Verfahren zur Herstellung von Dimethylsulfoxid

摘要

In a process for producing dimethyl sulfoxide (DMSO), dimethyl sulfoxide (DMS) is continuously oxidized by a gas mainly composed of oxygen using NOx as a catalyst in a liquid phase. The process comprises the optional step of using the oxygen gas obtained by the pressure swing adsorption treatment of air, as the gas mainly composed of oxygen, and the step of supplying at least partially the DMSO and NOx of the reaction product solution, obtained by the oxidation reaction, as a reaction solution to the oxidation reaction for recycling.