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Method of oxidizing thioether

A technology for oxidizing sulfide and sulfide, applied in chemical instruments and methods, preparation of organic compounds, organic chemistry, etc., can solve the problems of limiting the application scope of peroxide oxidation method, high price of oxidants, and large dosage.

Active Publication Date: 2020-10-13
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the peroxide oxidation method, the price of the oxidizing agent is high and the amount used is large, which increases the production cost of dimethyl sulfoxide and limits the application range of the peroxide oxidation method.

Method used

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  • Method of oxidizing thioether

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Experimental program
Comparison scheme
Effect test

preparation Embodiment 1

[0055] Add 500mL to the beaker and the resistivity is 15MΩ·cm -1 The ultrapure water, anode graphite rod (diameter 10mm length 30cm) and cathode graphite rod (diameter 10mm length 30cm) are placed in it, keep the distance between the anode graphite rod and cathode graphite rod at 10cm, anode graphite rod and direct current Connect the positive pole of the power supply and connect the cathode graphite rod to the negative pole of the direct current power supply, apply a voltage of 50V to carry out electrolysis for 8 days, and obtain the electrolyte solution after electrolysis. Mix the electrolyzed electrolyte solution with 30% by weight hydrogen peroxide at a weight ratio of 1:5, then conduct modification treatment at 80°C for 12 hours, and then freeze the modified material at -20°C, 50Pa After drying for 24 hours, the modified nano-carbon-based material C1 was obtained, the particle size of which was 8nm.

preparation Embodiment 2

[0057] Add 1500mL to the beaker and the resistivity is 15MΩ·cm -1 The ultrapure water, anode graphite rod (diameter 20mm length 30cm) and cathode graphite rod (diameter 20mm length 30cm) are placed in it, keep the distance between the anode graphite rod and cathode graphite rod at 5cm, anode graphite rod and DC Connect the positive pole of the power supply and connect the cathode graphite rod to the negative pole of the direct current power supply, apply a voltage of 100V to carry out electrolysis for 18 days, and obtain the electrolyte after electrolysis. Mix the electrolyzed electrolyte solution with 30% by weight hydrogen peroxide at a weight ratio of 1:80, and then perform modification treatment at 100°C for 18 hours, and then freeze the modified material at -20°C, 50Pa After drying for 24 hours, the modified nano-carbon-based material C2 was obtained, and its particle size was 23 nm.

preparation Embodiment 3

[0059] Add 500mL to the beaker and the resistivity is 15MΩ·cm -1 The ultrapure water, anode graphite rod (diameter 10mm length 30cm) and cathode graphite rod (diameter 10mm length 30cm) are placed in it, keep the distance between the anode graphite rod and cathode graphite rod at 10cm, anode graphite rod and direct current Connect the positive pole of the power supply and connect the cathode graphite rod to the negative pole of the direct current power supply, apply a voltage of 50V to carry out electrolysis for 12 days, and obtain the electrolyte solution after electrolysis. Mix the electrolyzed electrolyte solution with 30% by weight hydrogen peroxide at a weight ratio of 1:120, then conduct modification treatment at 120°C for 24 hours, and then freeze the modified material at -20°C, 50Pa After drying for 24 hours, the modified nano-carbon-based material C3 was obtained, the particle size of which was 5 nm.

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Abstract

The present disclosure relates to a method of oxidizing thioether, the method comprising contacting thioether with a peroxide in the presence of a catalyst to react, the catalyst containing a modifiednanocarbon-based material. The modified nano carbon-based material is used as the catalyst to catalyze the oxidation reaction of thioether, so that the thioether can be oxidized under mild conditions; the raw material conversion rate and the target product selectivity are high, meanwhile, the effective utilization rate of peroxide can be remarkably increased, and the production cost is reduced.

Description

technical field [0001] The present disclosure relates to a method of oxidizing thioethers. Background technique [0002] Carbon-based materials include carbon nanotubes, activated carbon, graphite, graphene, fullerenes, carbon nanofibers, nanodiamonds, and more. The scientific research on nano-carbon catalysis began in the 1990s. Studies have shown that the surface chemical properties of carbon nanomaterials (mainly carbon nanotubes and graphene) can be flexibly adjusted, and saturated and unsaturated functional groups containing heteroatoms such as oxygen and nitrogen can be modified on the surface to make them have certain properties. Acidic and alkaline properties and redox ability, so it can be directly used as a catalyst material. Researching and developing new catalytic materials related to fullerenes (carbon nanotubes) and broadening their application in petrochemical, fine chemical and other fields have far-reaching theoretical significance and huge potential appli...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C317/04C07C315/02B01J21/18B01J37/34B01J37/32
CPCC07C315/02B01J21/18B01J37/348B01J37/32B01J35/23C07C317/04
Inventor 史春风康振辉王肖刘阳黄慧蔺晓玲赵娟
Owner CHINA PETROLEUM & CHEM CORP
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