Heterogeneous catalyst for selective hydrogenation reaction of aryl nitro-compound and application of heterogeneous catalyst

A technology of aromatic nitro compounds and heterogeneous catalysts, which is applied in the preparation of amino compounds, organic compounds, physical/chemical process catalysts, etc. It can solve the problems of easy deactivation, low selectivity, and limited catalyst application, etc., to achieve The effect of easy product structure, good dispersion and low production cost

Active Publication Date: 2014-12-03
ZHEJIANG UNIV
View PDF4 Cites 37 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although metal catalysts supported on carbon tubes are widely used, these catalysts also have inherent weaknesses
Such as the catalyst is easily deactivated in the air, and the selectivity is no

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Heterogeneous catalyst for selective hydrogenation reaction of aryl nitro-compound and application of heterogeneous catalyst
  • Heterogeneous catalyst for selective hydrogenation reaction of aryl nitro-compound and application of heterogeneous catalyst
  • Heterogeneous catalyst for selective hydrogenation reaction of aryl nitro-compound and application of heterogeneous catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Example 1 Heterogeneous catalyst based on Fe and nitrogen doped carbon nanotubes

[0027] Add 1g of glucosamine hydrochloride and 200ml of deionized water into a 250ml beaker, stir to dissolve, then add 1.6g of ferric nitrate, and stir until a uniform solution. Add 20g melamine then, dissolve in the above-mentioned glucosamine hydrochloride solution. Heat and stir until the deionized water is completely volatilized to obtain a solid mixture. After the mixture is calcined in a nitrogen furnace through a two-stage heating program (600°C for 1h and 900°C for 1h), the FeO with a composition of 26wt% is obtained. x (0

Embodiment 2

[0028] Example 2 Heterogeneous catalyst based on Co and nitrogen doped carbon nanotubes

[0029] Add 1g of glucosamine hydrochloride and 200ml of deionized water into a 250ml beaker, stir to dissolve, then add 0.95g of cobalt nitrate, and stir to a uniform solution. Then add 40g of melamine, dissolved in the above-mentioned glucosamine hydrochloride solution. Heat and stir until the deionized water is completely volatilized to obtain a solid mixture. After the mixture is calcined in a nitrogen furnace through a two-stage heating program (600°C for 1h and 800°C for 1h), a CoO with a composition of 28wt% is obtained. x (0

Embodiment 3

[0030] Example 3 Heterogeneous catalyst based on Co and nitrogen doped carbon nanotubes

[0031] Add 1g of glucosamine hydrochloride and 200ml of deionized water into a 250ml beaker, stir to dissolve, then add 0.95g of cobalt nitrate, and stir to a uniform solution. Add 20g melamine then, dissolve in the above-mentioned glucosamine hydrochloride solution. Heat and stir until the deionized water is completely volatilized to obtain a solid mixture. After the mixture is calcined in a nitrogen furnace through a two-stage heating program (600°C for 1h and 900°C for 1h), a CoO with a composition of 31wt% is obtained. x (0

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a heterogeneous catalyst for selective hydrogenation reaction of an aryl nitro-compound. The heterogeneous catalyst consists of 10-90 weight percent of base metal particles and 10-90 weight percent of nitrogen-doped carbon nano tubes, wherein the nitrogen content in the nitrogen-doped carbon nano tubes is 0.01-20.0 weight percent. The preparation method comprises the following steps: by taking a carbohydrate as a raw material, uniformly mixing the carbohydrate with an artificial template agent in the presence of base metal salts, preserving the temperature of 400-650 DEG C for 0.5-2 hours in an inert atmosphere, raising the temperature to 700-1200 DEG C, and calcining for 0.5-2 hours, thereby obtaining the heterogeneous catalyst. The heterogeneous catalyst containing base metals is generated in situ through a specific method, is stable to air and water heat, is applied to the selective hydrogenation reaction of the aryl nitro-compound and has excellent catalytic activity and selectivity.

Description

technical field [0001] The invention relates to the field of catalyst preparation, in particular to a heterogeneous catalyst for selective hydrogenation of aromatic nitro compounds and its application. Background technique [0002] Functionalized amine-based compounds (such as aniline, methylaniline, phenol-aniline, halogenated aniline, cyanoaniline, amidoaniline, etc.) are important industrial raw materials, mainly used in the manufacture of important intermediates such as dyes, medicines, spices, and pesticides. body. Due to the atom economy and environmental friendliness, the selective catalytic hydrogenation of aromatic nitro compounds is a direct and efficient method for the preparation, and the key of this method is to control the selectivity of catalytic hydrogenation. [0003] The research on the selective hydrogenation of aromatic nitro compounds to functional amino compounds has always been a hot topic. Literature (Science, 2006, 313, 332-334) introduced a kind o...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): B01J27/24C07C211/46C07C209/36
Inventor 王勇魏中哲王静
Owner ZHEJIANG UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap