Production of dimethyl sulfide by hydrogen sulfide - methanol process and carbon disulfide - methanol process

Production of dimethyl sulfide by hydrogen sulfide - methanol process and carbon disulfide - methanol process

1.概述

Dimethyl sulfide is the simplest sulfide, a sulfur analogue of methyl ether。Dimethyl sulfide is allowed to use edible spices, mainly used to prepare corn, tomato, potato, dairy, pineapple and orange fruit flavor and green flavor flavor。At the same time, dimethyl sulfide can be used as a solvent, and is an intermediate in the production of dimethyl sulfoxide, methionine and pesticides。It can be used as a solvent for organic synthesis, polymerization and cyanidation。Used as an analytical agent, polyacrylonitrile and other synthetic fibers for spinning and hydraulic oils。It can also be used as city gas deodorant, industrial purifier, coating defilm agent, battery low temperature preservative, pesticide penetrant and so on。

2.Market demand and forecast

Dimethyl sulfide can be used as a solvent, and can also be used as a solvent for organic synthesis, polymerization and cyanidation reactions。With the wide application, its production capacity and output are also growing rapidly, and the market prospect of dimethyl sulfide is very good。

3.Production scheme

3.1 Production process overview

目前，The main methods of producing dimethyl sulfide at home and abroad are as follows: dimethyl sulfate reacts with sodium sulfide at 80-90℃ to produce dimethyl sulfide;Methanol and carbon disulfide react at 300℃ and catalyzed by aluminum hydroxide to produce dimethyl sulfide.Hydrogen sulfide-methanol process，At high temperature，The activated alumina was dehydrated to produce dimethyl ether.Dimethyl sulfide is formed by the reaction of dimethyl ether with hydrogen sulfide under the action of catalyst。

3.2. Selection of process scheme

Hydrogen sulfide - methanol process: at high temperature, activated alumina as catalyst dehydration to produce dimethyl ether;Dimethyl sulfide is formed by the reaction of dimethyl ether with hydrogen sulfide under the action of catalyst. The production process is the proprietary technology of our institute。

Carbon disulfide - methanol process: dimethyl sulfide is produced by reaction at 300℃ under aluminum hydroxide catalyst. The production process is the proprietary technology of our institute。

3.3 Main raw materials and consumption quota

Main raw materials and consumption quota