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Metal-supported hierarchical-pore ZSM-5 molecular sieve and preparation method and application thereof

A ZSM-5, multi-level pore technology, applied in the field of molecular sieves, can solve the problem of reducing the selectivity of target products, and achieve the effects of good application prospects, excellent stability, high activity and selectivity

Pending Publication Date: 2020-08-07
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although increasing the reaction temperature can speed up the reaction rate, it also greatly reduces the selectivity of the target product

Method used

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  • Metal-supported hierarchical-pore ZSM-5 molecular sieve and preparation method and application thereof
  • Metal-supported hierarchical-pore ZSM-5 molecular sieve and preparation method and application thereof
  • Metal-supported hierarchical-pore ZSM-5 molecular sieve and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0114] Example 1 Sample 1 # preparation

[0115] Mix 0.12g of aluminum isopropoxide, 12g of tetrapropylammonium hydroxide, 14mL of ethyl orthosilicate, 1.6mL of hexadecyltrimethoxysilane and 50mL of ethanol in a beaker, and stir at 25°C until a gel is formed; The gel was dried at 25°C for 48 h and placed in a 50 mL liner, and then the liner was transferred to a 250 mL stainless steel hydrothermal kettle with a polytetrafluoroethylene liner, and 60 mL of deionized water was added between the two liners to provide The water vapor atmosphere required for crystallization was crystallized at 180°C for 72 hours; after filtering, washing, drying at 110°C for 3 hours, and calcination at 550°C for 7 hours, the hierarchically porous ZSM-5 molecular sieve sample was obtained. for sample 1 # .

Embodiment 2

[0116] Example 2 Sample 2 # preparation

[0117] Mix 0.12g of aluminum isopropoxide, 12g of tetrapropylammonium hydroxide, 14mL of ethyl orthosilicate, 1.6mL of hexadecyltrimethoxysilane and 50mL of ethanol in a beaker, and stir at 25°C until a gel is formed; The gel was dried at 25°C for 48 h and placed in a 50 mL liner, and then the liner was transferred to a 250 mL stainless steel hydrothermal kettle with a polytetrafluoroethylene liner, and 60 mL of deionized water was added between the two liners to provide The water vapor atmosphere required for crystallization was crystallized at 180°C for 72 hours; after filtration, washing, drying at 110°C for 3 hours, and calcination at 550°C for 7 hours, the hierarchically porous ZSM-5 molecular sieve 1 was obtained. # sample. Take 0.1g stannous chloride dihydrate and add it to 4g deionized water, then add 4g hierarchical porous ZSM-5 molecular sieve 1 # Immerse for 48 hours, dry, and bake at 550°C for 7 hours to obtain the metal...

Embodiment 3

[0118] Example 3 Sample 3 # preparation of

[0119] Mix 0.10g of aluminum isopropoxide, 12g of tetrapropylammonium hydroxide, 14mL of ethyl orthosilicate, 1.6mL of hexadecyltrimethoxysilane and 50mL of ethanol in a beaker, and stir at 25°C until a gel is formed; The gel was dried at 25°C for 48 h and placed in a 50 mL liner, and then the liner was transferred to a 250 mL stainless steel hydrothermal kettle with a polytetrafluoroethylene liner, and 50 mL of deionized water was added between the two liners to provide The water vapor atmosphere required for crystallization was crystallized at 175°C for 72 hours; after filtration, washing, drying at 110°C for 2 hours, and calcination at 550°C for 6 hours, the hierarchically porous ZSM-5 molecular sieve sample was obtained. for sample 3 # .

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Abstract

The invention discloses a metal-supported hierarchical-pore ZSM-5 molecular sieve. The metal-supported hierarchical-pore ZSM-5 molecular sieve contains mesopores; the average pore diameter of the mesopores is 2-20 nm, and the pore volume of the mesopores is 0.2-0.6 mL / g; and a metal element in the metal-supported hierarchical-pore ZSM-5 molecular sieve is at least one selected from Sn, Mg and Zn,the loading amount of the metal element is 0.1 wt%-10wt%, and a metal loading amount is calculated according to the loading amount of the metal element. The invention also relates to a preparation method of the ZSM-5 molecular sieve and application of the ZSM-5 molecular sieve as a catalyst in catalyzing an etherification reaction of 2,5-furandimethanol and ethanol on a fixed-bed reactor.

Description

technical field [0001] This application relates to a metal-supported multi-level porous ZSM-5 molecular sieve and its preparation method, and as a catalyst in a fixed bed reactor to catalyze the etherification of 2,5-furandimethanol and ethanol to prepare 2,5-furandimethanol dimethanol The application in the method of ethyl ether belongs to the field of molecular sieves. Background technique [0002] 5-Ethoxymethylfurfural (EMF) is the etherification product of 5-hydroxymethylfurfural (HMF) and ethanol, due to its high energy density (8.7kW h L -1 ) and good fuel mixing, it is considered as a potential bio-based fuel additive. At present, there have been many reports on the preparation of monoether by the etherification of monohydric alcohols such as HMF and ethanol, and a more in-depth understanding of the relationship between the reaction and the acidity of the catalyst. However, there is still an aldehyde group present in the EMF molecule, which reduces the stability of...

Claims

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Application Information

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IPC IPC(8): B01J29/40C07D307/60
CPCB01J29/405B01J29/40C07D307/60B01J2229/18Y02P20/584
Inventor 胡华雷胡丹鑫金海涛张建王磊杨勇卢国文杨杰陈慧贺怡
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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