Mesoporous acid silicon-aluminum catalytic material

A catalytic material, acid silicon technology, applied in catalytic cracking, physical/chemical process catalyst, cracking, etc., can solve the problems of high price and stability of organic silicon, low impurity content, uneven distribution of silicon and aluminum, etc. The effect of oil micro-reactivity, obvious pore characteristics, and concentrated pore distribution

Inactive 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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  • Mesoporous acid silicon-aluminum catalytic material
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  • Mesoporous acid silicon-aluminum catalytic material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] This example illustrates the preparation of the mesoporous acidic silica-alumina catalytic material provided by the present invention.

[0030] 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 ) 3 The solution is placed in a beaker, and ammonia water is added dropwise under stirring conditions until the system pH=9, and the neutralization and gelling temperature is 50°C; the metering concentration of 60gSiO 2 / L of water glass, heated to 80°C for 4 hours; use NH 4 Cl solution according to precipitate (dry basis): ammonium salt: H 2 With a weight ratio of O=1:0.5:10, ion-exchange the silica-alumina precipitate at 60°C to remove sodium ions. The exchange is repeated twice for 0.5 hours each time, and then the obtained filter cake is re-beaten and pressed by fluorine-silicon Acid: Material dry basis: H 2 The weight ratio of O=0.03:1:10, the required fluosilicic aci...

Embodiment 2

[0036] This example illustrates the preparation of the mesoporous acidic silica-alumina catalytic material provided by the present invention.

[0037] 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=0.06:1:10, the acidic silica-alumina catalyst material can be obtained after washing and drying. Recorded as BSA-2.

[0038] The X-ray diffraction spectrum of BSA-2 is shown in figure 1 ; 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

[0040] This example illustrates the preparation of the mesoporous acidic silica-alumina catalytic material provided by the present invention.

[0041] 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 0=0.09:1:10, the acidic silica-alumina catalyst material can be obtained after washing and drying. Recorded as BSA-3.

[0042] The X-ray diffraction spectrum of BSA-3 is shown in figure 1 ; 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.

[0043] Table 1

[0044] sample name

Crystallinity / %

Na 2 O / %

al 2 o 3 / %

SiO 2 / %

BSA-1

54.5

0.09

82.3

17.1

BSA-2

56.0

0.11

82.4

17.0

BSA-3

57.4

0.10

81.9

17.4

DB-1

50.6

0.11

...

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Abstract

The invention discloses a mesoporous acid silicon-aluminum catalytic material which is of a pseudo boehmite crystalline phase structure. Based on the oxide weight, the anhydrous chemical expression of the material is (0-0.2)Na2O.(16-20)SiO2.(80-84)Al2O3, the specific surface area is 300-600m<2>/g, the pore volume is 1.0-2.0ml/g, the average pore size is 8-20nm, and the ratio of pyridine infrared B acid to L acid measured at 200 DEG C is 0.060-0.085. The material disclosed by the invention has obvious mesoporous characteristics and centralized pore distribution, and contains the centers of B acid and L acid at the same time; and moreover, the ratio of the B acid to the L acid is obviously increased, and the material obtains better light oil micro-activity.

Description

technical field [0001] The invention relates to an acidic silicon-aluminum catalytic material, in particular to an acidic silicon-aluminum catalytic material with 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 used in petroleum ref...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/04C10G11/05C10G47/04
Inventor 郑金玉罗一斌舒兴田闫荣国
Owner CHINA PETROLEUM & CHEM CORP
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