Sodium methyl mercaptide and dimethyl disulfide joint production system and process

Abstract

The invention relates to the field of chemical product manufacturing, in particular to a sodium methyl mercaptide and dimethyl disulfide joint production system which comprises a methyl mercaptan feeding tank and a methyl mercaptan vaporizer, the outlet end of the methyl mercaptan feeding tank is communicated with the inlet end of the methyl mercaptan vaporizer, the outlet end of the methyl mercaptan vaporizer is communicated with the inlet end of a sodium methyl mercaptide reaction tower, and the outlet end of the sodium methyl mercaptide reaction tower is communicated with the outlet end of a dimethyl disulfide reaction tower. The outlet end of the sodium methyl mercaptide reaction tower is communicated with the inlet end of the oxidation reactor, the inlet end of the top of the sodium methyl mercaptide reaction tower is further communicated with an alkali liquor supply device, the inlet end of the oxidation reactor is further communicated with an oxygen buffer tank, and the outlet end of the oxidation reactor is communicated with a light component removal unit; the invention also relates to a joint production process of sodium methyl mercaptide and dimethyl disulfide. The method has the advantages that one set of equipment can jointly produce two products, the yield is high, the equipment utilization rate is high, the production cost is low, no side reaction is ensured, the safety is high, and the raw material conversion rate is high.

Description

technical field [0001] The invention relates to the technical field of chemical product manufacturing, in particular to a combined production system and process of sodium methyl mercaptide and dimethyl disulfide. Background technique [0002] At present, there are many methods for synthesizing dimethyl disulfide (DMDS), mainly including dimethyl sulfate method, methyl mercaptan oxidation method, methyl mercaptan sulfur method, methyl mercaptan hydrogen sulfide sulfur method and methyl mercaptan sodium hydrogen peroxide method . [0003] 1. Dimethyl sulfate method: use sodium sulfide and sulfur as raw materials to prepare sodium disulfide, and then react the newly prepared sodium disulfide with dimethyl sulfate to prepare dimethyl disulfide. The dimethyl sulfate method is mature in technology, but the raw material dimethyl sulfate is highly toxic, causes serious environmental pollution, and has a high consumption quota of raw materials, which is gradually eliminated. [000...

AI Technical Summary

Problems solved by technology

And to solve the current mainstream production of sodium methyl mercaptide or dimethyl disulfide, the raw materials are highly toxic, the environment is polluted seriously, the safety control is difficult, and continuous joint production cannot be carried out.

Images