Catalyst for o-Fluoro nitrobenzene hydrogenation and its preparation and application

A technology of o-fluoronitrobenzene and a catalyst is applied in the field of heterogeneous catalytic hydrogenation of nitrobenzene to achieve the effects of reducing the content of nitrobenzene, reducing the temperature and pressure of the hydrogenation reaction, and improving the reaction performance and stability.

Inactive Publication Date: 2005-06-29
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
View PDF5 Cites 33 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Improvement of activated carbon, silica and alumina-supported noble metal catalysts for catalytic hydrogenation of o-fluoronitrobenzene to 4-amino-3-fluorophenol by patent search Report on the catalytic performance of the corresponding substituted p-aminophenol or p-aminophenol by hydrogenation with other substituted nitrobenzene or nitrobenzene

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

[0015] Embodiment 1, Pt / C catalyst

[0016] Weigh 1.5 g of activated carbon carrier, add 2.0 ml of 0.0148 g-Pt / ml concentration of H 2 PtCl 6 solution, and 11ml 1NHCl / HNO 3 mixed solution (HCl / HNO 3 =3.7), after stirring at about 80°C for 6 hours, add anhydrous sodium carbonate to the solution pH=2.75, then add 0.6875 grams of anhydrous sodium acetate, finally add 1.06ml of formic acid solution, stir at about 80°C for 4 hours, pump Filter, wash until the pH value = about 6.5, dry naturally, and dry at 100°C for 4 hours before use.

Embodiment 2

[0017] Embodiment 2, Pt / Al 2 o 3 catalyst

[0018] Weigh 1.5 g of Al 2 o 3 Carrier, other preparation steps are identical with example 1.

Embodiment 3

[0019] Embodiment 3, Pt / SiO 2 catalyst

[0020] Weigh 1.5 g of SiO 2 Carrier, other preparation steps are identical with example 1.

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 concerns the reaction of benzene catalyst adding hydrogen, specific speaking, it's a kind of catalyst to produce 4-ammonia base-3-F benzene fen and its application. The catalyst is made of carrier, active parts and helping dose. The main active parts are: dear metal Pt, Pd or Rh, whose weight is of catalyst 0.1%--20%. Help doses are IA, ó�A, ó¾B, ó° or Sparse soil chemical element. The catalyst has the feature of high active in reactivation, good choosing ability and many reuses. The catalyst can also be used in other replacing nitric unit benzene adding hydrogen and catalyst process.

Description

technical field [0001] The invention relates to heterogeneous catalytic hydrogenation reaction of nitrobenzene, in particular to a catalyst for hydrogenation of ortho-fluoronitrobenzene to produce 4-amino-3-fluorophenol and its preparation and application. Background technique [0002] 4-Amino-3-fluorophenol is an intermediate in the production of benzoylurea, a flufenoxuron-type insecticide, and can be used in the production of phenoxyacetate herbicides as well as 3 , 4,5,6-Tetrahydrobenzopyrrolone-type herbicides and hair dyes and bactericidally active compounds. The traditional synthetic method of 4-amino-3-fluorophenol is to carry out azolation reaction with m-fluorophenol after diazotization of p-aminobenzenesulfonic acid, and then introduce 4-(2-fluoro-4-hydroxyl phenylazo)benzenesulfonic acid, which is reduced in sodium bisulfite to obtain the target product (J.Chem.Soc.1964, p.473). [0003] There have been many patent reports on the production of p-aminophenol thr...

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 Applications(China)
IPC IPC(8): B01J23/56C07C215/76
Inventor 丁云杰潘振栋罗洪原
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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