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A kind of acidic silicon-aluminum catalytic material

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

Active Publication Date: 2016-08-03
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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  • A kind of acidic silicon-aluminum catalytic material
  • A kind of acidic silicon-aluminum catalytic material
  • A kind of acidic silicon-aluminum catalytic material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] This example illustrates the preparation of the acidic silicon-aluminum catalytic material provided by the present invention.

[0020] The preparation process of this embodiment is the same as that described in CN1565733A. Set the concentration to 90gAl 2 O 3 / L of Al 2 (SO 4 ) 3 Solution and concentration is 102gAl 2 O 3 / L, NaAlO with a caustic ratio of 2.5 2 The solution is co-flowed into the continuous gel-forming kettle, keeping the gel-forming pH=10, collecting quantitative gel-forming slurry, and adding 60g SiO under stirring conditions 2 / L water glass, warm to 80℃ for 2 hours; use NH 4 Cl solution according to sediment (dry basis): ammonium salt: H 2 The weight ratio of O=1:0.8:15, the silicon-aluminum precipitate was ion-exchanged at 60°C to remove sodium ions. The exchange was repeated twice for 0.5 hours each time, and then the resulting filter cake was re-pulped and pressed according to fluorosilicone. Acid: Material dry basis: H 2 The weight ratio of O=0.04:1:...

Embodiment 2

[0026] This example illustrates the preparation of the acidic silicon-aluminum catalytic material provided by the present invention.

[0027] The preparation process is the same as in Example 1, wherein the adding ratio of fluorosilicic acid is fluorosilicic acid: dry basis of material: H 2 O=0.08:1:8, the acidic silicon-aluminum catalytic material is obtained after washing and drying. Denoted as BSA-2.

[0028] The X-ray diffraction spectrum of BSA-2 is shown in figure 1 Medium; 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 silicon-aluminum catalytic material provided by the present invention.

[0031] The preparation process is the same as in Example 1, wherein the adding ratio of fluorosilicic acid is fluorosilicic acid: dry basis of material: H 2 O=0.12:1:8, after washing and drying, the acidic silicon-aluminum catalyst material is obtained. Denoted as BSA-3.

[0032] The X-ray diffraction spectrum of BSA-3 is shown in figure 1 Medium; 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.

[0033] It can be seen from the table that the acidic silicon-aluminum catalytic material provided by the present invention has significantly improved crystallinity compared with the comparative material DB-1, and the ratio of B acid to L acid is more than doubled.

[0034] Table 1

[0035] sample name

Crystallinity / %

Na 2 O / %

...

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Abstract

The invention provides an acidic 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.(44-46)SiO2.(54-56)Al2O3, the specific surface area is 200-400m<2> / g, the pore volume is 0.5-1.0ml / 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 0.130-0.150. 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 present invention relates to an acidic silicon-aluminum catalytic material, and further 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. They are widely used in the petroleum processing industry and occupy a pivotal position in oil refineries. In catalytic cracking and hydrocracking processes, heavy distillates such as vacuum distillate or heavier residual oil are reacted in the presence of a catalyst and converted into gasoline, distillate and other liquid cracked products as well as lighter four carbons The following gaseous cracking products usually require the use of catalytic materials with high acidity and high cracking activity in these reaction processes. [0003] Microporous molecular sieve materials are widely used in petroleum refining ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/04B01J35/10C10G11/05C10G47/04
Inventor 郑金玉罗一斌舒兴田闫荣国
Owner CHINA PETROLEUM & CHEM CORP
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