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y/gd 2 o 3 /zsm-23/zsm-5/asa composite material and preparation method thereof

A technology of ZSM-23 and ZSM-5, which is applied in the field of Y/Gd2O3/ZSM-23/ZSM-5/ASA composite material and its preparation, can solve the problems of long preparation time, increased cost of synthesizing composite molecular sieve, complicated process, etc.

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/gd <sub>2</sub> o <sub>3</sub> /zsm-23/zsm-5/asa composite material and preparation method thereof
  • y/gd <sub>2</sub> o <sub>3</sub> /zsm-23/zsm-5/asa composite material and preparation method thereof
  • y/gd <sub>2</sub> o <sub>3</sub> /zsm-23/zsm-5/asa composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] Y / Gd 2 o 3 Synthesis of / ZSM-23 / ZSM-5 / ASA Composite

[0055] (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.

[0056] (2)Gd 2 o 3 / ZSM-23 / ZSM-5 precursor preparation: using a solid-phase synthesis method (singl...

Embodiment 2

[0061] Unless otherwise specified, the sources of each raw material are the same as in Example 1.

[0062] (1) Preparation of guiding agent: Take 32.1g 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 112g of water glass into 79g 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: 20Na 2 O: Al 2 o 3 :18SiO2 2 :440H 2 O.

[0063] (2)Gd 2 o 3 / ZSM-23 / ZSM-5 precursor preparation: using a solid-phase synthesis method (single-pot solid content 50%), using coarse-pore silica gel, sodium metaaluminate, deionized water, trimethylamine and hexamethylenediamine as raw materials, At 100°C, crystallize at constant temperature for...

Embodiment 3

[0068] Unless otherwise specified, the sources of each raw material are the same as in Example 1.

[0069] (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.

[0070] (2)Gd 2 o3 / ZSM-23 / ZSM-5 precursor preparation: using a solid-phase synthesis method (single-pot solid content 50%), using coarse-pore silica gel, sodium metaaluminate, deionized water, trimethylamine and hexamethylenediamine as raw materials, At 180°C, crystallize at constant temperature...

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Abstract

The invention provides a method for preparing a Y / Gd2O3 / ZSM-23 / ZSM-5 / ASA composite material containing regular mesopores. The method comprises the following steps: firstly, preparing a guiding agent, preparing a Gd2O3 / ZSM-23 / ZSM-5 precursor; synthesizing a Y / Gd2O3 / ZSM-23 / ZSM-5 composite molecular sieve by adopting a hydrothermal crystallization method; adding a surfactant and an alkaline aluminum-source solution into the slurry containing the molecular sieve, adjusting the pH value; and washing, drying and roasting the precipitated product to obtain the Y / Gd2O3 / ZSM-23 / ZSM-5 / ASA composite material. In the Y / Gd2O3 / ZSM-23 / ZSM-5 / ASA composite material, the differential thermal failure temperature of the Y molecular sieve can be higher than 950 DEG C, 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 / Gd 2 o 3 / ZSM-23 / ZSM-5 / ASA composite material and preparation method thereof, specifically, is a kind of by Y molecular sieve, Gd 2 o 3 , ZSM-23 / ZSM-5 molecular sieve and amorphous silica-alumina (ASA) composite material coated 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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/80
Inventor 李海岩赵晶莹谢方明孙发民秦丽红王斯晗于春梅王燕王亮张文成郭金涛张志华王伟众吕倩张全国郭立艳倪术荣王甫村靳丽丽董春明王旭东王广飞丰铭李金鑫
Owner PETROCHINA CO LTD
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