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Preparation method of rare earth type hierarchical pore material

A multi-level porous, rare earth technology, applied in chemical instruments and methods, catalytic cracking, molecular sieve catalysts, etc., can solve the problems of large steric hindrance, high price, and easy structure collapse.

Pending Publication Date: 2020-10-09
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the disadvantage of this molecular sieve is that it needs to use an expensive template agent, and the pore size is only about 2.7nm. It still has a large steric hindrance effect on the cracking reaction of macromolecules. The structure is easy to collapse under high temperature hydrothermal conditions, and the cracking activity is low Difference

Method used

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  • Preparation method of rare earth type hierarchical pore material
  • Preparation method of rare earth type hierarchical pore material
  • Preparation method of rare earth type hierarchical pore material

Examples

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preparation example Construction

[0040] The preparation process of the directing agent adopted in the embodiment is: 5700g water glass (Changling Catalyst Company provides, SiO 2 261g / L, modulus 3.31, density 1259g / L) is put into the beaker, add 4451g perbasic sodium metaaluminate (provided by Changling Catalyst Company, Al 2 o 3 39.9g / L, Na 2 O 279.4g / L, density 1326g / L) and aged at 30°C for 18 hours, a molar ratio of 16.1Na 2 O: Al 2 o 3 :15SiO2 2 :318.5H 2 O's directing agent.

[0041] Examples 1-8 illustrate the preparation of said silicon-aluminum material 1 and the process of obtaining rare earth type hierarchical porous materials on this basis.

Embodiment 1

[0043] With 7.5SiO 2 :Al 2 o 3 : 2.15Na 2 O: 190H 2 O gel feeding molar ratio to synthesize NaY molecular sieve. Water glass, aluminum sulfate, sodium metaaluminate, directing agent and deionized water were mixed according to the above ratio and vigorously stirred for 1 hour, wherein the addition ratio of directing agent was 5% by weight, and the mixed gel was Crystallize at 100°C for 25 hours, filter, wash and dry to obtain NaY molecular sieve dry powder.

[0044] The NaY molecular sieve dry powder obtained above was mixed with an appropriate amount of deionized water for beating, and the AlCl 3 Solution (concentration 60gAl 2 o 3 / L) and NaOH solution (concentration 1M) were added to carry out neutralization reaction, the pH value of the slurry system was maintained at 9.4 by adjusting the flow rate of the two materials, and after the neutralization reaction, the aging treatment was continued at 60°C for 2 hours. After filtering, washing and drying, the silicon-alumi...

Embodiment 2

[0049] With 8.5SiO 2 :Al 2 o 3 : 2.65Na 2 O: 210H 2 O gel feeding molar ratio to synthesize NaY molecular sieve. Water glass, aluminum sulfate, sodium metaaluminate, directing agent and deionized water were mixed according to the above ratio and vigorously stirred for 1 hour, wherein the addition ratio of directing agent was 5% by weight, and the mixed gel was Crystallize at 100°C for 26 hours, filter, wash and dry to obtain NaY molecular sieve dry powder.

[0050] The NaY molecular sieve dry powder obtained above was mixed with an appropriate amount of deionized water for beating, and the Al 2 (SO 4 ) 3 Solution (concentration 50gAl 2 o 3 / L) and NaAlO 2 Solution (concentration 182gAl 2 o 3 / L) was added to it for neutralization reaction, the pH value of the slurry system was maintained at 9.0 by adjusting the flow rate of the two materials, after the neutralization reaction, the aging treatment was continued at 70°C for 5 hours, filtered, washed and dried to obta...

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Abstract

The invention discloses a preparation method of a rare earth type hierarchical pore material. The method is characterized in that two-exchange two-baking operation is combined with rare earth deposition for modifying a silicon-aluminum material with rare earth; the silicon-aluminum material has an FAU crystalline phase structure and a pseudo-boehmite structure, and has probable pore distribution with two characteristics of 3-4 nm and 7-10 nm or has particle size parameters that D (V, 0.5) is 1.8-2.5 and D (V, 0.9) is 4.0-8.0. The material prepared by the method provided by the invention has micropore and mesoporous structures at the same time, and the modification treatment with rare earth effectively promotes the improvement of reaction performance.

Description

technical field [0001] The invention relates to a preparation method of a hierarchical porous material, in particular the invention relates to a preparation method of a rare earth type hierarchical porous material. 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 product. The catalytic cracking reaction process follows the carbon ion reaction mechanism, so it is necessary to use acidic catalytic materials, especially catalytic materials with strong B acid centers. Amorphous silica-alumina material is an acidic catalytic material, which has bo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/08B01J35/10C10G11/05
CPCB01J29/088C10G11/05B01J35/617B01J35/633B01J35/615
Inventor 郑金玉王成强罗一斌满征
Owner CHINA PETROLEUM & CHEM CORP