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

Method for preparing p-benzoquinone by electrocatalytic oxidation of phenylamine

An electrocatalytic oxidation and aniline preparation technology, which is applied in the electrolytic process, electrolytic components, electrolytic organic production, etc., can solve the problems of low primary yield of aniline, insufficient primary utilization of pyrolusite powder, etc., and achieve the effect of improving the oxidation effect

Inactive Publication Date: 2013-03-13
CHONGQING YOUCUI SCI & TECH
View PDF4 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In other words, the prior art still has the disadvantages that the primary utilization rate

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
  • Method for preparing p-benzoquinone by electrocatalytic oxidation of phenylamine
  • Method for preparing p-benzoquinone by electrocatalytic oxidation of phenylamine
  • Method for preparing p-benzoquinone by electrocatalytic oxidation of phenylamine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0012] A method for preparing p-benzoquinone by electrocatalytic oxidation of aniline, the method may further comprise the steps:

[0013] (1) Put the pyrolusite powder and dilute sulfuric acid into the oxidation tank to prepare a solution; then add aniline dropwise to the solution so that the manganese dioxide contained in the pyrolusite powder can oxidize aniline; among them, the pyrolusite powder The manganese dioxide content is 45-60%;

[0014] (2) After the oxidation reaction is completed, the solution is distilled, crystallized, dehydrated and dried to obtain the product p-benzoquinone;

[0015] In the process of dropping aniline in step (1), the present invention performs electrocatalytic oxidation, and the anode current density of the electrocatalytic oxidation is 80-150A / m 2 , the temperature is 0-10°C, and the time is 8-13 hours; the particle size of pyrolusite powder is not greater than 0.15mm (that is, passing through a 100-mesh Taylor standard sieve); the mass pe...

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 method for preparing p-benzoquinone by electrocatalytic oxidation of phenylamine. The method comprises the following steps of: preparing soft manganese mineral powder and dilute sulphuric acid into a solution; dipping phenylamine into the solution; oxidizing phenylamine by manganese dioxide contained in soft manganese mineral powder; and after oxidization reaction is finished, distilling the solution, crystallizing, dewatering and drying to obtain the product p-benzoquinone. By the method, electrocatalysis, reinforcement and oxidization are added during oxidization of phenylamine; the oxidization effect of the original manganese dioxide in the soft manganese mineral powder is improved, and the Mn<2+> which does not basically act is converted into Mn<3+> and Mn<4+> during oxidization so as to reinforce the oxidization process, so that the primary utilization rate of the soft manganese mineral powder is improved, and the primary yield rate of p-benzoquinone is naturally improved.

Description

technical field [0001] The invention relates to a method for preparing p-benzoquinone with aniline as raw material and pyrolusite as oxidant. Background technique [0002] p-Benzoquinone (C 6 h 4 o 2 ) is an important chemical product, mainly used as oxidizing agent, polymerization inhibitor, dye intermediate and rubber anti-aging agent, and can also be used as an initiator of gas accumulation reaction and a raw material for the production of hydroquinone. One of the methods for industrially producing p-benzoquinone is to convert aniline (C 6 h 5 NH 2 ) placed in an acidic medium, with the main component being manganese dioxide (MnO 2 ) pyrolusite powder for oxidation, and then obtained by distillation, crystallization, dehydration and drying. In order to ensure that there is enough manganese dioxide to oxidize, to improve the productive rate of p-benzoquinone, it is usually necessary to add pyrolusite powder in excess, so the pyrolusite residue after the reaction sti...

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): C25B3/02C25B3/23
Inventor 杜军刘作华陶长元费珊珊
Owner CHONGQING YOUCUI SCI & TECH
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