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Solid catalyst for arene selective oxidation and its preparation and uses

A solid catalyst, selective oxidation technology, applied in the direction of catalyst activation/preparation, physical/chemical process catalyst, organic compound preparation, etc., can solve the difficulty of catalyst recovery, uncatalyzed stability research, and the important influence of catalyst activity without research and other problems, to achieve the effect of good reusability and good catalytic stability

Inactive Publication Date: 2008-08-06
NANJING TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The most obvious disadvantage of using pure heteropolyacids as homogeneous catalysts to catalyze the liquid-phase synthesis of phenol from benzene is the difficulty in catalyst recovery.
To solve this problem, Peng et al. prepared a Cs n h 5-n PMo 10 V 2 o 40 -SiO 2 Catalytic materials, found to have higher catalytic activity in the selective oxidation of benzyl alcohol to benzaldehyde (Ge Peng, Yonghui Wang, Changwen Hua, Enbo Wang, Shouhua Feng, Yongchun Zhou, Hong Ding, Yanyong Liu.Appl.Catal. A Gen., 2001, 218, 91-99), but they did not study the important influence of the content of active species V in the catalyst on the catalytic activity, nor did they study the catalytic stability of the material
In addition, up to now, no immobilized vanadium-containing heteropolyacids have been applied to the selective oxidation of benzene to phenol.

Method used

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  • Solid catalyst for arene selective oxidation and its preparation and uses
  • Solid catalyst for arene selective oxidation and its preparation and uses

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0030] 5%H4 PMo 11 VO 40 Preparation and catalytic performance of / SG catalyst

[0031] h 4 PMo 11 VO 40 Preparation: 7.1g Na 2 HPO 4 (Sinopharm Chemical Reagent Co., Ltd., analytical grade) was dissolved in 100 mL of distilled water, 6.1 g of sodium metavanadate (Shanghai Reagent No. 5mL concentrated sulfuric acid (Sinopharm Chemical Reagent Co., Ltd., analytically pure); 133g Na 2 MoO 4 2H 2 O (Shanghai Reagent No. 4 Factory, analytically pure) was dissolved in 200 mL of distilled water, and the solution was added to the above mixture under stirring, and after stirring evenly, 85 mL of concentrated sulfuric acid was slowly added dropwise to make the solution gradually change from deep red to light red. After cooling, extract the heteropolyacid with 400mL of ether, then blow off the ether in the etherified product with air, then dissolve the obtained orange solid in 50mL of distilled water, concentrate in a vacuum desiccator until crystallization, recrystallization, ...

example 2

[0035] 5%H 5 PMo 10 V 2 o 40 Preparation and catalytic performance of / SG catalyst

[0036] The preparation method is consistent with example 1, the difference is that H 4 PMo 11 VO 40 Change to H 5 PMo 10 V 2 o 40 .

[0037] 0.1 g of solid catalyst was weighed and applied to the liquid phase oxidation reaction of benzene, and the results are shown in Table 1.

example 3

[0039] 5%H 6 PMo 9 V 3 o 40 Preparation and catalytic performance of / SG catalyst

[0040] The preparation method is consistent with example 1, the difference is that H 4 PMo 11 VO 40 Change to H 6 PMo 9 V 3 o 40 .

[0041] 0.1 g of solid catalyst was weighed and applied to the liquid phase oxidation reaction of benzene, and the results are shown in Table 1.

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Abstract

The present invention relates to supported heteropoly compound catalyst and its preparation process and application in selective catalytic oxidation of arene, and is especially one kind of supported heteropoly Mo-V-P compound catalyst and its preparation process and application in the selective oxidizing synthesis of phenol with benzene under the action of hydrogen peroxide solution. The catalyst has the expression of m%M3+nPMo12-nVnO40 / SG, where m% is the weight percentage of M3+nPMo12-nVnO40 in the solid catalyst and has the range of 1-80 %, n=1-3, SG expresses silica as the solid product of hydrating n-acetyl silicate. The catalyst has not only high catalytic activity and high phenol selectivity, but also catalysis stability.

Description

Technical field [0001] The invention relates to a supported heteropoly compound catalyst and its preparation method and the application of the catalyst in the selective catalytic oxidation reaction of aromatic hydrocarbons, in particular to a supported molybdenum vanadium phosphorus heteropoly compound catalyst and its preparation method and the catalyst in hydrogen peroxide Under the action of catalyzing the selective oxidation of benzene to synthesize phenol. Background technique [0002] Phenol is an important organic chemical raw material, mainly used in the manufacture of phenolic resin, bisphenol A, epoxy resin, carbonate, o-cresol, 2,6-xylenol, phosphate (plasticizer) of phenol, surface active agent and aniline etc. At present, there are two main sources of phenol in the industry, one is extracted from coal tar or petroleum distillate; the other is chemical synthesis, including sulfonation method, Raschig-Hooker method, chlorobenzene water solution, toluene oxidatio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/186B01J37/00C07C37/60C07C39/04
CPCY02P20/52
Inventor 王军张富民
Owner NANJING TECH UNIV