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Bimetallic catalyst and application thereof to selective oxidation of styrene

A bimetallic catalyst, styrene technology, applied in molecular sieve catalysts, physical/chemical process catalysts, preparation of organic compounds, etc., can solve the problems of insufficient safety and environmental protection, difficult post-processing of the reaction system, etc., and achieve high selectivity and product separation. and simple post-processing, simple to prepare effects

Inactive Publication Date: 2018-08-14
SINOPEC YANGZI PETROCHEM +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Most of the above methods use solvents to participate in the reaction, which brings difficulties to the post-treatment of the reaction system. Some oxidants also use peroxides, which are not safe and environmentally friendly.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Weigh 0.12g of lithium chloride and 0.05g of ammonium metavanadate, dissolve them in 2g of deionized water, impregnate them on 0.2g of SBA-15 silica carrier after the dissolution is complete, let it stand for 12h, and vacuum at 50°C After drying, the dried catalyst was calcined at 500° C. for 8 hours to obtain a bimetallic catalyst.

[0027] The application of the bimetallic catalyst in the selective oxidation of styrene: add 0.05g of the bimetallic catalyst and 15g of styrene into a 100ml three-necked flask, and insert a thermometer, an oxygen bubbling tube and a water-cooled condenser in the flask. Under the condition of good stirring, 100ml / min of oxygen was introduced, the temperature of the system was raised to 70°C, and the reaction was carried out at constant temperature for 5h. After the reaction, the reaction system was subjected to qualitative and quantitative analysis by gas chromatography. The conversion rate of styrene is 63.1%, the selectivity of benzalde...

Embodiment 2

[0029] Weigh 0.04g of potassium chloride and 0.05g of ammonium metavanadate, dissolve them in 2g of deionized water, impregnate them on 0.2g of MCM-41 silica carrier after the dissolution is complete, let stand for 12h, and vacuum at 50°C After drying, the dried catalyst was calcined at 500° C. for 8 hours to obtain a bimetallic catalyst.

[0030] The application of the bimetallic catalyst in the selective oxidation of styrene: add 0.05g of the bimetallic catalyst and 15g of styrene into a 100ml three-necked flask, and insert a thermometer, an oxygen bubbling tube and a water-cooled condenser in the flask. Under the condition of good stirring, 100ml / min of oxygen was introduced, the temperature of the system was raised to 70°C, and the reaction was carried out at constant temperature for 5h. After the reaction, the reaction system was subjected to qualitative and quantitative analysis by gas chromatography. The conversion rate of styrene was 56.2%, the selectivity of benzalde...

Embodiment 3

[0032] Weigh 0.03g of cesium chloride and 0.05g of ammonium metavanadate, dissolve them in 2g of deionized water, impregnate them on 0.2g of SBA-15 silica carrier after the dissolution is complete, let it stand for 12h, and vacuum at 50°C After drying, the dried catalyst was calcined at 500° C. for 8 hours to obtain a bimetallic catalyst.

[0033] The application of the bimetallic catalyst in the selective oxidation of styrene: add 0.05g of the bimetallic catalyst and 15g of styrene into a 100ml three-necked flask, and insert a thermometer, an oxygen bubbling tube and a water-cooled condenser in the flask. Under the condition of good stirring, 100ml / min of oxygen was introduced, the temperature of the system was raised to 70°C, and the reaction was carried out at constant temperature for 5h. After the reaction, the reaction system was subjected to qualitative and quantitative analysis by gas chromatography. The conversion rate of styrene is 23.1%, the selectivity of benzaldeh...

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PUM

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Abstract

The present invention relates to a bimetallic catalyst for selective oxidation of styrene. The bimetallic catalyst is prepared by the following method: dissolving an alkali metal salt and a vanadium salt in deionized water, adding a silica carrier for impregnation, carrying out standing for 8-24 hours, and then carrying out drying and roasting to obtain the catalyst. When the bimetallic catalyst is used in selective oxidation of styrene, oxygen or air is used as an oxidizing agent and is introduced into a reaction system through bubbling, and under the action of the bimetallic catalyst, a catalytic oxidation reaction is carried out on styrene and dissolved oxygen. The catalyst in the method is simple to prepare, is cheap, and is easy to obtain. When the bimetallic catalyst is applied to the selective oxidation of styrene, the oxidizing agent is oxygen, safety and environment friendliness are achieved, the one-way conversion rate of the styrene is high, the selectivity of the product benzaldehyde and styrene oxide is high, solvents are not required, and the separation problem caused by the solvents is avoided.

Description

technical field [0001] The invention relates to a bimetallic catalyst and belongs to the technical field of olefin selective oxidation. Background technique [0002] The catalytic oxidation of styrene can produce benzaldehyde and styrene oxide. Benzaldehyde, commonly known as bitter almond oil, is a colorless or slightly yellow transparent liquid with the smell of bitter almonds. It is used as a fragrance in food, cosmetics, medicine and soap. Benzaldehyde is the most important aromatic aldehyde in industry. It has a wide range of uses, mainly It is used in the production of lauric acid, lauric aldehyde and magenta, etc. It is also the most basic raw material for benzyl alcohol, aniline, benzophenone and insecticides. It is the most basic raw material for the synthesis of certain pharmaceutical products and plastic additives. An important intermediate. Styrene oxide can be used as a diluent, UV-absorber, and flavor enhancer for epoxy resins, and is also an important interm...

Claims

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Application Information

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IPC IPC(8): B01J29/03B01J29/04C07C45/36C07C47/54C07D301/06C07D303/04
CPCB01J29/03B01J29/0341B01J29/045B01J2229/186C07C45/36C07D301/06C07D303/04C07C47/54
Inventor 徐骏
Owner SINOPEC YANGZI PETROCHEM
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