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

Catalyst for preparing 2,2'-bipyridine by pyridine coupling and preparation method and application thereof

A catalyst, bipyridine technology, applied in catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve problems such as catalyst failure and reaction yield decline, and achieve good stability, high activity, high Effects of activity and stability

Pending Publication Date: 2020-02-18
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
View PDF8 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The method still uses pyridine and Raney nickel catalysts, and the reaction temperature is controlled between 200-240°C (in the experiment, it is best to carry out at 220°C), because the reaction temperature is too high to cause the catalyst to fail quickly, and the temperature is too low to make the reaction Yield drop

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
  • Catalyst for preparing 2,2'-bipyridine by pyridine coupling and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The spherical alumina carrier containing 3.0% silica is treated with one or more solutions of about 3% oxalic acid, nitric acid, sulfuric acid and hydrochloric acid at 80°C, then washed 1-2 times with water, and dried at 120°C. Calcined at 650°C for 3 hours to obtain a catalyst carrier;

[0021] According to the content of the active component nickel, nickel nitrate and polyvinylpyrrolidone were dissolved in water to form a solution. After vacuuming the modified alumina carrier, the impregnation solution was sucked into the carrier by conventional impregnation method, and then aged at 80 °C 2 hours, drying at 80°C for 6 hours, drying at 120°C for 12 hours, and calcination at 450°C for 3 hours; the calcined catalyst was reduced by passing hydrogen at 550°C for 5 hours.

[0022] Catalyst A prepared in this example contains 21% nickel, and 5% polyvinylpyrrolidone is added to the impregnation solution.

Embodiment 2

[0024] Catalyst B is prepared in the same manner as in Example 1, except that the nickel content of the catalyst is 25%, and 2% cetyltrimethylammonium bromide (CTAB) and 3% polyvinylpyrrolidone (PVP) are added in the impregnation solution. ).

Embodiment 3

[0026] Catalyst C was prepared in the same manner as in Example 1, except that the nickel content of the catalyst was 30%, and 5% polyvinylpyrrolidone (PVP) was added to the impregnation solution.

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 provides a catalyst for preparing 2,2'-bipyridine by pyridine coupling and a preparation method and application thereof. The catalyst takes nickel as a main active component, and macroporous alumina modified by one or more of silica, oxalic acid, nitric acid, sulfuric acid and hydrochloric acid as a carrier, and adopts a conventional impregnation method to prepare the nickel / aluminacatalyst. During impregnation, L-arginine, cetyltrimethylammonium bromide (CTAB), polyvinylpyrrolidone (PVP) and the like are added to promote metal dispersion. The catalyst can be used to realize continuous reaction for preparing the 2,2'-bipyridine by pyridine coupling in a fixed bed reactor.

Description

technical field [0001] The invention belongs to the technical field of organic synthesis, and in particular relates to a catalyst for preparing 2,2'-bipyridine through pyridine coupling, a preparation method and an application thereof. Background technique [0002] 2,2'-Bipyridine is an important fine chemical and drug synthesis intermediate, at the same time, it is also a unique chelating agent, used to detect metal ion indicators, photosensitizers and ligands for metal organic catalysts, etc. . Especially in recent years, with the prohibition of the highly toxic herbicide paraquat, the synthesis and production of the less toxic herbicide diquat will be put on an important agenda. The main raw material for the synthesis of diquat is 2,2'-bipyridine. Therefore, this product has important social significance and industrial application prospects for the development of pyridine downstream products, especially the development and production of low-toxicity pesticides. [0003]...

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): B01J23/755C07D213/127C07D213/22
CPCB01J37/0207B01J37/0018B01J23/755C07D213/22C07D213/127B01J35/394
Inventor 王玉忠刘盛林徐龙伢朱向学李秀杰谢素娟陈福存张爽
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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