Method for preparing carbon disulfide from carbon oxygen compound as raw materai

Abstract

The invention relates to a method for simply preparing CS2 from a carbon oxygen compound as a raw material. The method has the advantages that firstly, by adjusting raw materials, industrial waste gases such as hydrogen sulfide and carbon monoxide are relatively efficiently utilized, the yield of COS is remarkably increased at a relatively low temperature, CO can be completely converted, and the yield of CSs is increased; secondly, after a mixed gas of COS, H2, CO2 and CS2 generated form a first reaction tower is condensed and distilled, a COS pure gas obtained through separation is fed into acarbonyl sulfide disproportionation tower for further catalytic decomposition, and thus the yield of CS2 is increased; thirdly, CO2, COS and CS2 are separated in a mode of pressurized rectification,the separation efficiency and the operability of conversion products with CO2, COS and CS2 are remarkably improved. By adopting the method, continuous circulation of the whole production process is achieved, the conversion rate of carbonyl sulfide is greatly increased, the yield of CS2 is remarkably increased, and the whole process is free of reaction waste emission.

Description

technical field [0001] The invention relates to a simple preparation of CS by using carbon oxides as raw materials. 2 Methods. Background technique [0002] Carbon disulfide is an important inorganic chemical raw material with a wide range of uses. At present, it is mainly used as a solvent and as a raw material for the synthesis of some fine chemical products. As a solvent, it is mainly used in the synthesis of viscose fiber and cellophane and in the production of insoluble sulfur, grease, wax, resin and rubber. As a chemical raw material, it is used to synthesize dimethyl sulfide, carbon tetrachloride, dimethyl sulfoxide, dimethyl sulfone, rubber vulcanization accelerator M, D, xanthate mineral flotation agent, etc., and can also be used As a vulcanizing agent for cobalt-molybdenum conversion catalysts, etc. Carbon disulfide can also be used to make pesticides, insecticides and grain fumigants. [0003] At present, sulfur and charcoal, natural gas, propylene, etc. are ...

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Problems solved by technology

[0006] In order to solve the existing problems such as the low conversion rate of sulfur in the preparation of carbonyl sulfide, serious production of industrial waste gas hydrogen sulfide, low conversion rate of disproportionation process of carbonyl sulfide, relatively low separation efficiency of carbonyl sulfide and carbon dioxide, etc., the present invention provides A method for preparing carbon disulfide from carbon oxides

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