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y/sm 2 o 3 /sba-3/asa composite material and preparation method thereof

A composite material and composite molecular sieve technology, applied in the field of Y/Sm2O3/SBA-3/ASA composite material and its preparation, can solve the problems of increasing auxiliary equipment, complicated process, and increased cost of synthetic composite molecular sieve, and achieves a skeleton silicon-aluminum ratio High, thermal stability improvement effect

Active Publication Date: 2019-10-11
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that the preparation time is longer
[0013] The preparation methods of micro-mesoporous composite materials mentioned in the above documents or patents are either complicated in process or take a long time in the synthesis process
CN102000604A introduces a microwave treatment process in the process of synthesizing Y / MCM-41 composite molecular sieve, increases auxiliary equipment, and greatly increases the cost of synthesizing composite molecular sieve
In addition, the mesoporous silicon-aluminum materials in the micro-mesoporous composite materials mentioned in the above documents or patents are irregular pores

Method used

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  • y/sm <sub>2</sub> o <sub>3</sub> /sba-3/asa composite material and preparation method thereof
  • y/sm <sub>2</sub> o <sub>3</sub> /sba-3/asa composite material and preparation method thereof
  • y/sm <sub>2</sub> o <sub>3</sub> /sba-3/asa composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Y / Sm 2 o 3 Synthesis of / SBA-3 / ASA Composite

[0053] (1) Preparation of guiding agent: Take 24.7g of sodium hydroxide (Beijing Chemical Plant, analytically pure) and add it to 45.9g of water, stir until the sodium hydroxide is completely dissolved, then add 6.5g of sodium metaaluminate (researched by Shandong Aluminum Industry Co., Ltd. Institute, Industrial Products, Al 2 o 3 content 49.1wt%), stirred until the sodium metaaluminate was completely dissolved to obtain sodium metaaluminate solution A. 70g solution A and 100g water glass (Beijing Red Star Soda Soda Factory, SiO 2 Content 27.81wt%, Na 2 O content 8.74wt%) was poured into 55.5g of deionized water successively, stirred evenly, and aged at 30° C. for 22 hours to obtain the directing agent. The molar ratio of each component of the directing agent is: 16Na 2 O: Al2 o 3 :16SiO2 2 :320H 2 O.

[0054] (2)Sm 2 o 3 / SBA-3 precursor preparation: According to the ratio of samarium nitrate: aluminum isopro...

Embodiment 2

[0059] Unless otherwise specified, the sources of each raw material are the same as in Example 1.

[0060] (1) Preparation of guiding agent: Take 17.5g of sodium hydroxide and add it to 45.9g of water, stir until the sodium hydroxide is completely dissolved, then add 6.5g of sodium metaaluminate, and stir until the sodium metaaluminate is completely dissolved to obtain metaaluminate Sodium solution A. Pour 70g of solution A and 115g of water glass into 75.5g of deionized water in turn, stir evenly, and then statically age at 30°C for 22 hours to obtain the directing agent. The molar ratio of each component of the directing agent is: 12Na 2 O: Al 2 o 3 :18SiO2 2 :340H 2 O.

[0061] (2)Sm 2 o 3 / SBA-3 precursor preparation: According to the ratio of samarium nitrate: aluminum isopropoxide: SBA-3 molecular sieve: aqueous solution is 1g: 2.5g: 5g: 10g, add samarium nitrate, aluminum isopropoxide, SBA-3 molecular sieve in sequence In an aqueous solution of 5wt% ethanol and...

Embodiment 3

[0065] Unless otherwise specified, the sources of each raw material are the same as in Example 1.

[0066] (1) Preparation of guiding agent: Take 24.7g of sodium hydroxide and add it to 45.9g of water, stir until the sodium hydroxide is completely dissolved, then add 6.5g of sodium metaaluminate, and stir until the sodium metaaluminate is completely dissolved to obtain metaaluminate Sodium solution A. Pour 70g of solution A and 100g of water glass into 65.5g of deionized water in sequence, stir evenly, and then statically age at 30°C for 22 hours to obtain the directing agent. The molar ratio of each component of the directing agent is: 16Na 2 O: Al 2 o 3 :16SiO2 2 :330H 2 O.

[0067] (2)Sm 2 o 3 / SBA-3 precursor preparation: According to the ratio of samarium nitrate: aluminum isopropoxide: SBA-3 molecular sieve: aqueous solution is 10g: 2g: 10g: 50g, add 1wt of samarium nitrate, aluminum isopropoxide, and SBA-3 molecular sieve in sequence % ethanol and 5wt% methanes...

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Abstract

The invention provides a method for preparing a Y / Sm2O3 / SBA-3 / ASA composite material containing regular mesopores. The method comprises the following steps: preparing a guiding agent, preparing an Sm2O3 / SBA-3 precursor, and synthesizing a Y / Sm2O3 / SBA-3 composite molecular sieve from the reaction mixture by adopting a hydrothermal crystallization method; adding a surfactant and an alkaline aluminum-source solution into the Y / Sm2O3 / SBA-3 composite molecular sieve slurry, and adjusting the pH value to obtain a solid product; and washing, drying and roasting the product to obtain the Y / Sm2O3 / SBA-3 / ASA composite material of which the surface is coated with ASA. In the composite material, the differential thermal failure temperature of the Y-shaped molecular sieve can be higher than 950 DEG C, and the grain size is kept to be lower than 400nm. The composite material has the porous distribution characteristics of micropore-mesopore, mesopores in the surface ASA are regular mesopores, and the mesoporous size can be adjusted by changing the synthesizing process condition.

Description

technical field [0001] The invention provides a Y / Sm 2 o 3 / SBA-3 / ASA composite material and its preparation method, specifically, a Y-type molecular sieve, Sm 2 o 3 , SBA-3 composite material coated with ASA (ordered mesoporous silicon aluminum oxide) in situ. Background technique [0002] Molecular sieve complex refers to a composite material that combines molecular sieves and other substances through the interaction between molecules, atoms or ions. Regular materials with mesoporous structures such as MCM-41 mesoporous molecular sieves are suitable for the transformation of organic macromolecules due to their large pore structure, but their poor thermal stability, hydrothermal stability and weak acidity limit their Applications of this type of material in the field of catalysis. The research on microporous-mesoporous composite materials based on high stability and strong acidic microporous molecular sieves has important industrial application value. [0003] With th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/80
CPCB01J29/80B01J2229/16B01J35/617B01J35/635B01J35/633B01J35/647
Inventor 李海岩秦丽红刘百军于春梅孙发民王燕陈超王亮王甫村张文成郭金涛董春明张全国郭立艳吕倩靳丽丽倪术荣谢方明杨晓东山义明司朝霞方文章高晓宇李实亓荣彬
Owner PETROCHINA CO LTD
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