Thioether oxidation tower for producing dimethyl sulfoxide

Abstract

The invention discloses a thioether oxidation tower for producing dimethyl sulfoxide, for solving the problems of the existing oxidation tower that liquid level in the tower is not stable, safety is poor, the content of nitric oxide in tail gas is high, and the control difficulty is high. According to the technical scheme of the invention, the thioether oxidation tower comprises a tower body; the tower body is divided into a heating area, a reaction area, a sub-cooling area and a cooling area from bottom to top; each of the reaction area, the sub-cooling area and the cooling area is internally provided with a cooling water coil pipe and a cooling water jacket on the wall of the tower; the heating area is provided with an oxidation air inlet; the reaction area is provided with a thioether feeding point; a tail gas outlet is formed at the upper section of the cooling area; the sub-cooling area is provided with a sulfoxide outlet under the liquid level; the upper section of the sub-cooling area is provided with a compressed air inlet. The thioether oxidation tower is simple in structure, simple and convenient to operate, good in reliability and low in oxidizing temperature; in addition, the liquid level in the tower is stable, no gas-phase reaction is generated and the content of nitric oxide in the tail gas is low.

Description

technical field [0001] The invention relates to a reaction tower in the chemical industry, in particular to a sulfide oxidation tower for producing dimethyl sulfoxide. Background technique [0002] At present, the relatively mature production of dimethyl sulfoxide (referred to as sulfoxide) in the industry mainly uses hydrogen sulfide (or carbon disulfide) and methanol as raw materials to synthesize dimethyl sulfide (referred to as sulfide) under the action of a catalyst. Oxidation reaction with oxidizing gas (a mixture of oxygen and nitrogen oxide, nitrogen oxide is nitrogen dioxide or a mixture of nitrogen monoxide and nitrogen dioxide) to generate sulfoxide. [0003] The existing sulfide oxidation tower has the following problems: (1) the outlet of sulfoxide is arranged at the bottom of the tower, generally an inverted U-shaped pipe is arranged outside the tower, and the sulfoxide is exported through the bottom of the tower, and then passed through the inverted U-shaped p...

AI Technical Summary

Problems solved by technology

If the discharge pipe is blocked or the tower pressure fluctuates, the liquid level in the tower will be unstable (even empty tower); (2) the content of nitrogen monoxide in the tail gas is high, which makes the subsequent tail gas treatment process difficult; (3) the oxidation temperature is high and the temperature When it reaches above 75℃, it is easy to cause gas phase reaction, so the risk of explosion is high

(5) It is difficult to control the temperature of the reaction zone

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