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Hierarchical pore ZSM-5 molecular sieve, and preparation method and application thereof

A ZSM-5, multi-stage pore technology, applied in the field of molecular sieves, can solve the problems of difficulty in subsequent separation of products, increase in product production costs, and difficulty in improving the yield of 2,5-furandimethanol dimethyl ether, and achieve good application. Prospect, effect of excellent stability

Active Publication Date: 2019-04-26
ZHEJIANG SUGAR ENERGY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the researchers optimized the ZSM-5 molecular sieve silicon-aluminum ratio, reaction material ratio, reaction temperature, reaction time and other factors, the yield of 2,5-furandimethanol dimethyl ether is still difficult to increase
The complex product system not only easily leads to the deactivation of the catalyst, but also brings many difficulties to the subsequent separation of the product, which greatly increases the production cost of the product

Method used

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  • Hierarchical pore ZSM-5 molecular sieve, and preparation method and application thereof
  • Hierarchical pore ZSM-5 molecular sieve, and preparation method and application thereof
  • Hierarchical pore ZSM-5 molecular sieve, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0094] Example 1 Sample 1 # preparation

[0095] Mix 0.59g of aluminum isopropoxide, 12g of tetrapropylammonium hydroxide, 13mL 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 72h, and then transferred to a 250mL stainless steel hydrothermal kettle with a polytetrafluoroethylene liner. The polytetrafluoroethylene liner contained 50mL of water and crystallized at 170°C for 75h; filtered and washed After that, the multi-stage porous ZSM-5 molecular sieve sample was obtained, which was designated as sample 1 # .

Embodiment 2

[0096] Example 2 Sample 2 # preparation of

[0097] Mix 0.40g of aluminum isopropoxide, 12g of tetrapropylammonium hydroxide, 13mL 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 72h, and then transferred to a 250mL stainless steel hydrothermal kettle with a polytetrafluoroethylene liner. The polytetrafluoroethylene liner contained 50mL of water and crystallized at 175°C for 70h; filtered and washed After that, the multi-stage porous ZSM-5 molecular sieve sample was obtained, which was designated as sample 2 # .

Embodiment 3

[0098] Example 3 Sample 3 # preparation of

[0099] Mix 0.238g of aluminum isopropoxide, 12g of tetrapropylammonium hydroxide, 13mL 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 72h, and then transferred to a 250mL stainless steel hydrothermal kettle with a polytetrafluoroethylene liner. The polytetrafluoroethylene liner contained 50mL of water and crystallized at 175°C for 72h; filtered and washed After that, the multi-stage porous ZSM-5 molecular sieve sample was obtained, which was designated as sample 3 # .

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Abstract

This application discloses a hierarchical pore ZSM-5 molecular sieve, a preparation method thereof and application of the hierarchical pore ZSM-5 molecular sieve to the method that the hierarchical pore ZSM-5 molecular sieve serves as a catalyst to catalyze 2,5-furandimethanol and monohydric alcohol etherification for preparing 2,5-furandimethanol dimethyl ether. The pore diameter of mesopores inthe hierarchical pore ZSM-5 molecular sieve is 2-6 nm, and the pore volume of the mesopores is 0.4-0.6 mL / g. The invention further relates to the preparation method of the hierarchical pore ZSM-5 molecular sieve and the application of the hierarchical pore ZSM-5 molecular sieve serving as the catalyst in a 2,5-furandimethanol and monohydric alcohol etherification reaction.

Description

technical field [0001] This application relates to a multi-level porous ZSM-5 molecular sieve and its preparation method, and its application in the method of preparing 2,5-furandimethanol dimethyl ether by catalyzing the etherification of 2,5-furandimethanol and monohydric alcohol as a catalyst , belonging to the field of molecular sieves. Background technique [0002] 2,5-Furandimethanol dimethyl ether (BMMF) is a potential fuel additive due to its high energy density and good fuel miscibility. At present, studies on the preparation of monoether furfural by etherification of 5-hydroxymethylfurfural (HMF) with alcohols such as methanol and ethanol have been widely reported, but the residual aldehyde molecules in the molecule greatly reduce the stability of the molecule. BMMF is prepared by selective hydrogenation of HMF to 2,5-furandimethanol (BHMF), which is then prepared by etherification with methanol. Compared with monoether furfural (HMF is directly etherified with m...

Claims

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Application Information

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IPC IPC(8): C01B39/40B01J29/40B01J29/90B01J38/48C07D307/42
CPCB01J29/40B01J29/90B01J38/48C01B39/40C01P2002/72C07D307/42Y02P20/584
Inventor 胡华雷方雯婷杨勇胡丹鑫王磊张建
Owner ZHEJIANG SUGAR ENERGY TECH CO LTD
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