Production process of sulfoxide chloride

Abstract

The invention belongs to the technical field of chemical production, and in particular relates to a production process of sulfoxide chloride. The production process comprises the following steps: enabling synthetic gas generated by reaction of sulfur and chlorine gas in a synthesis kettle, and sulfur dioxide gas to enter a reactor together; directly de-coloring a crude product sulfoxide chloride, generated by reaction in the reactor, through a sulfur tank in a gas-state form, and then conveying the crude product into a decomposer; enabling a gas-phase crude product sulfoxide chloride from the decomposer to enter a rectifying tower; after condensing a gas phase at the top of the rectifying tower, enabling the gas phase to enter a refluxing tank; after enabling the gas phase in the refluxing tank to enter an evacuation tank through an injector, recycling the gas phase back into the synthesis kettle, and taking out a qualified product from the middle part of the rectifying tower. The production of the sulfoxide chloride is fully sealed circulating production, and no wastewater, waste gas and waste dreg are discharged; the yield of the product basically reaches 100 percent.

Description

technical field [0001] The invention belongs to the technical field of chemical production, and in particular relates to a production process of thionyl chloride. Background technique [0002] ZL95110380.6 discloses a manufacturing method of thionyl chloride, the method is to put the crude thionyl chloride obtained by cooling the thionyl chloride prepared by catalytic synthesis into the distillation still with sulfur powder added in advance, Distillation to obtain liquid thionyl chloride product. [0003] According to literature, in the preparation process of thionyl chloride, the crude thionyl chloride synthesized by the reactor is condensed and then subjected to batch rectification or rectification of two-stage rectification tower / three-stage rectification tower. [0004] During the preparation of thionyl chloride, the crude sulfur oxychloride in the gas phase from the reactor is condensed and sulfur mixed, and then the liquid phase is rectified, while the gas phase is re...

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Problems solved by technology

[0004] During the preparation of thionyl chloride, the crude sulfur oxychloride in the gas phase from the reactor is condensed and sulfur mixed, and then the liquid phase is rectified, while the gas phase is recycled back to the reaction system; at the same time, the tail gas generated in the rectification process is condensed and then recycled to the reaction system. Reaction system, but it cannot condense all the tail gas, resulting in a certain material loss. The tail gas that has not been cooled needs to be emptied after water absorption and alkali absorption treatment. The process is relatively complicated and causes material loss; at the same time, too many condensers are used. The safety performance of the device is greatly reduced; the crude thionyl chloride is condensed and then gasified to cause a certain amount of steam consumption, and corresponding power equipment needs to be equipped with high energy consumption; if the gaseous crude thionyl chloride from the reactor directly enters The rectification tower increases the production load of the rectification tower; the finished product of thionyl chloride contains 0.3%-0.5% sulfuryl chloride

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