Production method and apparatus of dimethyl disulfide

A technology for the production of dimethyl disulfide, which is applied in the field of preparation of dimethyl disulfide, can solve the problems of low investment costs, and achieve the effects of low consumption, stable production process, and reduced labor intensity
CN105085338AActive Publication Date: 2015-11-25CHENGDU DEMEI ENG TECH
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Patent Information

Authority / Receiving Office
CN Β· China
Current Assignee / Owner
CHENGDU DEMEI ENG TECH
Publication Date
2015-11-25

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Abstract

The invention relates to the technical field of preparation of dimethyl disulfide and provides a production method of dimethyl disulfide. The production method includes the steps of A, using sodium hydroxide solution containing catalyst to absorb a methyl mercaptan mixture so as to obtain mixed solution containing sodium thiomethoxide; B, mixing oxygen or oxygen-rich air with the alkaline solution obtained in the step A, allowing reaction to generate dimethyl disulfide, dimethyl sulfide and sodium hydroxide; and C, separating the oxygen or oxygen-rich air surplus in the reaction to generate dimethyl sulfide so as to obtain dimethyl disulfide liquid. The production method has low cost, high yield and low pollution. A production apparatus of dimethyl disulfide is further provided; the production apparatus comprises an absorption column, a heater, an oxidization column, a flash separator tank and a recovery system connected in order through a pipeline, wherein the heater is used for heating the alkaline solution to a set temperature, the oxidization column is used for generating dimethyl disulfide, the flash separator tank is used for separating materials, and the recovery system is used for recovering the alkaline solution. The production apparatus is automatically controllable, thus labor is saved, reutilization of the alkaline solution is achieved and production cost is lowered.
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Description

technical field

[0001] The invention relates to the technical field of preparation of dimethyl disulfide, in particular to a production method and device of dimethyl disulfide. Background technique

[0002] Dimethyl disulfide is an important chemical product with a wide range of uses. It is mainly used as an intermediate for the preparation of pesticides and insecticides; in the petroleum industry, it can be used as an anti-corrosion and coking agent for ethane cracking furnaces, oil Vulcanizing agent for product hydrofining catalyst, inhibitor of hydrocracking in benzene nuclei dehydroxylation reaction; in rubber industry, it can be used as solvent, regeneration agent, softener and plasticizer; in addition, dimethyl disulfide is also It can be used as fuel, lubricating additive and inhibitor of some organic chemical reactions.

[0003] At present, there are four production methods of dimethyl disulfide: dimethyl sulfate method, methyl mercaptan oxidation method, methanol v...

Claims

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