A kind of method of producing dimethyl sulfoxide and acetone simultaneously

A technology of dimethyl sulfoxide and dimethyl sulfide, which is applied in chemical instruments and methods, preparation of carbon-based compounds, preparation of organic compounds, etc., can solve environmental pollution, low conversion rate of dimethyl sulfide, and reduced The effective treatment capacity of the device can achieve the effect of high dimethyl sulfoxide selectivity, high dimethyl sulfide conversion rate, and environmental protection.

Active Publication Date: 2018-03-20
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The disadvantages of the nitric acid oxidation method are that the reaction is not easy to control, the equipment is severely corroded, and the environment is polluted.
Ozone oxidation method has the problem of low conversion rate of dimethyl sulfide
Anodizing is not suitable for large-scale implementation
Nitrogen dioxide oxidation law has the problem of environmental pollution
But, as the most commonly used oxidant in the peroxide oxidation method, hydrogen peroxide is usually provided in the form of hydrogen peroxide, and its commercial concentration is generally between 20-50% by weight, so a large amount of water will inevitably be introduced in the reaction system, reducing The effective processing capacity of the device
In the actual operation process, hydrogen peroxide (hydrogen peroxide) is generally used and produced on the spot, so the production equipment using hydrogen peroxide (hydrogen peroxide) as the oxidant is generally equipped with a hydrogen peroxide (hydrogen peroxide) production unit, which increases the construction cost of the device and running costs
In addition, hydrogen peroxide may decompose during the reaction process, thus reducing the effective utilization rate of hydrogen peroxide and further increasing the operating cost of the device

Method used

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  • A kind of method of producing dimethyl sulfoxide and acetone simultaneously
  • A kind of method of producing dimethyl sulfoxide and acetone simultaneously
  • A kind of method of producing dimethyl sulfoxide and acetone simultaneously

Examples

Experimental program
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Effect test

Embodiment 1

[0065] In the tank reactor, under an oxygen atmosphere (an atmosphere formed by oxygen with a purity of 99%), dimethyl sulfide and isopropanol are contacted with the original powder of titanium silicon molecular sieve TS-1 as a catalyst, wherein , the molar ratio of dimethyl sulfide to isopropanol is 1:4, the weight ratio of dimethyl sulfide to catalyst is 20:1, the temperature is 90°C, the pressure is 2.5MPa (gauge pressure), the oxygen partial pressure is 1.5MPa. After reacting for 2 hours, the resulting mixture was filtered, and the resulting liquid mixture was collected and analyzed by gas chromatography, thereby obtaining the conversion rate of dimethyl sulfide, the conversion rate of isopropanol, the selectivity of dimethyl sulfoxide and the selectivity of acetone , and the results are listed in Table 1.

Embodiment 2

[0067] Dimethyl sulfide was oxidized by the same method as in Example 1, except that a hollow titanium-silicon molecular sieve of equal mass was used instead of titanium-silicon molecular sieve TS-1, and the temperature was 60°C. The experimental results are listed in Table 1.

Embodiment 3

[0069] Dimethyl sulfide was oxidized by the same method as in Example 1, except that the reaction temperature was 120°C. The experimental results are listed in Table 1.

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Abstract

The invention discloses a method for simultaneously producing dimethyl sulfoxide and acetone. The method comprises contacting dimethyl sulfide and isopropanol with titanium silicon molecular sieves in the presence of oxygen to obtain dimethyl sulfoxide and acetone. A mixture of acetone. By adopting the method of the invention, a higher conversion rate of dimethyl sulfide and a higher selectivity of dimethyl sulfoxide can be obtained, and acetone can also be by-produced at the same time. The raw materials used in the method of the invention are environment-friendly, produce less environmental pollutants, and are more conducive to environmental protection. According to the method of the invention, no solvent can be used, and various raw materials can be used directly without being formulated into solutions, and the effective processing capacity of the device will not be reduced. The method of the invention has a simple process flow, is easy to operate, and is suitable for large-scale implementation.

Description

technical field [0001] The present invention relates to a method for simultaneously producing dimethyl sulfoxide and acetone. Background technique [0002] Dimethyl sulfoxide (DMSO) is a sulfur-containing organic compound. It is a colorless and transparent liquid at room temperature. It has the characteristics of high polarity, high hygroscopicity, flammability, and high boiling point aprotic. Dimethyl sulfoxide is soluble in water, ethanol, acetone, ether and chloroform, is a highly polar inert solvent, widely used as a solvent and reaction reagent, for example, as a processing solvent and spinning solvent in acrylonitrile polymerization, as Polyurethane synthesis solvent and spinning solvent, as a synthesis solvent of polyamide, fluorochloroaniline, polyimide and polysulfone. Moreover, dimethyl sulfoxide has high selective extraction ability and can be used as an extraction solvent for the separation of alkanes and aromatic hydrocarbons. For example, dimethyl sulfoxide ca...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C317/04C07C315/02C07C49/08C07C45/39
Inventor 史春风林民朱斌
Owner CHINA PETROLEUM & CHEM CORP
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