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Modified cobalt oxide catalyst and application thereof to selective oxidation of styrene

A technology of cobalt oxide and catalyst, applied in the field of modified cobalt oxide catalyst, can solve the problems of many by-products, increased system processing steps, complicated catalyst preparation, etc., and achieves low by-product, high selectivity, and simple product separation and post-processing. Effect

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

The preparation of the catalyst in this patent is relatively cumbersome, and the follow-up involves the liquid-solid separation of the catalyst and the reaction system, the system processing steps increase, and there are many by-products

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Weigh 0.4g of cobalt nitrate, dissolve it in 4g of deionized water, impregnate it on 0.8g of SBA-15 silica carrier after the dissolution is complete, let it stand for 12h, and dry it under vacuum at 50°C, then put the dried catalyst Calcined at 500°C for 8 hours to obtain a cobalt oxide catalyst; then weigh 0.4g of magnesium nitrate, dissolve it in 4g of deionized water, impregnate it on the cobalt oxide catalyst after the dissolution is complete, let it stand for 12 hours, and then dry it in vacuum at 60°C , and then calcined the dried catalyst at 500° C. for 8 h to obtain a modified cobalt oxide catalyst.

[0024] The application of the modified cobalt oxide catalyst in the selective oxidation of styrene: add 0.05 g of the modified cobalt oxide catalyst and 15 g of styrene into a 100 ml 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 introduce...

Embodiment 2

[0026] Weigh 0.4g of cobalt nitrate, dissolve it in 4g of deionized water, impregnate it on 0.8g of SBA-15 silica carrier after the dissolution is complete, let it stand for 12h, and dry it under vacuum at 70°C, then dry the dried catalyst Roast at 500°C for 8 hours to obtain a cobalt oxide catalyst; then weigh 0.2g of calcium chloride, dissolve it in 4g of deionized water, impregnate it on the cobalt oxide catalyst after the dissolution is complete, and let it stand for 12 hours, vacuum at 50°C drying, and then calcining the dried catalyst at 600° C. for 8 hours to obtain a modified cobalt oxide catalyst.

[0027] The application of the modified cobalt oxide catalyst in the selective oxidation of styrene: add 0.05 g of the modified cobalt oxide catalyst and 15 g of styrene into a 100 ml 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 t...

Embodiment 3

[0029] Weigh 0.4g of cobalt nitrate, dissolve it in 4g of deionized water, impregnate it on 0.8g of SBA-15 silica carrier after the dissolution is complete, let it stand for 12h, and dry it under vacuum at 80°C, then put the dried catalyst Calcined at 500°C for 8h to obtain a cobalt oxide catalyst; then weigh 0.1g of cesium nitrate, dissolve it in 4g of deionized water, impregnate it on the cobalt oxide catalyst after the dissolution is complete, let it stand for 12h, and dry it under vacuum at 80°C , and then calcined the dried catalyst at 450° C. for 8 h to obtain a modified cobalt oxide catalyst.

[0030] The application of the modified cobalt oxide catalyst in the selective oxidation of styrene: add 0.05 g of the modified cobalt oxide catalyst and 15 g of styrene into a 100 ml 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 temperat...

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Abstract

The invention relates to a modified cobalt oxide catalyst for selective oxidation of styrene. The catalyst is prepared by the following method: dissolving a cobalt salt in deionized water, then addinga silicon dioxide carrier for impregnation, carrying out standing for 8-24 hours, carrying out drying and roasting to obtain a cobalt oxide catalyst, dissolving a modified metal salt in deionized water, then adding the cobalt oxide catalyst for impregnation, carrying out standing for 8-24 hours, and carrying out drying and roasting to obtain the modified cobalt oxide catalyst. In the modified cobalt oxide catalyst, the mass content of cobalt is 0.1-30%, and the mass content of the modified metal is 0.1-30%. The catalyst is simple in preparation, is cheap and is easy to obtain. When the catalyst is applied to selective oxidation of styrene, oxygen can be used as an oxidizing agent, and solvents are not required, so that the catalyst is safe and environmentally friendly, and the product iseasy to separate.

Description

technical field [0001] The invention relates to a modified cobalt oxide 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 light 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 the industry. It has a wide range of uses. It is mainly used in the production of lauric acid, lauric aldehyde and magenta. It is also the most basic raw material for benzyl alcohol, aniline, benzophenone and insecticides. The most basic raw material for pharmaceutical products and plastic additives. Because benzaldehyde has unique sweetness, aroma and almond smell, it is also an important intermediate in the synthesis of flavors and fragrances. Styrene oxide can be us...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/035C07C45/36C07C47/54C07D303/04C07D301/06
CPCB01J29/0356B01J2229/18C07C45/36C07D301/06C07D303/04C07C47/54
Inventor 徐骏
Owner SINOPEC YANGZI PETROCHEM
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