Method for preparing carbon disulfide with hydrogen sulfide as raw material

Abstract

The invention discloses a method for preparing carbon disulfide with hydrogen sulfide as a raw material. The method includes the steps that mixed gas of natural gas and hydrogen sulfide reacts under the action of a novel catalyst, and carbon disulfide and hydrogen are generated; the generated mixed product with carbon dioxide, hydrogen and natural gas as main components, which contains a small amount of hydrogen sulfide, passes through a rectifying tower I, and carbon disulfide is condensed and separated; the separated mixed product with hydrogen, natural gas and hydrogen sulfide as main components is pressurized and enters a rectifying tower II for pressure rectification, and hydrogen is separated out from the top of the rectifying tower in the form of gas; unreacted natural gas and a small amount of non-completely-reacted hydrogen sulfide are recycled through a delivery pump to serve as raw materials again, and a circulating production process is realized. The raw materials in the preparation method are wide in source and low in price; besides, the reaction efficiency is high, less environmental pollution is caused, no industrial waste gas is discharged, the energy consumption islow, the economic benefit is good, and continuous safe production can be realized.

Description

technical field [0001] The invention belongs to the field of chemical technology, and in particular relates to a method for preparing carbon disulfide by using hydrogen sulfide as a raw material. 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 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., can also be used as a vulcanizing agent for cobalt-molybdenum conversion catalysts; as a solvent, it is mainly used for viscose fiber, Synthesis of cellophane and production of insoluble sulfur, grease, wax, resin and rubber; carbon disulfide can also be used to make pesticides, insecticides and grain fumigants. [0003] With the rapid develop...

AI Technical Summary

Problems solved by technology

Compared with the charcoal method, the reaction of using natural gas and sulfur-containing compounds to prepare carbon disulfide has been studied at home and abroad. In the patent US4078045, natural gas and sulfur are used as catalysts to prepare CS at high temperature. 2 A detailed report has been made, but there is a problem that the conversion rate of the product is not high during the preparation process, and the conversion rate will decrease with the growth of the catalyst use time. At the same time, the reaction of carbonyl sulfide disproportionation to generate carbon disulfide and carbon dioxide is reversible. It is difficult to proceed positively under the condition

Therefore, novel methods must be employed to bypass this expensive and inefficient limitation

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