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Supported bifunctional catalyst and preparation method and application thereof

A dual-function catalyst, supported technology, applied in the chemical field, achieves high practicality and industrialization prospects, high catalytic activity, and reduced side reactions

Active Publication Date: 2020-07-10
中科租赁(天津)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, there are few reports on the application of bifunctional catalysts to catalyze the one-step preparation of BEMF from HMF in a fixed-bed reactor.

Method used

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  • Supported bifunctional catalyst and preparation method and application thereof
  • Supported bifunctional catalyst and preparation method and application thereof
  • Supported bifunctional catalyst and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0076] The pretreatment of embodiment 1 catalyst carrier

[0077] The Beta molecular sieve purchased from Nankai Catalyst Factory was roasted at 550°C for 8 hours, then ground, tableted, crushed, and sieved, and the particle size of 20-40 mesh was taken as the catalyst carrier sample. Among them, the silicon-aluminum ratio of the Beta molecular sieve carrier is 25, and the specific surface area is 670m 2 / g.

Embodiment 2

[0078] The preparation of embodiment 2 bifunctional catalysts

[0079] CAT-1 # Preparation of Catalyst Sample Cu / Beta

[0080] Weigh 0.95g of copper nitrate trihydrate and dissolve it in 6.5mL of deionized water, and load it on 5.0g of catalyst precursor Beta by equal-volume impregnation method. Put it into a tube furnace at 300°C for hydrogen reduction for 3 hours to prepare a supported bifunctional catalyst Cu / Beta, which is denoted as CAT-1 # sample.

[0081] CAT-2 # Preparation of Catalyst Sample Ni / Beta

[0082] Weigh 1.23g of nickel nitrate hexahydrate and dissolve it in 6.5mL of deionized water, and load it on 5.0g of catalyst precursor Beta by equal-volume impregnation method. Put it into a tube furnace at 300°C for hydrogen reduction for 3 hours to prepare a supported bifunctional catalyst Ni / Beta, denoted as CAT-2 # sample.

[0083] CAT-3 # Preparation of Catalyst Sample Cu-Na / Beta

[0084] Weigh 0.22g of sodium nitrate and dissolve it in 6.5mL of deio...

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Abstract

The present invention provides a supported bifunctional catalyst which comprises a molecular sieve carrier, a component A and a component B which are supported on the molecular sieve carrier, and thechemical composition general formula of the catalyst is A-B / Beta, wherein the component A comprises a transition metal element which is a hydrogenation active center, the component B comprises an alkali metal element or an alkaline earth metal, and the molecular sieve carrier comprises a Beta molecular sieve. The invention also provides a preparation method and application of the supported bifunctional catalyst. The supported bifunctional catalyst can be used for preparing 2, 5-furandimethanol diethyl ether (BEMF) through one-step hydrogenation etherification of 5-hydroxymethylfurfural (HMF) catalyzed by the fixed bed, and has high hydrogenation activity and acid catalysis performance, and the HMF conversion rate and the target product yield can reach 99% or above and 75% or above respectively.

Description

technical field [0001] The application relates to a supported bifunctional catalyst, its preparation method and its application in the one-step preparation of 2,5-furandimethanol diethyl ether by catalyzing 5-hydroxymethylfurfural, which belongs to the field of chemistry. Background technique [0002] 2,5-Dialkylfurandimethanol (BEMF) has high energy density, high molecular stability and good fuel miscibility, and is a potential new clean bio-based fuel additive. At present, most of the literatures use a two-step method to prepare BEMF, that is, firstly prepare 2,5-furandimethanol (BHMF) by catalytic hydrogenation of HMF, and the latter is further obtained by etherification reaction with ethanol. The one-step process can avoid the separation and purification of intermediate products, and has the advantages of simple operation, low production cost, energy saving and consumption reduction. However, most of the one-step methods reported in the existing literature use tank reac...

Claims

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Application Information

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IPC IPC(8): B01J29/76C07D307/42
CPCB01J29/7615C07D307/42B01J2229/18B01J35/394
Inventor 王磊胡华雷金海涛张建胡丹鑫杨勇
Owner 中科租赁(天津)有限公司
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