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Sulfocompound selective catalytic oxidation reaction system in aqueous phase

A reaction system, catalytic oxidation technology, used in the preparation of organic compounds, organic compound/hydride/coordination complex catalysts, physical/chemical process catalysts, etc.

Inactive Publication Date: 2016-09-21
NANYANG NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Oxidation of sulfur-containing compounds to sulfones or sulfoxides in aqueous phase under mild conditions remains a challenge for synthetic chemistry at present.

Method used

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  • Sulfocompound selective catalytic oxidation reaction system in aqueous phase
  • Sulfocompound selective catalytic oxidation reaction system in aqueous phase
  • Sulfocompound selective catalytic oxidation reaction system in aqueous phase

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A selective catalytic oxidation reaction system for sulfur-containing compounds in the water phase of the present invention is synthesized by the following method:

[0025] Stir 5 μmol of catalyst, 2 mmol of sulfide anisole, and 6 mmol of 30% hydrogen peroxide in 4 mL of water at room temperature for 1.5 hours, the conversion rate reaches 99%, and the selectivity of the product sulfone reaches 96%. After the reaction is finished, it is extracted with ethyl acetate, and after the organic phase is separated, the catalyst is dispersed in the water phase and can be directly used for the next catalytic reaction. Catalytic activity is maintained, and both conversion and selectivity are maintained.

[0026]

[0027] Stir 1.2 μmol of catalyst, 2 mmol of sulfide anisole, and 2 mmol of 30% hydrogen peroxide in 3 mL of water at room temperature for 6 hours, the conversion rate reaches 93%, and the selectivity of the product sulfone reaches 91%. After the reaction is finished, ...

Embodiment 2

[0030] A selective catalytic oxidation reaction system for sulfur-containing compounds in the water phase of the present invention is synthesized by the following method:

[0031] Stir 5 μmol of catalyst, 2 mmol of diethyl sulfide, and 6 mmol of 30% hydrogen peroxide in 4 mL of water at room temperature for 1.5 hours, the conversion rate reaches 98%, and the selectivity of the product sulfone reaches 99%. After the reaction is finished, it is extracted with ethyl acetate, and after the organic phase is separated, the catalyst is dispersed in the water phase and can be directly used for the next catalytic reaction. Catalytic activity is maintained, and both conversion and selectivity are maintained.

[0032]

[0033] Stir 1.2 μmol of catalyst, 2 mmol of sulfide anisole, and 2 mmol of 30% hydrogen peroxide in 3 mL of water at room temperature for 6 hours, the conversion rate reaches 94%, and the selectivity of the product sulfone reaches 90%. After the reaction is finished, ...

Embodiment 3

[0036] A selective catalytic oxidation reaction system for sulfur-containing compounds in the water phase of the present invention is synthesized by the following method:

[0037] Stir 5 μmol of catalyst, 2 mmol of ethyl propyl sulfide, and 6 mmol of 30% hydrogen peroxide in 4 mL of water at room temperature for 2 hours, the conversion rate reaches 99%, and the selectivity of the product sulfone reaches 99%. After the reaction is finished, it is extracted with ethyl acetate, and after the organic phase is separated, the catalyst is dispersed in the water phase and can be directly used for the next catalytic reaction. Catalytic activity is maintained, and both conversion and selectivity are maintained.

[0038]

[0039] Stir 1.2 μmol of catalyst, 2 mmol of ethyl propyl sulfide, and 2 mmol of 30% hydrogen peroxide in 3 mL of water at room temperature for 6 hours, the conversion rate reaches 91%, and the selectivity of the product sulfone reaches 83%. After the reaction is fi...

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Abstract

The invention provides a sulfocompound selective catalytic oxidation reaction system in an aqueous phase. A catalyst, a sulfocompound and 30% hydrogen peroxide are stirred for 1.5-2 hours under room temperature in the aqueous phase according to the molar ratio of the catalyst to the sulfocompound to the 30% hydrogen peroxide being 1 to 400 to 1200, wherein the conversion rate is greater than 97%, and the selectivity of the product namely sulphone is greater than 94%; the catalyst, the sulfocompound and the 30% hydrogen peroxide are stirred for 6 hours under the room temperature in the aqueous phase according to the molar ratio of the catalyst to the sulfocompound to the 30% hydrogen peroxide being 1 to 1666 to 1666, wherein the conversion rate is greater than 90%, and the selectivity of the product namely sulphoxide is greater than 80%. According to the reaction system disclosed by the invention, after the reaction is completed, extraction is performed with ethyl acetate, after an organic phase is separated, the catalyst dispersed in the aqueous phase can be directly used for the next catalytic reaction, and the catalytic activity, the conversion rate and the selectivity are all kept. The sulfocompound selective catalytic oxidation reaction system disclosed by the invention has the advantages that water is used as a solvent, the reaction condition is mild, the catalytic activity is high, the selectivity of products is good, the consumption of the catalyst is low, and the catalyst can be repeatedly used.

Description

technical field [0001] The invention relates to chemical catalytic oxidation reaction, in particular to a selective catalytic oxidation reaction system for sulfur compounds in water phase. Background technique [0002] Oxidation of sulfur-containing compounds to sulfones or sulfoxides is a very important class of organic reactions. The oxidation products sulfone and sulfoxide are widely used in industrial production, pharmaceutical synthesis and biological science. [1] . In addition, compared with the classic hydrodesulfurization reaction, oxidative desulfurization is more and more widely used and researched in desulfurization production because of its high desulfurization efficiency, good product selectivity, and convenient operation. [2] . [0003] On the other hand, polyoxometalates, as a class of inorganic oxygen cluster compounds with special structure and excellent performance, are widely used in structural chemistry, material science, food chemistry, supramolecular...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07B45/04C07C315/02C07C317/14C07C317/04C07C317/22B01J31/36
CPCB01J31/0271B01J31/36C07B45/04C07C315/02C07C317/14C07C317/04C07C317/22
Inventor 赵伟杨春霞
Owner NANYANG NORMAL UNIV
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