A kind of production technology of dimethyl sulfone

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

Active Publication Date: 2018-03-09
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

[0026] The concrete steps of the production technique of producing dimethyl sulfone by dimethyl sulfoxide are as follows:

[0027](1) Oxidation reaction: first 2,6-naphthalene dicarboxylic acid catalyst is added in the retort, then add dimethyl sulfoxide, under stirring, add hydrogen peroxide with the flow rate of 2.0L / min from head tank, control temperature of reaction is 50°C, closed and normal pressure reaction for 30 minutes, wherein the weight ratio of active ingredients of dimethyl sulfoxide and hydrogen peroxide is 1:0.55, the mass percentage of catalyst 2,6-naphthalene dicarboxylic acid and dimethyl sulfoxide is 5%, hydrogen peroxide The concentration of hydrogen peroxide is 35%, and the pH value of hydrogen peroxide is controlled at 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 / g.

[0028] (2) Separation of the solid catalyst: filter the reacted mixture i...

Embodiment 2

[0034] The concrete steps of the production technique of producing dimethyl sulfone by dimethyl sulfoxide are as follows:

[0035] (1) Oxidation reaction: first 2,6-naphthalene dicarboxylic acid catalyst is added in the retort, then add dimethyl sulfoxide, under stirring, add hydrogen peroxide with the flow rate of 1.5L / min from head tank, control temperature of reaction is 40°C, closed and normal pressure reaction for 20 minutes, wherein the weight ratio of active ingredients of dimethyl sulfoxide and hydrogen peroxide is 1:0.7, the mass percentage of catalyst 2,6-naphthalene dicarboxylic acid and dimethyl sulfoxide is 10%, hydrogen peroxide The concentration of hydrogen peroxide is 25%, and the pH value of hydrogen peroxide 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 area is greater than 260m 2 / g.

[0036] (2) Separation of the solid catalyst: filter the reacted mixtu...

Embodiment 3

[0042] The concrete steps of the production technique of producing dimethyl sulfone by dimethyl sulfoxide are as follows:

[0043] (1) Oxidation reaction: first 2,6-naphthalene dicarboxylic acid catalyst is added in the retort, then add dimethyl sulfoxide, under stirring, add hydrogen peroxide with the flow velocity of 3.0L / min from head tank, control temperature of reaction is 60°C, closed and normal pressure reaction for 25 minutes, wherein the weight ratio of active ingredients of dimethyl sulfoxide and hydrogen peroxide is 1:0.4, the mass percentage of catalyst 2,6-naphthalene dicarboxylic acid and dimethyl sulfoxide is 2%, hydrogen peroxide The concentration of hydrogen peroxide is 45%, and the pH value of hydrogen peroxide 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.

[0044] (2) Separation of the solid catalyst: filter the reacted mi...

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Abstract

The invention belongs to the technical field of chemical engineering, and particularly discloses a production process of dimethyl sulfone. The production process comprises the following steps that 1, an oxidation reaction is carried out, wherein dimethyl sulfoxide, an oxidizing agent and a catalyst are added into a reaction device, the reaction temperature is controlled, and dimethyl sulfone is generated through stirring reaction, wherein the catalyst is 2,6-naphthalic acid; 2, a solid catalyst is separated; 3, a dimethyl sulfone crystal is generated through crystallization; 4, solid-liquid separation is performed to obtain the dimethyl sulfone crystal; 5, drying is carried out. Due to the fact that the 2,6-naphthalic acid is adopted as the catalyst for preparing the dimethyl sulfone from dimethyl sulfoxide through oxidization, the oxidization reaction speed is greatly increased, and the high-purity dimethyl sulfone product with the purity of 99% or above can be obtained only by separating the solid catalyst, generating and separating the dimethyl sulfone crystal and then carrying out drying treatment in the follow-up treating process. By the adoption of the novel catalyst, production energy consumption of dimethyl sulfone can be lowered, the produciton period is shortened, production efficiency is improved, and economic benefits are 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): C07C315/02C07C315/06C07C317/04
CPCC07C315/02C07C315/06C07C317/04
Inventor 李鹏
Owner YUEYANG PENGCHENG TECH DEV
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