Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Preparation and application of a nano-nickel/silver/copper composite catalyst

A composite catalyst and nano-nickel technology, which is applied in the preparation of organic compounds, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problems of reducing the purity of the main product and producing by-products , to avoid high temperature and high pressure reaction, increase profit value, and achieve high product purity

Inactive Publication Date: 2015-11-11
JIANGSU UNIV
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, commercial Raney-Ni not only catalyzes the hydrogenation of nitro groups to amino groups, but also catalyzes the hydrogenation of benzene rings, resulting in the generation of by-products and reducing the purity of the main product

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
  • Preparation and application of a nano-nickel/silver/copper composite catalyst
  • Preparation and application of a nano-nickel/silver/copper composite catalyst
  • Preparation and application of a nano-nickel/silver/copper composite catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] 1. Catalyst preparation:

[0032] In the presence of organic modifier dihydrate bis(p-sulfonylphenyl)phenyl phosphine dipotassium salt, using copper nitrate, silver nitrate, nickel oxalate, hydrazine hydrate, absolute ethanol, etc. as raw materials, through wet Nano-nickel / silver / copper composite catalysts were prepared by combining chemical reduction method and template method. In the first step, at room temperature, 0.1 g of organic modifier was dissolved in 20 mL of absolute ethanol solution and 20 mL of poly(styrene / methacrylic acid) solution were mixed with each other. Under magnetic stirring, 20 mL of copper nitrate (0.05 mol / L) ethanol solution was added dropwise to the above mixture, and stirred for 1 h. 20 mL of hydrazine hydrate aqueous solution (0.05 mol / L) was added dropwise to the above mixture, and reacted at 40° C. for 10 h. In the second step, 20 mL of silver nitrate (0.05 mol / L) was added dropwise to the above mixed solution, and after magnetic stirri...

Embodiment 2

[0038]Same as in Example 1, only changing the amount of catalyst: 0.01, 0.02, 0.06, 0.1g, to carry out the selective hydrogenation reaction of p-nitrophenol. The product selectivity and raw material conversion rate obtained are shown in Table 1.

[0039] Table 1. At 0.8MPH 2 The reaction temperature is 120°C, and the reaction time is 8 hours under heat preservation. When the amount of catalyst is different, the selectivity of p-aminophenol and the conversion rate of the raw material of the hydrogenation reaction product of p-nitrophenol are selectively catalyzed by the nano-nickel / silver / copper composite catalyst.

[0040]

Embodiment 3

[0042] Same as Example 1, only changing the temperature of the reactor to 80°C, 100°C, 120°C, 140°C, and 160°C respectively, and carrying out the selective hydrogenation reaction of p-nitrophenol, the results obtained are shown in Table 2.

[0043] Table 2. At 0.8MPH 2 When the amount of catalyst is 0.08g, under different reaction temperatures, under heat preservation for 8 hours, the nano-nickel / silver / copper composite catalyst selectively catalyzes the selectivity of p-aminophenol hydrogenation reaction product of p-nitrophenol and the conversion rate of raw materials

[0044]

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 relates to the preparation and application of a nano-nickel / silver / copper (Ni / Ag / Cu) composite catalyst and belongs to the field of nano-catalyst preparation and catalytic research. The preparation comprises the following steps: preparing a hollow Ni / Ag / Cu composite nano-catalyst by using copper nitrate, silver nitrate and nickel nitrate as raw materials; performing reaction through the catalyst by using p-nitrophenol and absolute ethyl alcohol as the raw materials to raise the reaction temperature to 80-160 DEG C, maintaining the temperature, and reacting for 2-8h to obtain high-purity p-aminophenol. The hollow Ni / Ag / Cu composite nano-catalyst is in a spherical particle shape, is small in dosage and is high in catalytic activity and stability. A method for preparing the p-aminophenol through the nano-Ni / Ag / Cu composite catalyst is simple in process requirement and meets an industrialization requirement.

Description

technical field [0001] The invention relates to the preparation and application of a nano-nickel / silver / copper composite catalyst, which belongs to the field of nano-catalysis. Background technique [0002] In recent years, nanoscience and nanotechnology have attracted widespread attention in many fields such as catalysis, medicine, communication, biology, and environmental protection, and have become one of the most active fields of research and development in the world. Due to the small size of nanoparticles, the volume percentage of the surface is large, the bonding state and electronic state of the surface are different from those inside the particles, and the incomplete coordination of surface atoms leads to an increase in the active sites on the surface, which makes it a basic condition for being a catalyst. . It has been reported that nano-metal particles, such as palladium, platinum, rhodium, ruthenium, gold, and nickel, exhibit higher catalytic activity in catalyti...

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
Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/89B01J35/08B82Y40/00C07C215/76C07C213/02
Inventor 王爱丽殷恒波冯永海沈灵沁季玉琴
Owner JIANGSU UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com