Silicon-aluminium catalytic material with pseudo-boehmite crystal structure

A catalytic material, pseudo-boehmite technology, used in catalytic cracking, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc. The problem of uneven distribution of silicon and aluminum, etc., can achieve the effect of good light oil micro-reactivity, obvious pore characteristics, and concentrated pore distribution.

Active Publication Date: 2013-03-06
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

US4,003,825 discloses a method for preparing silicon-aluminum materials by hydrolysis of organosilicon compounds in an aqueous solution of aluminum nitrate, but organosilicon is expensive and has certain stability problems
US5,045,519 discloses a method for preparing a silicon-aluminum material by mixing and hydrolyzing alkoxy aluminum and orthosilicic acid in an aqueous medium. The material obtained by this method has a pseudo-boehmite structure, low impurity content, and thermal stability Well, more acidic, but less even distribution between silicon and aluminum

Method used

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  • Silicon-aluminium catalytic material with pseudo-boehmite crystal structure
  • Silicon-aluminium catalytic material with pseudo-boehmite crystal structure
  • Silicon-aluminium catalytic material with pseudo-boehmite crystal structure

Examples

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Embodiment 1

[0019] This example illustrates the preparation of the acidic silica-alumina catalytic material provided by the invention.

[0020] The preparation process of this embodiment is the same as that described in CN1565733A. Take an appropriate concentration of 90gAl 2 o 3 / L Al 2 (SO 4 ) 3The solution is placed in a beaker, and ammonia water is added dropwise under stirring conditions until the system pH = 8, and the neutralization and gelling temperature is 55°C; under stirring conditions, add a quantitative concentration of 60gSiO 2 / L of water glass, heated to 80°C for 2 hours; use NH 4 Cl solution according to precipitate (dry basis): ammonium salt: H 2 O = 1: 0.8: 10 weight ratio, at 60 ° C, carry out ion exchange on the silica-alumina precipitate to remove sodium ions, repeat the exchange twice, each time for 0.5 hours, and then re-beat the obtained filter cake and press fluoro-silicon Acid: Material dry basis: H 2 The weight ratio of O=0.02:1:10, the required fluosi...

Embodiment 2

[0026] This example illustrates the preparation of the acidic silica-alumina catalytic material provided by the invention.

[0027] The preparation process is the same as in Example 1, wherein the addition ratio of fluosilicic acid is fluosilicic acid: material dry basis: H 2 O=0.05:1:10, the acidic silica-alumina catalyst material can be obtained after washing and drying. Recorded as BSA-2.

[0028] The X-ray diffraction spectrum of BSA-2 is shown in figure 1 Middle; crystallinity and elemental analysis chemical composition are listed in Table 1; pore parameters such as specific surface area and infrared acidity data are listed in Table 2.

Embodiment 3

[0030] This example illustrates the preparation of the acidic silica-alumina catalytic material provided by the invention.

[0031] The preparation process is the same as in Example 1, wherein the addition ratio of fluosilicic acid is fluosilicic acid: material dry basis: H 2 O=0.08:1:10, the acidic silica-alumina catalyst material can be obtained after washing and drying. Recorded as BSA-3.

[0032] The X-ray diffraction spectrum of BSA-3 is shown in figure 1 Middle; crystallinity and elemental analysis chemical composition are listed in Table 1; pore parameters such as specific surface area and infrared acidity data are listed in Table 2.

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Abstract

The invention provides a silicon-aluminium catalytic material with a pseudo-boehmite crystal structure. By oxide weight, the anhydrous chemical formula of the catalytic material is (0-0.2)Na2O.(30-33)SiO2.(67-70)Al2O3, the specific surface area is 300-500m<2>/g, the pore volume is 0.5-1.5ml/g, and the mean pore size is 8-15nm. The catalytic material is characterized in that the ratio of pyridine infrared B acid to L acid, measured at 200 DEG C, in the catalytic material is 0.085-0.100. The silicon-aluminium catalytic material has the beneficial effects that the mesopore characteristic of the acidic silicon-aluminium catalytic material is obvious, the pores are distributed in a concentrated manner, meanwhile, the silicon-aluminium catalytic material contains B acid and L acid centers, the ratio of B acid to L acid is obviously increased and the material has better light oil micro-activity. Besides, the acidic silicon-aluminium catalytic material provided by the invention has higher degree of crystallinity.

Description

technical field [0001] The invention relates to a silicon-alumina catalytic material with a pseudo-boehmite crystal phase structure, and more specifically, an acidic material with a high B-acid ratio, high activity and obvious mesopore characteristics. Background technique [0002] Catalytic cracking and hydrocracking are two very important processes in the petroleum refining process, which are widely used in the petroleum processing industry and occupy a pivotal position in the refinery. In catalytic cracking and hydrocracking processes, heavy fractions such as vacuum distillates or residues of heavier components are reacted in the presence of catalysts to convert them into gasoline, distillates and other liquid cracking products as well as lighter four-carbon The following gaseous cracking products usually require the use of catalytic materials with high acidity and high cracking activity during these reactions. [0003] Microporous molecular sieve materials are widely us...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/04B01J35/10C10G11/05
Inventor 郑金玉罗一斌舒兴田闫荣国
Owner CHINA PETROLEUM & CHEM CORP
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