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Process for preparing mesoporous Si-Al material and its preparing process

A silicon-alumina material and pore size technology, applied in the field of mesoporous silicon-alumina materials and their preparation, can solve the problems of different hydrolysis rates of alkoxides, expensive metal alkoxides, complicated preparation process, etc., and achieve enhanced accessibility and strong molecules. Cracking ability, simple operation effect

Active Publication Date: 2005-01-19
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But these preparation methods with alkoxide as raw material have bigger shortcoming: (1) the metal alkoxide as raw material is not only expensive, but also flammable, poisonous, difficult to preserve; (2) different types of alkoxide hydrolysis rate are different , leading to complex preparation process of the material and difficult to control

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  • Process for preparing mesoporous Si-Al material and its preparing process
  • Process for preparing mesoporous Si-Al material and its preparing process

Examples

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Embodiment 1

[0031] This example illustrates the preparation of the mesoporous silica-alumina material provided by the present invention.

[0032] Take 100ml concentration as 90gAl 2 o 3 / L Al 2 (SO 4 ) 3 Put the solution in a beaker, add ammonia water drop by drop under stirring conditions until the system pH = 8, and the neutralization and gelling temperature is 55°C; add 50ml of SiO with a content of 60g under stirring conditions 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 The weight ratio of O=1:0.8:15, carry out ion-exchange to silicon-aluminum precipitate at 60 ℃ to remove the sodium ion therein, exchange repeats twice, carry out 0.5 hour each time, wash and filter after each exchange, Then dry at 120° C. for 15 hours, and bake at 600° C. for 3 hours to obtain the mesoporous silica-alumina material provided by the present invention. Abbreviated as SA-1.

[0033] This sample has figure 1 The X-...

Embodiment 2

[0035] This example illustrates the preparation of the mesoporous silica-alumina material provided by the present invention.

[0036] Take 100ml concentration as 90gAl 2 o 3 / L Al 2 (SO 4 ) 3 Put the solution in a beaker, add ammonia water drop by drop under stirring conditions until the system pH = 8, and the neutralization and gelling temperature is 55°C; add 100ml of SiO with a content of 60g under stirring conditions 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 The weight ratio of O=1:0.8:15, carry out ion-exchange to silicon-aluminum precipitate at 60 ℃ to remove the sodium ion therein, exchange repeats twice, carry out 0.5 hour each time, wash and filter after each exchange, Then dry at 120° C. for 15 hours, and bake at 600° C. for 3 hours to obtain the mesoporous silica-alumina material provided by the present invention. Abbreviated as SA-2.

[0037] This sample has figure 1 The X...

Embodiment 3

[0039] This example illustrates the preparation of the mesoporous silica-alumina material provided by the present invention.

[0040] Add a small amount of water to the beaker in advance to make the concentration 90gAl 2 o 3 / L Al 2 (SO 4 ) 3 The solution and ammonia water (10%) co-flow into a gel in a beaker, and the gelation temperature is 55°C, Al 2 (SO 4 ) 3 The flow rate of the solution is 20ml / min, and the gelation time is 5 minutes. Adjust the flow rate of ammonia water to keep the pH=7.5; after the gelation is completed, add 50ml of SiO with a content of 60g under stirring conditions. 2 / L of water glass, heated to 80°C for aging for 4 hours; use (NH 4 ) 2 CO 3 Solution according to precipitate (dry basis): ammonium salt: H 2 The weight ratio of O=1:0.8:15, carry out ion-exchange to silicon-aluminum precipitate at 60 ℃ to remove the sodium ion therein, exchange repeats twice, carry out 0.5 hour each time, wash and filter after each exchange, Then dry at 120°...

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Abstract

A meso-porous silicon aluminum material with thin diaspore-like phase structure is disclosed. The preparing process includes the following steps: aluminum materials and alkali solution are neutralized to glue, and then silicon materials are added, finally the product is given by aging, ion exchange, drying and baking. The meso-porous silicon aluminum materials possess good hydrothermal stability and can be used as catalyst carrier with strong macromolecule cracking capacity, higher raw oil conversion efficiency and lower heavy oil yield.

Description

technical field [0001] The invention relates to a silicon-aluminum material with concentrated mesopore distribution and a preparation method thereof, and more particularly to a high-activity mesoporous silicon-alumina material for catalytic cracking catalysts and a preparation method thereof. technical background [0002] Catalytic cracking and hydrocracking are the main processes for converting heavy distillates, such as vacuum distillates or residues of heavier components, into smaller molecular fractions. Catalytic materials with high cracking activity are often used in these processes. Microporous (average pore size less than 2 nm) zeolite catalytic materials are widely used in petroleum processing industry due to their shape-selective catalytic performance and high reactivity. However, with the increasing depletion of petroleum resources, more and more attention is paid to the deep processing of heavy oil and residual oil in petroleum processing. Traditional microporou...

Claims

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Application Information

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IPC IPC(8): B01J29/06
Inventor 欧阳颖郑金玉田素贤罗一斌宗保宁舒兴田曾双亲李大东
Owner CHINA PETROLEUM & CHEM CORP
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