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

Method for preparing o-chloroaniline

A technology for o-chloroaniline and o-chloronitrobenzene is applied in the field of liquid-phase catalytic hydrogenation of o-chloronitrobenzene to produce o-chloroaniline, and can solve the problems of lowering product quality, increasing production cost, serious dechlorination, etc. Low, dehydrogenation inhibition, high yield effect

Inactive Publication Date: 2005-08-31
ZHEJIANG UNIV OF TECH
View PDF2 Cites 12 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patented process allows for efficient production of an intermediate product called o-Chlorobenzoximidazole (OCA) that has various benefits such as improved efficiency or lower costs compared to traditional methods like nitrone oxide reduction reaction(NRR).

Problems solved by technology

This patented technical solution described involves improving the efficiency or effectiveness of producing opium oxynate (OXON). However, current techniques involve expensive processes such as hydrocracking, acidic nitrification, solvent extraction, and other steps like addition of antimony compounds. These solutions also increase manufacturing costs while limiting their practicality outside industrial settings where large quantities of these materials may exist.

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] In a 100ml stainless steel high-pressure reactor, add 2g of o-chloronitrobenzene, 0.45g of Ru / C catalyst, 30ml of ethanol solution with a mass percentage of 95%, close the reactor, replace the air with nitrogen for 3 times, start stirring, and heat up to 210 ℃, reacted for 6 hours, stopped the reaction, took out the reaction solution, filtered out the catalyst, and the filtrate was analyzed by gas chromatography for the content of each component. The results showed that the conversion rate of o-chloronitrobenzene was 91.6%, and the selectivity of o-chloroaniline was 88.7%. %.

Embodiment 2

[0014] In a 100ml stainless steel high-pressure reactor, add 2g o-chloronitrobenzene, 0.45g Ru / C catalyst, 30ml mass percentage is 95% ethanol solution, close the reactor, replace the air with nitrogen for 3 times, start stirring, and heat up to 180°C , reacted for 6 hours, stopped the reaction, took out the reaction solution, filtered out the catalyst, and the filtrate was analyzed by gas chromatography for the content of each component. The results showed that the conversion rate of o-chloronitrobenzene was 26.2%, and the selectivity of o-chloroaniline was 97.4%. .

Embodiment 3

[0016] In a 100ml stainless steel high-pressure reactor, add 2g o-chloronitrobenzene, 0.45g NiB amorphous catalyst, 30ml mass percent as 95% ethanol solution, close the reactor, replace the air with nitrogen for 3 times, start stirring, and heat up to 210 DEG C, reacted for 6 hours, stopped the reaction, took out the reaction solution, filtered out the catalyst, and the filtrate was analyzed by gas chromatography for the content of each component. The results showed that the conversion rate of o-chloronitrobenzene was 22.1%, and the selectivity of o-chloroaniline was 89.7%.

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

A process for preparing O-chlorophenylamine from O-chloronitrobenzene features that under existance of alcohol and the catalyst chosen from Ru/C, non-crystalline NiB, Ni-Fe-B and Ni-Co-B, the O-chloronitrobenzene takes part in catalytic hydrogenation reaction at 150-250 deg.C and then is post-treated to obtain said product. It has high output rate.

Description

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

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
Owner ZHEJIANG UNIV OF 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