Catalytic cracking catalyst and preparation method therefor

A catalytic cracking and catalyst technology, applied in catalytic cracking, physical/chemical process catalysts, molecular sieve catalysts, etc., to achieve the effects of good metal pollution resistance, high liquid yield, and increased yield

Active Publication Date: 2014-05-07
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a catalyst for catalytic cracking and its preparation method. The catalyst has good metal pollution resistance, high conversion rate of heavy oil and high liquid recovery in the case of metal pollution.

Method used

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preparation example Construction

[0026] In the preparation method of the catalytic cracking catalyst provided by the present invention, the binder is preferably pseudo-boehmite and alumina sol, and the silica-alumina material with dual-pore distribution is added before the alumina sol and molecular sieve. When the phosphorus modifier and / or the rare earth modifier are included in the catalyst, the phosphorus modifier and the rare earth modifier are introduced into the silicon-aluminum material containing double pores distribution, molecular sieves before spray drying and forming , clay and binder slurry.

[0027] A preferred preparation method is to mix and beat the double-pore distribution silicon-alumina material, pseudoboehmite, kaolin and water, add hydrochloric acid to acidify, and then add aluminum sol and Y-type molecular sieve to prepare slurry. In the case of rare earth modifiers, phosphorus modifiers and rare earth modifiers can be added before the active components or after the active components. ...

preparation Embodiment 1

[0032] Ethyl orthosilicate (Sinopharm Chemical Reagent Co., Ltd., SiO 2 The mass content is 28.0%) as the silicon source, aluminum nitrate as the aluminum source, and the mixture of starch and sodium dodecyl sulfate (SDS) as the template to prepare the dual-pore distribution silicon-alumina material.

[0033] At room temperature, 8.59g tetraethyl orthosilicate (Sinopharm Chemical Reagent Co., Ltd., SiO 2 Mass content 28.0%), 0.23g aluminum nitrate (Al(NO 3 ) 3 , Shanghai Zhenxin Reagent Factory, mass content 99.0%), 1.71g soluble starch (Sinopharm Chemical Reagent Co., Ltd., analytical grade) and 1.68g SDS (Sinopharm Chemical Reagent Co., Ltd., mass content 86.0%) were added to 36ml of water, Stir for 2 hours, adjust the pH value to 6.0 with a concentration of 10% by weight hydrochloric acid solution, stir for 6 hours, stop stirring, age at 100°C for 24 hours, filter the resulting mixture, wash with deionized water, and then dry at 100°C for 10 Hours, 550 ° C roasting for 9...

preparation Embodiment 2

[0035] Sodium silicate was used as the silicon source, aluminum isopropoxide was used as the aluminum source, and a mixture of sucrose and cetyltrimethylammonium bromide (CTAB) was used as the template to prepare a dual-pore distribution silica-alumina material.

[0036] 11.78g sodium silicate (Na 2 SiO 3 9H 2 O, Sinopharm Chemical Reagent Co., Ltd., Na 2 O mass content 19.3-22.8%), 0.62g aluminum isopropoxide (Sinopharm Chemical Reagent Co., Ltd., Al mass content 24.7%), 1.98g sucrose (Sinopharm Chemical Reagent Co., Ltd., analytically pure) and 1.10g CTAB (Sinopharm Group Chemical Reagent Co., Ltd., mass content 99.0%) was added to 36ml of water, stirred for 2 hours, adjusted to a pH value of 10.0 with a 10% by weight aqueous sodium hydroxide solution, stirred for another 6 hours, stopped stirring, and aged at 80°C 48 hours; the resulting mixture was filtered and washed, then dried at 100°C, and calcined at 600°C for 6 hours to obtain a dual-pore distribution silicon-alum...

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Abstract

Provided are a catalytic cracking catalyst and a preparation method therefor. The catalyst contains a double-pore distributed silicon aluminum material and a molecular sieve. The probable pore diameters of the pores with smaller pore diameters of the silicon aluminum material are 2-10nm, and the probable pore diameters of the pores with larger pore diameters are10-25nm. With the total amount of the catalysts as a reference, by weight, the content of the double-pore distributed silicon aluminum material is 1-52%, the content of clay is 9-60%, the content of phosphorus is 0-8% in terms of P2O5, the content of rare earth metal is 0-3% in terms of Re2O3, the content of binding agents is 19-70%, the content of the molecular sieve is 20-70%, and the molecular sieve is a Y-type zeolite. The catalyst has high anti-metal-pollution ability, high heavy oil cracking ability and high liquid yield and can raise quality of gasoline in cracked products greatly.

Description

technical field [0001] The invention relates to a hydrocarbon catalytic cracking catalyst and a preparation method thereof. Background technique [0002] As crude oil gradually becomes heavier and inferior, in order to expand the source of catalytic cracking raw materials and increase the yield of light oil per unit of crude oil, more and more residual oil is mixed into catalytic cracking raw materials. After a large amount of residual oil is blended, the catalytic cracking unit will have problems such as high coke formation rate, low light oil yield, and metal pollution in the catalyst. This requires the cracking catalyst and catalytic cracking process to have strong metal pollution resistance and strong cracking capacity, so as to achieve the purpose of producing more light oil and liquefied gas. [0003] Traditional heavy oil conversion usually uses Y-type molecular sieve catalysts, but microporous molecular sieve catalytic materials show obvious diffusion-limiting effec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/08B01J35/10C10G11/05
Inventor 杨哲许本静田辉平朱玉霞孙敏刘俊
Owner CHINA PETROLEUM & CHEM CORP
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