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Silicon-aluminum material, preparation thereof and low-green-coke high-activity heavy oil conversion catalytic cracking catalyst

A silicon-aluminum material and catalytic cracking technology, which is applied in catalytic cracking, physical/chemical process catalysts, molecular sieve catalysts, etc., can solve the problem of high coke formation of catalytic cracking catalysts, and achieve low coke selectivity, high conversion activity and coke selectivity low effect

Pending Publication Date: 2021-12-24
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The first technical problem to be solved by the present invention is to provide a new type of silicon-aluminum material for the problem of high coke formation of mesoporous silicon-alumina materials used in catalytic cracking catalysts containing in-situ crystallized Y-type molecular sieves in the prior art. The second technical problem to be solved by the invention is to provide the preparation method of the silicon-aluminum material

Method used

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  • Silicon-aluminum material, preparation thereof and low-green-coke high-activity heavy oil conversion catalytic cracking catalyst
  • Silicon-aluminum material, preparation thereof and low-green-coke high-activity heavy oil conversion catalytic cracking catalyst
  • Silicon-aluminum material, preparation thereof and low-green-coke high-activity heavy oil conversion catalytic cracking catalyst

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preparation example Construction

[0033] In the preparation method of the silicon-aluminum material of the present invention, the acidic aluminum source is selected from the group consisting of aluminum sulfate, aluminum chloride, aluminum sol, and the acidic hydrolyzate of the metal alkoxide of aluminum, that is, the hydrolysis product of the metal alkoxide under acidic conditions. product, the metal alkoxide is, for example, aluminum alkoxide, and the aluminum alkoxide is, for example, one or more of aluminum isopropoxide, aluminum sec-butoxide, aluminum triethoxide, and the like.

[0034] In the preparation method of the silicon-aluminum material described in the present invention, the alkaline silicon source is selected from alkaline hydrolysis products of alkaline silica sol, water glass, sodium silicate, and silicon esters, that is, silicon esters are hydrolyzed under alkaline conditions. The product, the silicon ester is, for example, one or more of methyl orthosilicate, tetraethyl orthosilicate, isoprop...

Embodiment approach

[0052] One embodiment, the NSY molecular sieve synthesized by in-situ crystallization of kaolin has a unit cell constant a 0 The measured silicon to aluminum ratio is 5.2-5.5.

[0053] The NSY molecular sieve synthesized by in-situ crystallization of kaolin described in the present invention is a Y-type molecular sieve composite material, and a preparation method thereof comprises the following steps: (1) transforming kaolin into metakaolin by roasting and dehydrating at 500-900°C, pulverizing, Make metakaolin powder with a particle size of less than 10 microns; (2) add sodium silicate, guiding agent, sodium hydroxide solution and water to metakaolin powder to make a molar ratio of (1-2.5) Na 2 O: Al 2 o 3 : (4-9) SiO 2 : (40-100)H 2The reaction raw material A of O, wherein the mass ratio of directing agent to metakaolin is 0.01-1.0; (3) The reaction raw material A is crystallized under stirring at 88-98°C, and the second silicon is added after the crystallization time rea...

preparation Embodiment 1

[0079] At room temperature (25°C), under stirring, according to SiO 2 :Al 2 o 3 The weight ratio of =75:25 will water glass solution (SiO 2 Concentration 250g / L) is added dropwise to aluminum sulfate solution (aluminum sulfate solution uses Al 2 o 3The concentration is 90g / L); after adding, add sodium hydroxide solution (concentration: 300g / L) until the pH value of the slurry is 10, and then age at 50°C for 6 hours. The obtained solid precipitate was dried at 120° C. for 6 hours, then washed with ammonium chloride solution (concentration: 50 g / L), and filtered to obtain a silica-alumina material B1 with a sodium content of less than 1%. Its elemental analysis chemical weight composition is 0.2Na 2 O·25Al 2 o 3 74.8 SiO2 2 ; Specific surface area 324m 2 / g, pore volume 1.26cm 3 / g, the pore diameter is larger than 10nm, accounting for 82%, the average size of pseudoboehmite crystal grains in the material is 2.2nm, and the possible pore diameter is 33.2nm.

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Abstract

The invention belongs to the technical field of catalytic materials, and relates to a silicon-aluminum material, preparation thereof and a low-green-coke high-activity heavy oil conversion catalytic cracking catalyst. The anhydrous weight chemical expression of the silicon-aluminum material is (0-1) Na2O. (15-50) Al2O3. (85-50) SiO2, the most probable pore size is 10-100 nm, the specific surface area is 150-600 m < 2 > / g, the pore volume is 0.5-1.5 ml / g, and the pore volume of pores with the pore diameter of more than 10nm accounts for 70-98% of the total pore volume. The preparation method comprises the steps of adding an alkaline silicon source into an acidic aluminum source, contacting with alkali, and washing. The low-green-coke high-activity heavy oil conversion catalytic cracking catalyst contains the silicon-aluminum material and an in-situ crystallization Y-type molecular sieve. The catalytic cracking catalyst has good coke selectivity.

Description

technical field [0001] The invention belongs to the technical field of catalytic materials, and relates to a catalytic material, a preparation method and an application method thereof, a low-coke catalytic cracking catalyst and a preparation method thereof Background technique [0002] Catalytic cracking (FCC) is an important secondary processing process of crude oil and occupies a pivotal position in the oil refining industry. In the catalytic cracking process, heavy fractions such as vacuum distillate oil or residues of heavier components react in the presence of catalysts and are converted into high value-added products such as liquefied gas, gasoline, and diesel oil. In this process, it is usually necessary to use Catalytic material with high cracking activity. Y-type zeolite is widely used in catalytic cracking reactions due to its excellent shape-selective catalytic performance and high cracking reaction activity. Y-type zeolite is obtained through two techniques: on...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/26C01F7/02B82Y30/00B82Y40/00C01B39/24C10G11/05B01J29/08B01J29/80
CPCC01B33/26C01F7/02B82Y30/00B82Y40/00C01B39/24C10G11/05B01J29/088B01J29/80C10G2300/1037C10G2400/02B01J29/7007B01J2229/183C01P2006/12C01P2006/14C01P2006/16C01P2004/64
Inventor 杨雪陈辉王振波孙敏周继红罗一斌黄志青
Owner CHINA PETROLEUM & CHEM CORP
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