Application of transition metallic composite oxide catalyst in catalytic oxidation of methylbenzene to synthesize benzyl benzoate

A composite oxide, benzyl benzoate technology, applied in physical/chemical process catalysts, preparation of organic compounds, preparation of carboxylic acid esters, etc., can solve the problems of high cost, many reaction by-products, harsh reaction conditions, etc. The effect of low cost, high selectivity and activity, and simple preparation process

Inactive Publication Date: 2019-08-02
NANJING INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The catalyst preparation process required by the above two patents is complex and costly, and most of the other synthesis methods have problems such as many reaction by-products, low product yield, and harsh reaction conditions.

Method used

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  • Application of transition metallic composite oxide catalyst in catalytic oxidation of methylbenzene to synthesize benzyl benzoate
  • Application of transition metallic composite oxide catalyst in catalytic oxidation of methylbenzene to synthesize benzyl benzoate
  • Application of transition metallic composite oxide catalyst in catalytic oxidation of methylbenzene to synthesize benzyl benzoate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Prepare the transition metal composite oxide catalyst, comprising the steps of:

[0031] 1) Take 20 mol of calcium hydroxide, 6 mol of chromium hydroxide, 3 mol of ammonium bromide and 3 mol of ammonium fluoride to make 10L of colloid;

[0032] 2) Put the obtained colloidal solution into the autoclave and stir for 24 hours, the temperature is controlled at 150 °C to obtain the required colloid, then add 1.0 g of chromium dichloride to the colloid, continue the reaction for 6 hours, and the temperature is controlled at 80 °C , and then filter or centrifugally dehydrate the obtained colloid, wash with water until neutral, and dry at 100°C for 12 hours;

[0033] 3) Place the resulting solid sample in NH 3 Calcined in a tube furnace for 6 hours with the temperature controlled at 400 °C to obtain the desired catalyst.

[0034] Utilize the prepared catalyst to catalyze the oxidation of toluene to synthesize benzyl benzoate, and the reaction conditions are gentle, comprising...

Embodiment 2

[0037] Prepare the transition metal composite oxide catalyst, comprising the steps of:

[0038] 1) Take 6 mol of barium hydroxide, 2 mol of ferric hydroxide, and another 1 mol of ammonium chloride and 1 mol of ammonium iodide to make 1.8 L of colloid;

[0039] 2) Put the obtained colloidal solution into an autoclave and stir for 36 hours. The temperature is controlled at 140°C to obtain the desired colloid. Then add 0.6 g of manganese acetate to the colloid and continue the reaction for 10 hours. The temperature is controlled at 100°C. Filter or centrifuge the obtained colloid, wash with water until neutral, and dry at 120°C for 24 hours;

[0040] 3) Place the resulting solid sample in H 2 Calcined in a tube furnace for 10 hours with the temperature controlled at 800 °C to obtain the desired catalyst.

[0041] Utilize the prepared catalyst to catalyze the oxidation of toluene to synthesize benzyl benzoate, and the reaction conditions are gentle, comprising the steps:

[004...

Embodiment 3

[0044] Prepare the transition metal composite oxide catalyst, comprising the steps of:

[0045] 1) Take 9 mol of barium hydroxide, 4.5 mol of aluminum hydroxide, and another 4.5 mol of ammonium fluoride to make 3L of colloid;

[0046] 2) Put the obtained colloidal solution into the autoclave and stir for 12 hours. The temperature is controlled at 80°C to obtain the desired colloid. Then add 0.19 g of vanadium dichloride to the colloid and continue the reaction for 4 hours. The temperature is controlled at 25°C. , and then filter or centrifugally dehydrate the obtained colloid, wash with water until neutral, and dry at 80°C for 6 hours;

[0047] 3) The obtained solid sample was calcined in a tube furnace with CO for 3 hours, and the temperature was controlled at 350 °C to obtain the desired catalyst.

[0048] Utilize the prepared catalyst to catalyze the oxidation of toluene to synthesize benzyl benzoate, and the reaction conditions are gentle, comprising the steps:

[0049] ...

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Abstract

The invention provides application of a transition metallic composite oxide catalyst in catalytic oxidation of methylbenzene to synthesize benzyl benzoate. The application is characterized in that thecatalyst adopts a metallic composite oxide as a carrier, a high-activity transition metallic salt is adopted as a catalytic oxidation activity center, a halide is adopted as a catalysis assisting activity center, and the halide is selected from one or two of halides containing elements of F, Cl, Br and I. The catalyst provided by the invention is of a good mesoporous structure at a high temperature, is capable of catalyzing methylbenzene to selectively oxidize and synthesize benzyl benzoate under a gentle reaction condition, has very high selectivity and activity in reactions, and has multiple advantages of being simple in preparation process, low in cost, free of environment pollution, easy to separate, good in repeatability, and the like.

Description

technical field [0001] The invention relates to the application of a transition metal composite oxide catalyst in catalyzing the oxidation of toluene to synthesize benzyl benzoate, which belongs to the technical field of chemical industry. Background technique [0002] Volatile organic compounds (VOCs) refer to organic compounds with a saturated vapor pressure greater than 133.32Pa at normal temperature and a boiling point below 50-260°C at normal pressure, or any organic solid or liquid that can volatilize at normal temperature and pressure. One of the exhaust gases mainly comes from petrochemical, paint production, metal coating, printing and other production fields. Volatilization into the atmosphere will not only pollute the environment, but also endanger human health. If VOCs are converted into chemical products or chemical intermediates, waste can be turned into treasure, which is of great significance to environmental protection and economic benefits. Toluene is one ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/138C07C67/00C07C67/08C07C69/78
CPCB01J27/138C07C67/00C07C67/08C07C69/78
Inventor 丁逸飞吴功德王晓丽金同发刘冬冬郭海晨孟心宇
Owner NANJING INST OF TECH
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