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Method for preparing catalytic cracking catalyst containing pseudo-boehmite

A pseudo-boehmite and catalytic cracking technology, which is applied in the field of preparation of high-heavy oil conversion catalytic cracking catalysts, can solve the problems of catalyst slurry solid content decrease, viscosity increase, and impact on catalyst output, etc., to achieve superior reaction performance, increase content, Effect of improving coke selectivity

Active Publication Date: 2016-06-22
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, since the viscosity of pseudo-boehmite is peptized, the viscosity increases significantly. If only increasing the content of pseudo-boehmite to increase the specific surface area of ​​the matrix will lead to a substantial decrease in the solid content of the catalyst slurry, which will affect the catalyst output.

Method used

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  • Method for preparing catalytic cracking catalyst containing pseudo-boehmite
  • Method for preparing catalytic cracking catalyst containing pseudo-boehmite
  • Method for preparing catalytic cracking catalyst containing pseudo-boehmite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Take by weighing 2.769 kilograms of pseudo-boehmite (solid content 65.0%, Shanxi Aluminum Factory product, the same below), add 15.601 kilograms of deionized water, add 547 milliliters of water glass (SiO 2 250g / l, Na 2 (088g / l, produced by Lanzhou Petrochemical Company, the same below), after continuing to stir for 30 minutes, add 2.308 kilograms of pseudo-boehmite, 4.546 kilograms of kaolin (dry basis, industrial products of China Kaolinshi Company, the same below), aluminum sol 3.608 kg (including Al 2 o 3 19.4wt%, produced by Lanzhou Petrochemical Company Catalyst Factory, the same below), rare earth solution 346.3ml (content is 288.75gL -1 , La, Ce mixed rare earth, collected from Lanzhou Petrochemical Catalyst Factory, the same below) and stirred for two hours, then added 700 ml of 37% by weight hydrochloric acid, stirred for 1 hour, and aged at 50 ° C for 2 hours.

[0042] 2.361 kg of REUSY molecular sieves (solid content 84.7%, Na 2 O content 1.1 wt%, RE 2 ...

Embodiment 2

[0046] Weigh 0.769 kg of pseudo-boehmite, add 4.0 kg of deionized water, add 55.73 ml of ethyl orthosilicate under stirring, continue stirring for 30 minutes, add 2.0 kg of pseudo-boehmite, 4.178 kg of kaolin, aluminum sol 6.186 kg, stirred for two hours, then added 500 ml of 37% by weight hydrochloric acid, stirred for 1 hour, and aged at 60°C for 2 hours.

[0047] 4.132 kg of REUSY molecular sieve and 7.138 kg of deionized water were mixed and beaten for 2 hours, then added to the first step of the beating tank after mixing, beating homogenized for 4 hours, and then spray-dried.

[0048] The catalyst obtained by spray drying was calcined at 650°C for 2 hours, then stirred in aqueous hydrochloric acid solution with pH=2.8 for 20 minutes, filtered, and dried at 120°C for 6 hours to obtain the cracking catalyst CAT-2 provided by the present invention.

[0049] The composition of the catalyst CAT-2 is: based on the catalyst mass as 100%, 34.85% by weight of kaolin, 13% by weight o...

Embodiment 3

[0051] Take by weighing 1.538 kilograms of pseudo-boehmite, add 10.0 kilograms of deionized water, add 76 milliliters of water glass under stirring, after continuing to stir for 30 minutes, add 3.077 kilograms of pseudo-boehmite, 3.759 kilograms of kaolin, 4.381 kilograms of aluminum sol, stir After two hours, 400 ml of 37% by weight hydrochloric acid was added, stirred for 1 hour, and aged at room temperature for 2 hours.

[0052] 3.542 kg of REUSY molecular sieves (solid content 84.7%, Na 2 O content 1.1 wt%, RE 2 o 3 Content 4.3wt%, produced by Lanzhou Petrochemical Company Catalyst Factory, the same below) and 4.692 kg of deionized water were mixed and beaten for 2 hours, then added to the first step beating tank after mixing, beating homogenized for 4 hours, and then spray-dried.

[0053] The catalyst obtained by spray drying was calcined at 550°C for 2 hours, then stirred in aqueous hydrochloric acid solution with pH=3.2 for 40 minutes, filtered, and dried at 120°C for...

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Abstract

The invention discloses a method for preparing a catalytic cracking catalyst containing pseudo-boehmite.The method comprises the steps of mixing and stirring part of pseudo-boehmite and silica solution for over 15 min to prepare modified pseudo-boehmite A, the modified pseudo-boehmite A, residual pseudo-boehmite B and clay are mixed and pulped to prepare matrix size containing pseudo-boehmite, the matrix size and molecular sieve size are mixed, homogenized, formed and dried, and ion exchange is conducted to obtain the catalytic cracking catalyst, wherein the dry basis mass ratio of the modified pseudo-boehmite A to the residual pseudo-boehmite B is 0.2-2.5, and the add amount of silica solution is that SiO2 accounts for 0.5-8% of the dry basis weight of the modified pseudo-boehmite A.The catalyst prepared with the method has a high abrasion index, a large pore volume and high heavy oil conversion capacity and coke selectivity.

Description

technical field [0001] The invention relates to a preparation method of a catalytic cracking catalyst, in particular to a preparation method of a high heavy oil conversion catalytic cracking catalyst. Background technique [0002] As crude oil becomes heavier and inferior worldwide, the conversion capacity of heavy oil has become the main factor restricting the product structure and economic benefits of refineries. Due to the large molecular diameter of heavy oil, it is difficult to enter the pores of molecular sieves. It is mainly cracked on the large pores in the catalyst, and this part of the pores is mainly provided by the active matrix. Improving the pore structure of the catalyst matrix and increasing the specific surface area of ​​the matrix is ​​one of the main research directions for catalytic cracking of heavy oil. [0003] Kaolin is the main component of catalytic cracking catalyst, but its pore volume and specific surface area are usually small. Some studies hav...

Claims

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Application Information

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IPC IPC(8): B01J29/16B01J29/08
CPCB01J29/084B01J29/166B01J2229/183
Inventor 高雄厚熊晓云胡清勋王久江赵晓争刘宏海田爱珍赵红娟张莉王宝杰杨周侠
Owner PETROCHINA CO LTD
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