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Method for oxidizing thiophene sulfides

A technology for sulfide and catalytic oxidation, applied in chemical instruments and methods, chemical/physical processes, physical/chemical process catalysts, etc., to achieve good overall selectivity, mild reaction conditions, and simple production processes

Active Publication Date: 2013-04-03
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, although existing H 2 o 2 / Titanium-silicon molecular sieve catalyzes the oxidation system of thiophene sulfide, which can reach a certain H 2 o 2 The conversion rate and sulfoxide or sulfone yield (relative to H 2 o 2 ), but there is still room for improvement

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0042] Thiophene, hydrogen peroxide, solvent and catalyst (TS-1 and phosphotungstic heteropolyacid H 3 PW 12 o 40 The mass ratio of thiophene and hydrogen peroxide is 1: 1) according to the molar ratio of thiophene and hydrogen peroxide is 1: 2, the mass ratio of solvent methanol and catalyst is 20: 1, the mass ratio of thiophene and catalyst is 20: 1, at a temperature of 50 ° C and a pressure The reaction was carried out at 1.5MPa. The results of the 2-hour reaction were as follows: the conversion rate of thiophene was 44%; the total selectivity of sulfoxide and sulfone was 92%.

Embodiment 2

[0044] 2-chlorothiophene, hydrogen peroxide, solvent and catalyst (TS-1 and molybdenum tungsten heteropoly blue H 5 MoW 12 o 40 The mass ratio is 0.1: 1) according to the mol ratio of sulfide and hydrogen peroxide is 1: 4, the mass ratio of solvent methanol and catalyst is 120: 1, the mass ratio of sulfide and catalyst is 40: 1, at temperature The reaction was carried out at 50° C. under a pressure of 1.0 MPa. The result of reaction for 2 hours is as follows: the conversion rate of thiophene sulfide is 62%; the total selectivity of sulfoxide and sulfone is 93%.

Embodiment 3

[0046] With 2-methylthiophene, hydrogen peroxide, solvent acetone and catalyst (TS-1 and homovanadic acid H 4 V 2 o 7 The mass ratio of thiophene and hydrogen peroxide is 50: 1) according to the molar ratio of thiophene and hydrogen peroxide is 1: 5, the mass ratio of solvent acetone and catalyst is 200: 1, the mass ratio of thiophene and catalyst is 80: 1, at a temperature of 60 ° C The reaction was carried out at a pressure of 1.0 MPa. The result of reaction for 2 hours is as follows: the conversion rate of thiophene sulfide is 67%; the total selectivity of sulfoxide and sulfone is 94%.

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Abstract

The invention discloses a method for catalytically oxidizing thiophene sulfides. The method comprises the step of contacting thiophene sulfides, hydrogen peroxide and a catalyst under the condition of oxidation reaction. The method is characterized in that the catalyst contains multi-metal oxyacid and / or multi-metal oxysalt and titanium silicalite molecular sieves. The method is environment-friendly, is simple in production process and is beneficial to industrial production and application.

Description

technical field [0001] The invention relates to a method for catalytically oxidizing thiophene sulfides. Background technique [0002] With the increasingly stringent requirements for environmental protection around the world, the quality requirements for vehicle fuels in various countries are also becoming increasingly stringent. In recent years, with the rapid increase in the number of motor vehicles, motor vehicle exhaust has become the main source of urban air pollution, and the key to reducing pollutant emissions is to reduce the sulfur content of petroleum products (especially gasoline and diesel). Sulfur in fuel oil mainly exists in the form of thiophene sulfides. [0003] Thiophene sulfides can be oxidized to sulfones or sulfoxides, based on which the oxidative desulfurization technology is formed. Compared with the traditional hydrodesulfurization process, it can better remove thiophene and its alkyl substitutes, benzothiophene Sulfides are more easily oxidized to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D333/48C07D333/54C07D333/72C07D333/76B01J29/89
Inventor 林民史春风朱斌汝迎春
Owner CHINA PETROLEUM & CHEM CORP
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