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

Catalyst for preparing p-nitroacetophenone by oxidizing 4-nitroethylbenzene and preparation method of catalyst

A technology of p-nitroacetophenone and p-nitroethylbenzene, which is applied in the field of catalyst and its preparation, can solve the problems of difficult separation of catalyst and product, long reaction time, low catalyst efficiency, etc.

Active Publication Date: 2016-11-23
YANCHENG INST OF IND TECH
View PDF4 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] 1. It is difficult to separate the catalyst and product dispersed in the system, and it is difficult to recycle repeatedly;
[0007] 2. The efficiency of the catalyst is low, and the oxidation reaction time of p-nitroethylbenzene is long

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 p-nitroacetophenone by oxidizing 4-nitroethylbenzene and preparation method of catalyst
  • Catalyst for preparing p-nitroacetophenone by oxidizing 4-nitroethylbenzene and preparation method of catalyst
  • Catalyst for preparing p-nitroacetophenone by oxidizing 4-nitroethylbenzene and preparation method of catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Take by weighing 46g anhydrous cerium trichloride zinc (CeCl 3 ) was dissolved in 250ml of deionized water. After fully dissolving evenly, stir rapidly and add 40% NaOH dropwise to adjust the pH to 12 to obtain a white slurry.

[0019] Weigh 312g manganese sulfate (MnSO 4 ) was dissolved in 1000ml of deionized water. After fully dissolving evenly, stir rapidly and add 40% NaOH dropwise to adjust the pH to 10 to obtain a pink slurry, which was oxidized to a brown slurry.

[0020] Wet grind 660g of clay, 130g of talc and the above two slurries in a ball mill until the powder is less than 320 mesh, add a binder, and go through the extrusion molding process to produce a honeycomb ceramic blank, using a box-type drying furnace at 105°C After drying for 3 hours and firing at 1280°C for 6 hours, the cylindrical honeycomb ceramic catalyst was obtained with a size (mm) of 150×150×300, a number of pores of 25×25, a wall thickness (mm) of 1.0, a pore width of 2.77, and a specific...

Embodiment 2

[0025] Weigh 52g anhydrous cerium trichloride zinc (CeCl 3 ) was dissolved in 250ml of deionized water. After fully dissolving evenly, stir rapidly and add 40% NaOH dropwise to adjust the pH to 12 to obtain a white slurry.

[0026] Weigh 268g manganese sulfate (MnSO 4 ) was dissolved in 1000ml of deionized water. After fully dissolving evenly, stir rapidly and add 40% NaOH dropwise to adjust the pH to 10 to obtain a pink slurry, which was oxidized to a brown slurry.

[0027] Wet grind 665g of clay, 145g of talc and the above two slurries in a ball mill until the powder is less than 320 mesh, add a binder, and go through the process of extrusion molding to produce a honeycomb ceramic blank, using a box-type drying furnace at 105°C After drying for 3 hours and firing at 1260°C for 6 hours, the cylindrical honeycomb ceramic catalyst was obtained with a size (mm) of 150×150×300, a number of pores of 32×32, a wall thickness (mm) of 1.0, a pore width of 3.66, and a specific surface...

Embodiment 3

[0032] Weigh 60g anhydrous cerium trichloride zinc (CeCl 3 ) was dissolved in 250ml of deionized water. After fully dissolving evenly, stir rapidly and add 40% NaOH dropwise to adjust the pH to 12 to obtain a white slurry.

[0033] Weigh 248g manganese sulfate (MnSO 4 ) was dissolved in 1000ml of deionized water. After fully dissolving evenly, stir rapidly and add 40% NaOH dropwise to adjust the pH to 10 to obtain a pink slurry, which was oxidized to a brown slurry.

[0034] Wet grind 680g of clay, 107g of talc and the above two slurries in a ball mill until the powder is less than 320 mesh, add a binder, and go through the process of extrusion molding to produce a honeycomb ceramic blank, using a box-type drying furnace at 105°C After drying for 3 hours and firing at 1260°C for 6 hours, the cylindrical honeycomb ceramic catalyst was obtained with a size (mm) of 150×150×300, a number of pores of 40×40, a wall thickness (mm) of 0.7, a pore width of 3.03, and a specific surface...

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

PropertyMeasurementUnit
thicknessaaaaaaaaaa
widthaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention provides a catalyst for preparing p-nitroacetophenone by oxidation of p-nitroethylbenzene and a preparation method thereof, which is a kind of catalyst with clay and talc as the main constituent raw materials, adding cerium (+3 valence), manganese (+2 )’s hydroxide is wet-milled in a ball mill to a powder particle size of less than 320 mesh, and a binder with MC or PVA as the main component is added, and the honeycomb ceramic blank is produced through the process of extrusion molding, which is fired at 1240-1280°C prepared catalyst. The catalyst includes active catalytic components cerium oxide, manganese dioxide and a ceramic carrier. Ce of the present invention 2 o 3 -MnO 2 / The honeycomb ceramic catalyst with ceramic carrier has the characteristics of good catalytic effect and long service life. The method is used to prepare p-nitroacetophenone by catalyzing p-nitroethylbenzene with pure oxygen, and the yield of p-nitroacetophenone is above 65%.

Description

Technical field: [0001] The invention provides a catalyst for preparing p-nitroacetophenone by oxidizing p-nitroethylbenzene and a preparation method thereof. Background technique: [0002] p-Nitroacetophenone (PNAP) is an important intermediate in organic synthesis, widely used in the synthesis of pharmaceuticals, pesticides and chiral intermediates. p-Nitroacetophenone was prepared by oxidation of p-nitroethylbenzene, and the ketone group was obtained by controlling the depth of direct oxidation of α-H on the side chain of aromatic hydrocarbons. Early selection of some highly oxidizing chemical oxidants, such as: KMnO 4 、H 2 o 2 and CrO3 etc. The use of oxygen as the oxidant has the dual advantages of economic cost and environmental protection compared with chemical oxidants. At present, the industrial production method of p-nitroacetophenone is: add p-nitroethylbenzene into the oxidation tower, then add cobalt stearate and manganese acetate catalysts, and feed compre...

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): B01J23/34C07C201/12C07C205/45
Inventor 项东升孙开进朱驯
Owner YANCHENG INST OF IND 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