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A kind of active mesoporous silica-alumina catalytic material

A catalytic material, mesoporous silicon-alumina technology, applied in catalytic cracking, physical/chemical process catalysts, heterogeneous catalyst chemical elements, etc., can solve the problem of low impurity content, uneven distribution of silicon and aluminum, expensive and stable organic silicon prices issues of sex

Active Publication Date: 2019-08-16
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 active mesoporous silica-alumina catalytic material
  • A kind of active mesoporous silica-alumina catalytic material

Examples

Experimental program
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Effect test

Embodiment 1

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

[0027] Take Al 2 (SO 4 ) 3 Solution (concentration 90gAl 2 o 3 / L) and ammonia (mass fraction 25%) are reaction raw materials. Using the method of co-flow gelation, under vigorous stirring, the Al 2 (SO 4 ) 3 Solution and ammoniacal liquor are mixed into gel, and the temperature of controlling gelation is 40 ℃, and the pH value of gelation system remains on 9.0, simultaneously the water glass solution of metering (concentration 100gSiO 2 / L) mixed with the above-mentioned colloidal slurry in parallel flow to realize the online addition of silicon source. After collecting a certain amount of mixed slurry, raise the temperature to 70°C and age for 2 hours; Base: Ammonium Salt: H 2 The weight ratio of O=1:0.5:15 was exchanged at 60°C for 0.5 hours, filtered and washed with water, and the ammonium exchange was repeated once. After ...

Embodiment 2

[0034] This example illustrates the preparation of the active mesoporous silica-alumina catalytic material provided by the present invention.

[0035] Take Al 2 (SO 4 ) 3 The solution and ammonia water are used as the reaction raw materials, and the Al 2 (SO 4 ) 3 The solution and ammonia water are mixed to form a gel, the gelation temperature is controlled at 30°C, the pH value of the gelation system is maintained at 10.0, and the metered water glass solution and the above-mentioned gelation slurry are mixed in parallel to realize the on-line silicon source Add, after collecting a certain amount of mixed slurry, raise the temperature to 60°C and age for 2 hours; after filtering, the obtained solid precipitate is calculated on a dry basis of the precipitate: ammonium salt: H 2 The weight ratio of O=1:1:15 was exchanged at 70° C. for 0.5 hours, filtered and washed with water, and the active mesoporous silica-alumina catalytic material provided by the present invention was ...

Embodiment 3

[0042] This example illustrates the preparation of the active mesoporous silica-alumina catalytic material provided by the present invention.

[0043] Take Al 2 (SO 4 ) 3 solution and NaAlO 2 Solution (concentration 190gAl 2 o 3 / L) is the reaction raw material, at room temperature co-flow into gel and control the pH value of the gel-forming process to remain at 10.5, and simultaneously mix the water glass solution and the gel-forming slurry in proportion to realize the on-line addition of silicon source, and then Warm up the collected slurry to 60°C and age for 4 hours; filter the resulting solid precipitate on a dry basis: ammonium salt: H 2 The weight ratio of O=1:0.8:12 was exchanged at 55° C. for 1 hour, filtered and washed with water, and the active mesoporous silica-alumina catalyst material provided by the present invention was obtained, denoted as AM-3.

[0044] AM-3 has a pseudo-boehmite structure, and its X-ray diffraction spectrum is as shown in the accompany...

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Abstract

An active mesoporous silica-alumina catalytic material with a pseudo-boehmite crystal phase structure. Based on the weight of the oxide, its anhydrous chemical expression is: (0~0.2)Na 2 O·(10~60)SiO 2 ·(40~90)Al 2 O 3 , its specific surface area is 200~600m 2 / g, the pore volume is 0.5~2.0ml / g, and the average pore diameter is 8~20nm. It is characterized in that the particle size distribution of the catalytic material is D(V,0.5)≤4μm, D(V,0.9)≤12μm, and its 200 The ratio of pyridine infrared B acid amount to L acid amount measured at ℃ is 0.055~0.085. This material has obvious mesoporous characteristics, smaller particle size, and contains both B acid and L acid centers. The ratio of B acid content to L acid content is high, and the material has higher cracking activity.

Description

technical field [0001] The invention relates to an active mesoporous silicon-aluminum catalytic material, more specifically, a mesoporous silicon-aluminum catalytic material with smaller particle size, higher B-acid ratio, high activity and obvious mesopore characteristics. Background technique [0002] Catalytic cracking is a very important process in the petroleum refining process. It is widely used in the petroleum processing industry and occupies a pivotal position in the refinery. In the catalytic cracking process, heavy fractions such as vacuum distillates or residues of heavier components are reacted in the presence of a catalyst to convert gasoline, distillate and other liquid cracking products and lighter gaseous cracking of up to four carbons products, catalytic materials with high acidity and high cracking activity are usually required to be used in these reaction processes. [0003] Microporous molecular sieve materials are widely used in petroleum refining and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/04B01J35/10C10G11/04
CPCC10G11/04B01J23/002B01J23/04B01J2523/00B01J35/617B01J35/635B01J35/638B01J35/647B01J35/615B01J2523/12B01J2523/31B01J2523/41
Inventor 郑金玉王成强罗一斌
Owner CHINA PETROLEUM & CHEM CORP
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