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Method for oxidizing thioether

A technology for oxidizing thioether and thioether, which is applied in chemical instruments and methods, preparation of organic compounds, organic chemistry, etc., can solve the problem of limiting the application range of peroxide oxidation, increasing the production cost of dimethyl sulfoxide, and the price of oxidants advanced questions

Active Publication Date: 2020-08-04
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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Examples

Experimental program
Comparison scheme
Effect test

preparation Embodiment 1

[0063] The tetrabutyl titanate and the first solvent absolute ethanol were vigorously stirred for 10 min (the stirring speed was 800 rpm) to obtain the first solution. Vigorously stir glacial acetic acid, the second solvent water and absolute ethanol (stirring speed is 800 rpm), and then add hydrochloric acid to make the pH less than 3 to obtain the second solution. In a water bath at room temperature, under vigorous stirring at a stirring speed of 800 rpm, the first solution was added to the second solution at a rate of 3 mL / min to form a light yellow mixed solution, in which tetrabutyl titanate, the first solvent, The molar ratio of the second solvent to the acid is 1:10:5:1. Mix the third solution containing carbon dots with the above mixed solution at a weight ratio of 0.25:1, stir for 0.5h, transfer to a hydrothermal kettle, conduct a hydrothermal reaction at 80°C for 6h, collect the solid product and dry it at 105°C , calcined at 500°C to obtain CDs / TiO 2 Catalytic com...

preparation Embodiment 2

[0065] Composite materials were prepared according to the method of Preparation Example 1, except that during the synthesis process, the weight ratio of the third solution containing carbon dots to the mixed solution of the first solution and the second solution was 0.5:1, and CDs / TiO 2 Composite particle A2 with an average particle size of about 65 nm, a CDs content of 15% by weight, TiO 2 The content is 85% by weight.

preparation Embodiment 3

[0067] Composite materials were prepared according to the method of Preparation Example 1, except that during the synthesis process, the molar ratio of tetrabutyl titanate, first solvent, second solvent and acid was 1:60:30:10, and CDs / TiO 2 Composite particle A3 with an average particle size of about 1100 nm, a CDs content of 9% by weight, TiO 2 The content is 91% by weight.

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Abstract

The invention relates to a method for oxidizing thioether. The method comprises the step of making thioether in contact with peroxide for reaction in the presence of a catalyst, wherein the catalyst is a catalytic composite material containing carbon dots and titanium oxide. The catalytic composite material containing carbon dots and titanium oxide is used as the catalyst to catalyze the oxidationreaction of thioether, 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 ofperoxide 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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IPC IPC(8): C07C315/02C07C317/04C07C317/14B01J21/18
CPCC07C315/02B01J21/18B01J21/063B01J35/19C07C317/04C07C317/14
Inventor 史春风康振辉黄慧刘阳王肖赵娟蔺晓玲
Owner CHINA PETROLEUM & CHEM CORP
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