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A kind of production technology of dimethyl sulfone

A technology of dimethyl sulfone and production technology, applied in the field of production technology of dimethyl sulfone, can solve the problems of long reaction time and high temperature, and achieve the effects of shortened reaction time, long service life and improved production efficiency

Active Publication Date: 2017-11-07
YUEYANG PENGCHENG TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this method, no catalyst is used for the oxidation reaction. Although the reaction temperature is lower than that of the nitric acid method, the temperature is still high and the reaction time is too long.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The concrete steps of the production technique of producing dimethyl sulfone by dimethyl sulfoxide are as follows:

[0032] (1) Oxidation reaction: Mix dimethyl sulfoxide and hydrogen peroxide in proportion to form a mixed solution, fill the fixed bed reactor with 2,6-naphthalene dicarboxylic acid catalyst, and continuously inject the mixed solution at the entrance of the fixed bed through a metering pump , the mixed solution flows along the catalyst bed and reacts under the action of the catalyst, the reaction temperature is kept at 50°C, the mixed solution flows along the catalyst bed in the fixed bed, the residence time is 30min, and the reaction solution flows out continuously at the outlet of the fixed bed ; Wherein, the active ingredient weight ratio of dimethyl sulfoxide and hydrogen peroxide is 1:0.55, the concentration of hydrogen peroxide is 10%, and the pH value before the mixed solution is controlled to enter the fixed-bed reactor is 4; 2,6-naphthalene dicarb...

Embodiment 2

[0038] The concrete steps of the production technique of producing dimethyl sulfone by dimethyl sulfoxide are as follows:

[0039] (1) Oxidation reaction: dimethyl sulfoxide and hydrogen peroxide mix in proportion to form a mixed solution, fill the fixed bed reactor with 2,6-naphthalene dicarboxylic acid catalyst, continuously inject the mixed solution at the entrance of the fixed bed by a metering pump, The mixed solution flows along the catalyst bed and reacts under the action of the catalyst, the reaction temperature is kept at 40°C, the mixed solution flows along the catalyst bed in the fixed bed, the residence time is 20min, and the reaction solution flows out continuously at the outlet of the fixed bed; ; Wherein, the active ingredient weight ratio of dimethyl sulfoxide and hydrogen peroxide is 1:0.7, the concentration of hydrogen peroxide is 5%, and the pH value before the mixed solution is controlled to enter the fixed-bed reactor is 6; 2,6-naphthalene dicarboxylic acid...

Embodiment 3

[0045] The concrete steps of the production technique of producing dimethyl sulfone by dimethyl sulfoxide are as follows:

[0046] (1) Oxidation reaction: dimethyl sulfoxide and hydrogen peroxide mix in proportion to form a mixed solution, fill the fixed bed reactor with 2,6-naphthalene dicarboxylic acid catalyst, continuously inject the mixed solution at the entrance of the fixed bed by a metering pump, The mixed solution flows along the catalyst bed and reacts under the action of the catalyst, the reaction temperature is kept at 60°C, the mixed solution flows along the catalyst bed in the fixed bed, the residence time is 25min, and the reaction solution flows out continuously at the outlet of the fixed bed; Wherein, the effective component weight ratio of dimethyl sulfoxide and hydrogen peroxide is 1:0.4, the concentration of hydrogen peroxide is 15%, and the pH value of the mixed solution before entering the fixed-bed reactor is controlled to be 3; the particle size of 2,6-n...

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Abstract

The invention belongs to the technical field of chemical engineering, and concretely discloses a dimethyl sulfone production technology. The technology comprises the following steps: 1, carrying out an oxidation reaction: mixing dimethyl sulfoxide with hydrogen peroxide in proportion to form a mixed solution, filing a fixed bed reactor with a catalyst, continuously pumping the mixed solution to the inlet of the fixed bed, allowing the mixed liquid to flow along a catalyst bed layer and to react under the action of a catalyst, and allowing the mixed liquid to flow along the catalyst bed layer in the fixed bed and a reaction liquid to continuously flow out of the outlet of the fixed bed, wherein the catalyst is 2,6-naphthalic acid; 2, crystallizing; 3, carrying out solid-liquid separation; and 4, drying. Adoption of the 2,6-naphthalic acid as the catalyst greatly accelerates the reaction speed of the oxidation reaction. The technology using the novel catalyst reduces the energy consumption in the dimethyl sulfone production process, shortens the production period, improves the production efficiency and increases the economic benefit.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, and in particular relates to a production process of dimethyl sulfone. Background technique [0002] As an organic sulfide, dimethyl sulfone can enhance the ability of the human body to produce insulin and promote the metabolism of carbohydrates. It is a necessary substance for the synthesis of human collagen. Dimethyl sulfone can promote wound healing, and it can also play a role in the synthesis and activation of vitamin B, vitamin C, and biotin required for metabolism and nerve health. It is called "natural beautifying carbon substance". [0003] At present, the domestic industrial production of dimethyl sulfone is mainly obtained by oxidizing dimethyl sulfoxide with nitric acid. This method has problems such as high reaction temperature, high energy consumption, long process flow, and many by-products, and serious environmental pollution. In the prior art, the patent CN 1150164C di...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C315/02C07C315/06C07C317/04
CPCC07C315/02C07C315/06C07C317/04
Inventor 李鹏
Owner YUEYANG PENGCHENG TECH DEV
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