Device and method for simultaneously producing ultra-high-purity carbon oxysulfide and high-purity carbon disulfide

Abstract

The invention belongs to a device and a method for simultaneously producing ultra-high-purity carbon oxysulfide and high-purity carbon disulfide. The device comprises a carbon monoxide raw material gas pipeline provided with a first regulating valve, a sulphur raw material pipeline, a carbon disulfide product tank and a carbon oxysulfide product tank, wherein the carbon monoxide raw material gas pipeline and the sulphur raw material pipeline are respectively connected with a first raw material inlet and a second raw material inlet of a reactor; an outlet of the reactor is connected with a buffer tank; a gas outlet formed in the top of the buffer tank is connected with an entrance of a first rectifying tower, a liquid phase outlet of the first rectifying tower is connected with an entranceof a third rectifying tower, and a liquid phase outlet of the third rectifying tower is connected with the carbon disulfide product tank; a gas phase outlet of the first rectifying tower is connectedwith a raw material inlet of a second rectifying tower, and a liquid phase outlet of the second rectifying tower is connected with the carbon oxysulfide product tank; the device and the method have the advantages that a three-tower type complex distillation process is used for extracting the carbon oxysulfide with the purity of not lower than 99.999%, and the purity of the carbon disulfide is improved to 99.99%.

Description

technical field [0001] The invention belongs to the technical field of carbon oxysulfide and carbon disulfide, in particular to a device and method for simultaneously producing ultra-high-purity carbon oxysulfide and high-purity carbon disulfide. Background technique [0002] Carbon oxysulfide is a colorless, flammable, toxic gas with an unpleasant smell similar to rotten eggs. Its boiling point is -50.15°C. Carbon oxysulfide is an important synthetic raw material in the pharmaceutical and pesticide industries. It is especially useful in the synthesis of the following products: thioacids, tertiary alcohols, substituted thiazoles, and substituted thiocarbamic acids. When used in the synthesis of substituted thiazoles, high yields can be obtained. [0003] At ambient conditions, carbon disulfide is a colorless to yellow liquid. Its boiling point is 46.22°C. It is used in the production of viscose and cellophane. It can also be used as a flotation agent and solvent. [0004...

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Problems solved by technology

And adopt the above-mentioned traditional carbon oxysulfide production process because raw material gas is impure and technology is not advanced, can occur a lot of side reactions such as in the synthetic process: H 2 +S=H 2 S; H 2 O+COS=CO 2 +H 2 S et al., in the follow-up COS purification process, it is necessary to adopt the combined purification process of condensation-adsorption-low temperature rectification, and deep purification of water is also required. The process is very complicated, and the quality of COS can only reach the standard gas production Requirements for COS (99.9%)

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