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Method for catalytically oxidizing acetophenone

A technology for catalytic oxidation and acetophenone, applied in chemical instruments and methods, molecular sieve catalysts, preparation of organic compounds, etc., to achieve the effects of environmental friendliness, easy control, and mild reaction conditions

Active Publication Date: 2015-03-18
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There are also reports on the oxidation of acetophenone using titanium silicate molecular sieves as catalysts [Baeyer-Villiger rearrangement catalysed by titanium silicate molecular sieve (TS-1) / H 2 o 2 system, Catalysis Letters, Volume 40, Numbers1-2, 47-50], but there is still room for improvement in the conversion rate of acetophenone and the selectivity of phenyl acetate

Method used

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  • Method for catalytically oxidizing acetophenone

Examples

Experimental program
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Effect test

Embodiment 1

[0040] With acetophenone, hydrogen peroxide, solvent and catalyst (TS-1 and phosphotungstic heteropolyacid H 3 PW 12 o 40 The mass ratio is 10: 1) according to the mol ratio of acetophenone and hydrogen peroxide is 1: 2, the mass ratio of solvent methanol and catalyst is 20: 1, the mass ratio of acetophenone and catalyst is 20: 1, at temperature The reaction was carried out at 80° C. under a pressure of 0.5 MPa. The results of the reaction for 2 hours were as follows: the conversion rate of acetophenone was 25%; the selectivity of phenyl acetate was 46%.

Embodiment 2

[0042] Acetophenone, hydrogen peroxide, solvent and catalyst (TS-1 and molybdenum tungsten heteropoly blue H 5 MoW 12 o 40 The mass ratio is 0.1: 1) according to the mol ratio of acetophenone and hydrogen peroxide is 1: 4, the mass ratio of solvent methanol and catalyst is 120: 1, the mass ratio of acetophenone and catalyst is 40: 1, in The reaction was carried out at a temperature of 50°C and a pressure of 1.0 MPa. The results of the reaction for 2 hours were as follows: the conversion rate of acetophenone was 35%; the selectivity of phenyl acetate was 49%.

Embodiment 3

[0044] Acetophenone, hydrogen peroxide, solvent and catalyst (TS-1 and homovanadic acid H 4 V 2 o 7 The mass ratio is 50: 1) according to the mol ratio of acetophenone and hydrogen peroxide is 1: 5, the mass ratio of solvent acetone and catalyst is 200: 1, the mass ratio of acetophenone and catalyst is 80: 1, in The temperature is 60° C. and the pressure is 1.0 MPa to carry out the reaction. The results of the reaction for 2 hours were as follows: the conversion rate of acetophenone was 76%; the selectivity of phenyl acetate was 62%.

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Abstract

The invention discloses a method for catalytically oxidizing acetophenone. The method comprises the step of contacting acetophenone, hydrogen peroxide and a catalyst. The method is characterized in that the catalyst contains titanium silicalite molecular sieves and multi-metal oxyacid and / or multi-metal oxysalt. The method is environment-friendly, is simple in production process and is beneficial to industrial production and application.

Description

technical field [0001] The invention relates to a method for catalytic oxidation of acetophenone. Background technique [0002] Phenyl acetate is a colorless liquid with a boiling point of 195.7°C, a relative density of 1.0780 (20 / 4°C), a refractive index of 1.5033 and a flash point of 76°C. Miscible with ethanol, ether, chloroform and acetic acid, slightly soluble in water. A strong refraction, phenol smell. It is mainly used as a solvent and an intermediate in organic synthesis. Phenyl acetate can also be used to obtain oxyacetophenone through transposition reaction, which can be used to treat acute and chronic icteric hepatitis, cholecystitis and other diseases. [0003] At present, the industrial production of phenyl acetate is mainly obtained by the reaction of sodium phenate and acetic anhydride. One operation method is to add phenol into sodium hydroxide solution, stir and dissolve to prepare sodium phenoxide solution, add acetic anhydride, and react at 30-40°C. T...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C69/157C07C67/42B01J31/38B01J29/89
Inventor 林民史春风朱斌汝迎春
Owner CHINA PETROLEUM & CHEM CORP
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