A kind of production technology of dimethyl sulfone

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

Active Publication Date: 2017-07-21
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

[0030] The concrete steps of the production technique of producing dimethyl sulfone by dimethyl sulfoxide are as follows:

[0031] (1) Oxidation reaction: dimethyl sulfoxide and hydrogen peroxide are mixed to form a mixed solution, and the mixed solution is injected into a fixed-bed reactor filled with 2,6-naphthalene dicarboxylic acid catalyst by a metering pump for reaction, and the reaction temperature is kept At 50°C, the mixed liquid flows along the catalyst bed in the fixed bed, the residence time is 30min, and the reaction liquid is collected at the outlet of the fixed bed; wherein, the active ingredient weight ratio of dimethyl sulfoxide and hydrogen peroxide is 1:0.55, and the hydrogen peroxide The concentration is 10%, and the pH value before the mixed solution enters the fixed-bed reactor is controlled to be 4; the particle size of 2,6-naphthalene dicarboxylic acid is 1.2-1.8mm, the porosity is greater than 25%, and the specific surface area is greater than 260m 2 / ...

Embodiment 2

[0037] The concrete steps of the production technique of producing dimethyl sulfone by dimethyl sulfoxide are as follows:

[0038] (1) Oxidation reaction: dimethyl sulfoxide and hydrogen peroxide are mixed to form a mixed solution, and the mixed solution is injected into a fixed-bed reactor filled with 2,6-naphthalene dicarboxylic acid catalyst by a metering pump for reaction, and 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 is collected at the outlet of the fixed bed; wherein, the effective component weight ratio of dimethyl sulfoxide and hydrogen peroxide is 1:0.7, and the ratio of hydrogen peroxide is 1:0.7. The concentration is 5%, and the pH value of the mixed solution before entering the fixed-bed reactor is controlled to be 6; the particle size of 2,6-naphthalene dicarboxylic acid is 1.2-1.8mm, the porosity is greater than 25%, and the specific surface ar...

Embodiment 3

[0044] The concrete steps of the production technique of producing dimethyl sulfone by dimethyl sulfoxide are as follows:

[0045] (1) Oxidation reaction: dimethyl sulfoxide and hydrogen peroxide are mixed to form a mixed solution, and the mixed solution is injected into a fixed-bed reactor filled with 2,6-naphthalene dicarboxylic acid catalyst by a metering pump for reaction, and the reaction temperature is kept At 60°C, the mixed liquid flows along the catalyst bed in the fixed bed, the residence time is 25min, and the reaction liquid is collected at the outlet of the fixed bed; wherein, the active ingredient weight ratio of dimethyl sulfoxide and hydrogen peroxide is 1:0.4, and the hydrogen peroxide The concentration is 15%, and the pH value before the mixed solution enters the fixed-bed reactor is controlled to be 3; the particle size of 2,6-naphthalene dicarboxylic acid is 1.2-1.8mm, the porosity is greater than 25%, and the specific surface area is greater than 260m 2 / g...

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Abstract

The invention belongs to the technical field of chemical engineering, and particularly discloses a production technology of dimethyl sulfone. The production technology comprises the following steps of oxidation reaction, crystallization, solid-liquid separation and drying, wherein in the oxidation reaction step, dimethyl sulfoxide and hydrogen peroxide are mixed into a mixed solution according to a proportion, the mixed solution is injected into a fixed bed reactor filled with a 2,6-naphthalic acid catalyst for a reaction, the reaction temperature is kept at 20 DEG C to 120 DEG C, the mixed solution flows in the fixed bed along a catalyst bed layer, and a reaction solution is collected at a fixed bed outlet. According to the production technology of dimethyl sulfone, 2,6-naphthalic acid serves as the catalyst, the reaction speed of the oxidation reaction is greatly increased, only crystals of dimethyl sulfone need to be formed and separated in the posttreatment process, and then the high-purity dimethyl sulfone product with the purity of 99% or above can be obtained after drying treatment is conducted. The novel catalyst is used, the production energy consumption of dimethyl sulfone can be reduced, the production cycle can be shortened, the production efficiency can be improved, and the economic benefit can be increased.

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): C07C315/02C07C317/04C07C315/06
CPCC07C315/02C07C315/06C07C317/04
Inventor 李鹏
Owner YUEYANG PENGCHENG TECH DEV
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