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Preparation method of Y/SAPO-34/ZSM-11/ASA hierarchical porous material

A technology of SAPO-34 and ZSM-11, which is applied in the field of preparation of Y/SAPO-34/ZSM-11/ASA hierarchical porous materials, can solve the problem of large loss of specific surface area and pore volume, poor thermal stability, and loss of catalytic activity and other problems, to achieve the effect of high silicon-aluminum ratio and improved thermal stability

Active Publication Date: 2019-01-15
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 part in the micro-mesoporous composite material mentioned in the above documents or patents is irregular pores
In the above patents, heteropolyacids are generally loaded or mixed with macroporous amorphous structure materials such as alumina and silica-alumina, but these materials have relatively low specific surface area compared with regular and ordered mesoporous materials, which reduces the specific surface area of ​​heteropolyacids. Catalytic activity
Due to the small pore size of microporous molecular sieves and relatively large heteropolyacid molecules, the loss of specific surface area and pore volume after loading is large, and it is difficult to exert catalytic activity.
The mesoporous molecular sieves developed in recent years have greatly improved the specific surface area, pore volume and pore size of molecular sieves. However, mesoporous molecular sieves such as SBA-15 and MCM-41 have poor thermal stability. Collapse, prone to permanent loss of catalytic activity

Method used

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  • Preparation method of Y/SAPO-34/ZSM-11/ASA hierarchical porous material

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Experimental program
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Effect test

Embodiment 1

[0059] Embodiment 1: the synthesis of Y / SAPO-34 / ZSM-11 / ASA composite material

[0060] (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 65.5g 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: Al 2 o 3 :16SiO2 2 :330H 2 O.

[0061] (2) Preparation of SAPO-34 and ZSM-11 molecular sieve slurry: According to SA...

Embodiment 2

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

[0066] (1) Preparation of guiding agent: Take 28.7g 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: 17Na 2 O: Al 2 o 3 :16SiO2 2 :330H 2 O.

[0067] (2) Preparation of SAPO-34 and ZSM-11 molecular sieve slurry: according to SAPO-34 molecular sieve: ZSM-11 molecular sieve: aqueous solution ratio of 1:0.5:7, disperse 2g of SAPO-34 molecular sieve and 1g of ZSM-11 molecular sieve in 14g of an aqueous solution of 6wt% potassium hydroxide a...

Embodiment 3

[0071] Unless otherwise specified, the sources of each raw material are the same as in Example 1.

[0072] (1) Preparation of guiding agent: Take 20.7g 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 93g 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: 15Na 2 O: Al 2 o 3 :15SiO2 2 :330H 2 O.

[0073] (2) Preparation of SAPO-34 and ZSM-11 molecular sieve slurry: according to SAPO-34 molecular sieve: ZSM-11 molecular sieve: aqueous solution ratio of 1:0.75:3, disperse 2g of SAPO-34 molecular sieve and 1.5g of ZSM-11 molecular sieve In 6g of an aqueous solution of 7wt% potassium hydroxide ...

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Abstract

The invention provides a preparation method of Y / SAPO-34 / ZSM-11 / ASA hierarchical porous material. The invention is characterized in that the method comprises the following steps: synthesizing a guideagent, synthesizing Y / SAPO-34 / ZSM-11 composite molecular sieve by hydrothermal crystallization, adding a surfactant, an alkaline aluminum source and / or alkaline silicon source solution into the slurryof Y / SAPO-34 / ZSM-11 molecular sieve, and washing, drying and roasting the product to obtain the mesoporous Y / SAPO-34 / ZSM-11 / ASA hierarchical porous material.

Description

technical field [0001] The present invention provides a kind of preparation method of Y / SAPO-34 / ZSM-11 / ASA hierarchical porous material. / SAPO-34 / ZSM-11 molecular sieve slurry is added with surfactant, basic aluminum source and / or basic silicon source solution, and the product is washed, dried and calcined to obtain mesoporous Y / SAPO-34 / ZSM- 11 / ASA Composite. 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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B37/08C01B39/54C01B39/36B01J29/85B01J35/10C10G11/02C10G47/16
CPCC10G11/02C10G47/16C01B37/08C01B39/365C01B39/54B01J2229/20B01J35/633B01J35/635B01J35/643B01J35/647
Inventor 李海岩孙发民谢方明姜维张全国丛丽茹赵檀关旭董春明王亮于春梅秦丽红马守涛吴显军张文成郭金涛王刚焦庆雨孙宏磊李军吕倩王甫村
Owner PETROCHINA CO LTD
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