke yield and strong heavy oil cracking ability.

Description

technical field

[0001] The present invention relates to a catalytic cracking catalyst containing NaY molecular sieve composite material and its preparation method, more specifically, the present invention relates to a catalytic cracking catalyst containing NaY molecular sieve and kaolin composite material and its preparation method, the catalyst is mainly used It is used as the catalytic cracking reaction process of heavy oil. 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] Catal...

Examples

Embodiment 1

[0041] The directing agent is prepared by mixing 1.54kg of water glass and 0.945kg of peralkaline sodium metaaluminate and standing at 35°C for 15h. A part of kaolin was roasted at 940°C for 2.4 hours to obtain high soil, and the other part was roasted at 800°C for 2.8 hours to obtain partial soil. Mix 2 kg of partial soil with 3.65 kg of hydrochloric acid solution with a concentration of 20% by weight and stir at 92°C. 2 hours; mix 2kg of high soil and 4.6kg of lye evenly, stir at 90°C for 2.5 hours, then add 1.4kg of directing agent and 0.7kg of lye in turn, after crystallization at 92°C for 4 hours, add the treated partial earth solution to continue Crystallize for 20 hours, filter, wash with water, and dry to obtain a NaY molecular sieve composite material. The crystallinity of NaY molecular sieve in the composite material was measured by X-ray diffraction method to be 68%, SiO 2 / Al 2 o 3 5.78, specific surface 609m 2 / g, total pore volume 0.44m 3 / g, medium and larg...

Embodiment 2

[0044] The directing agent is prepared by mixing 0.624kg of water glass and 0.416kg of peralkaline sodium metaaluminate, and standing at 33°C for 20h. A part of kaolin was roasted at 970° C. for 1.5 hours to obtain high soil, and the other part was roasted at 830° C. for 2 hours to obtain partial soil. 2.5 kg of partial soil and 4.3 kg of sulfuric acid solution with a concentration of 18% by weight were mixed uniformly and heated at 94° C. Stir for 1 hour; mix 1.5kg of high soil and 4.2kg of lye evenly, stir at 93°C for 1.2 hours, then add 0.8kg of directing agent and 1.0kg of lye in turn, after crystallization at 93°C for 6 hours, add the treated partial soil The solution continued to crystallize for 28 hours, filtered, washed with water, and dried to obtain a NaY molecular sieve composite material. The crystallinity of NaY molecular sieve in the composite material was measured by X-ray diffraction method to be 70%, SiO 2 / Al 2 o 3 5.67, specific surface 623m 2 / g, total ...

Embodiment 3

[0047] The directing agent is prepared by mixing 1.53kg water glass and 0.98kg peralkaline sodium metaaluminate, and standing at 34°C for 32h. A part of kaolin was roasted at 950°C for 2 hours to obtain high soil, and the other part was roasted at 900°C for 1.5 hours to obtain partial soil. Mix 1.0kg of partial soil with 2.65g of nitric acid solution with a concentration of 22% by weight, and heat the mixture at 92.5°C. Stir for 3 hours; mix 3.0kg of high soil and 4.55g of lye evenly, stir at 95°C for 6 hours, then add 1kg of directing agent and 0.85kg of lye in turn, crystallize at 92°C for 5 hours, then add the treated partial earth solution Continue to crystallize for 18 hours, filter, wash with water, and dry to obtain a NaY molecular sieve composite material. The crystallinity of NaY molecular sieve in the composite material was measured by X-ray diffraction method to be 66%, SiO 2 / Al 2 o 3 5.81, specific surface 607m 2 / g, total pore volume 0.46m 3 / g, medium and l...

technical field

[0001] The present invention relates to a catalytic cracking catalyst containing NaY molecular sieve composite material and its preparation method, more specifically, the present invention relates to a catalytic cracking catalyst containing NaY molecular sieve and kaolin composite material and its preparation method, the catalyst is mainly used It is used as the catalytic cracking reaction process of heavy oil. 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] Catal...

Examples

Embodiment 1

[0041] The directing agent is prepared by mixing 1.54kg of water glass and 0.945kg of peralkaline sodium metaaluminate and standing at 35°C for 15h. A part of kaolin was roasted at 940°C for 2.4 hours to obtain high soil, and the other part was roasted at 800°C for 2.8 hours to obtain partial soil. Mix 2 kg of partial soil with 3.65 kg of hydrochloric acid solution with a concentration of 20% by weight and stir at 92°C. 2 hours; mix 2kg of high soil and 4.6kg of lye evenly, stir at 90°C for 2.5 hours, then add 1.4kg of directing agent and 0.7kg of lye in turn, after crystallization at 92°C for 4 hours, add the treated partial earth solution to continue Crystallize for 20 hours, filter, wash with water, and dry to obtain a NaY molecular sieve composite material. The crystallinity of NaY molecular sieve in the composite material was measured by X-ray diffraction method to be 68%, SiO 2 / Al 2 o 3 5.78, specific surface 609m 2 / g, total pore volume 0.44m 3 / g, medium and larg...

Embodiment 2

[0044] The directing agent is prepared by mixing 0.624kg of water glass and 0.416kg of peralkaline sodium metaaluminate, and standing at 33°C for 20h. A part of kaolin was roasted at 970° C. for 1.5 hours to obtain high soil, and the other part was roasted at 830° C. for 2 hours to obtain partial soil. 2.5 kg of partial soil and 4.3 kg of sulfuric acid solution with a concentration of 18% by weight were mixed uniformly and heated at 94° C. Stir for 1 hour; mix 1.5kg of high soil and 4.2kg of lye evenly, stir at 93°C for 1.2 hours, then add 0.8kg of directing agent and 1.0kg of lye in turn, after crystallization at 93°C for 6 hours, add the treated partial soil The solution continued to crystallize for 28 hours, filtered, washed with water, and dried to obtain a NaY molecular sieve composite material. The crystallinity of NaY molecular sieve in the composite material was measured by X-ray diffraction method to be 70%, SiO 2 / Al 2 o 3 5.67, specific surface 623m 2 / g, total ...

Embodiment 3

[0047] The directing agent is prepared by mixing 1.53kg water glass and 0.98kg peralkaline sodium metaaluminate, and standing at 34°C for 32h. A part of kaolin was roasted at 950°C for 2 hours to obtain high soil, and the other part was roasted at 900°C for 1.5 hours to obtain partial soil. Mix 1.0kg of partial soil with 2.65g of nitric acid solution with a concentration of 22% by weight, and heat the mixture at 92.5°C. Stir for 3 hours; mix 3.0kg of high soil and 4.55g of lye evenly, stir at 95°C for 6 hours, then add 1kg of directing agent and 0.85kg of lye in turn, crystallize at 92°C for 5 hours, then add the treated partial earth solution Continue to crystallize for 18 hours, filter, wash with water, and dry to obtain a NaY molecular sieve composite material. The crystallinity of NaY molecular sieve in the composite material was measured by X-ray diffraction method to be 66%, SiO 2 / Al 2 o 3 5.81, specific surface 607m 2 / g, total pore volume 0.46m 3 / g, medium and l...

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