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Method for preparing organic lactone by catalyzing and oxidizing organic ketone with carbon materials

A technology for catalytic oxidation and organic ketones, applied in organic chemistry, the formation/introduction of carboxylate groups, etc., can solve the problems of difficult recycling of catalysts, low catalyst activity and selectivity, and low efficiency, and achieve good industrial application prospects , The reaction process is mild and easy to control, and the effect of simple preparation

Inactive Publication Date: 2014-08-06
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these methods generally do not use a catalyst, and the efficiency is very low; even if some use a catalyst, the activity and selectivity of the catalyst are very low, and the catalyst is difficult to recycle, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] 0.5 grams of graphene catalyst, 10 grams of cyclopentanone, 10 grams of benzaldehyde and 200 milliliters of 1,2-dichloroethane in the three-necked glass bottle successively, feed oxygen, and the flow rate of oxygen is 100 milliliters / minute, under stirring in After reacting at 40° C. for 3 hours, gas chromatography-mass spectrometry analysis results showed that the product was the target product valerolactone, and gas chromatography analysis results showed that the selectivity and yield of valerolactone were 100% and 98.4%, respectively. After the catalyst was recycled 10 times, the selectivity and yield of valerolactone were still 100% and 98.2%, respectively.

Embodiment 2

[0023] Add 0.2 grams of commercial multi-walled carbon nanotube catalyst, 10 grams of cyclohexanone, 20 grams of butyraldehyde and 200 milliliters of 1,2-dichloroethane in turn into a three-necked glass bottle, and feed oxygen at a flow rate of 200 milliliters / minute , after reacting at 80° C. under stirring for 1 hour, gas chromatography-mass spectrometry analysis results showed that the product was the target product caprolactone, and gas chromatography analysis results showed that the selectivity and yield of caprolactone were 100% and 100% respectively. 98.7%.

Embodiment 3

[0025] Add 0.8 grams of commercial activated carbon catalyst, 10 grams of 2-methylcyclohexanone, 40 grams of p-chlorobenzaldehyde and 200 milliliters of acetonitrile in the three-necked glass bottle successively, feed oxygen, and the oxygen flow rate is 400 milliliters / minute, under stirring in After reacting at 30 DEG C for 9 hours, gas chromatography-mass spectrometry analysis results showed that the product was the target product 2-methylcaprolactone, and gas chromatography analysis results showed that the selectivity and yield of 2-methylcaprolactone were both 99.5%.

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PUM

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Abstract

The invention provides a method for preparing organic lactone. The method is characterized in that carbon materials are used as catalyst, the carbon materials may be graphite, graphene, carbon nano tube, active carbon and so on; organic ketone is used as substrate, oxygen or air is used as oxygen source, organic aldehydes materials are used as reductant, and organic solvent is added into reaction system. The method has the following advantages: the preparation for the catalyst is simple; the reaction condition is mild, secure, credible and environmental friendly; the selectivity and the yield of the obtained target products are about 100%; and the catalyst can be used repeatedly. The method solves the problem that the traditional preparation technology for lactone has poor security and low yield, and has good industrial application prospect.

Description

【Technical field】 [0001] The invention relates to the field of industrial catalysis in the petrochemical industry, in particular to a catalytic method for preparing organic lactones by oxidation of organic ketones. 【Background technique】 [0002] Organic lactone is an important organic synthesis intermediate, mainly used in the synthesis of polyester and copolymerization or blending modification with other esters, for example, polyε-caprolactone (PCL) is derived from ε-caprolactone (CL ) Linear aliphatic polyester obtained by ring-opening polymerization. Lactone can also be used as a strong solvent to dissolve many polymer resins, and has good solubility for some insoluble resins. For example, caprolactone can dissolve chlorinated polyolefin resins and "ESTANE" polyurethane resins. [0003] So far, the synthesis of organic lactones has problems in raw material quality, production safety and product stability, and the synthesis technology is difficult. Currently, only a few ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07B41/12C07D309/30C07D313/04
Inventor 尹双凤李岳芳陈浪
Owner HUNAN UNIV
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