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Method for avoiding forming hydrogen sulfide hydrate in carbon bisulfide production process

A carbon disulfide, production process technology, applied in the direction of carbon disulfide, carbon-sulfur compounds, etc., can solve the problems of many water leakage points, time-consuming and laborious search, etc.

Active Publication Date: 2014-09-03
吉林三源化工有限公司
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  • Abstract
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Problems solved by technology

However, there are many water leakage points, and it takes time and effort to find them. Therefore, preventing water from entering the hydrogen sulfide distillation tower can fundamentally solve the formation of hydrogen sulfide hydrate

Method used

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  • Method for avoiding forming hydrogen sulfide hydrate in carbon bisulfide production process
  • Method for avoiding forming hydrogen sulfide hydrate in carbon bisulfide production process
  • Method for avoiding forming hydrogen sulfide hydrate in carbon bisulfide production process

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Embodiment Construction

[0033] refer to figure 2 and 3 As shown, the product obtained from the reaction of natural gas with methane and ethane as the main components and sulfur after passing through the condenser A206 enters the flash tank A408 together with the bottom product of the uncondensed product entering the desulfurization tower A402 , for the separation of carbon disulfide and sulfur. The tank top product is a mixed gas of carbon disulfide and a small amount of hydrogen sulfide. The mixed gas enters the flash carbon disulfide condenser H404, and all the gas is cooled to liquid and enters the water separation device A403N. If there is water leaking into the device, the carbon disulfide Layered with water, the water layer is in the upper part, because the density of water is lower than that of carbon disulfide, so the liquid level displayed by the liquid level switch 5 increases, and the liquid level switch will automatically alarm when it reaches the set value. The valve discharges the wat...

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Abstract

The invention belongs to the technical field of inorganic chemical industry, and relates to a method for avoiding forming hydrogen sulfide hydrate in a methane-process carbon bisulfide production process, which comprises the following steps: a sulfur-natural gas reaction mixture is subjected to primary condensation and desulfurizing tower desulfurization; the primary condensation product and desulfurizing tower bottom distillate together enter a flash tank; the flash-off carbon bisulfide gas is condensed and separated from water; the carbon bisulfide subjected to water separation is pumped back into the desulfurizing tower; and the desulfurizing tower overhead product enters a hydrogen sulfide rectification tower to implement separation of carbon bisulfide and hydrogen sulfide. The method solves the problem that water often exists in the hydrogen sulfide rectification tower and hydrogen sulfide outlet pipeline and forms the hydrogen sulfide hydrate, and provides insurance for safe operation of the carbon bisulfide device. The method is also suitable for solving the problem of some compounds which can easily form hydrocarbon hydrates with water.

Description

Background technique [0001] At present, the method widely used in China to produce carbon disulfide is the methane method, and its main process is: use natural gas with methane as the main component to react with sulfur to synthesize carbon disulfide, and the specific reaction equation is [0002] CH 4 +4S===CS 2 +2H 2 S [0003] In addition to carbon disulfide and hydrogen sulfide, the reaction product contains unreacted methane, sulfur and other impurities, which are separated and refined to obtain carbon disulfide. [0004] The existing production technology all adopts cooling primary separation and distillation to separate and purify the reaction mixture. First, excess sulfur is removed by condensation; then, carbon disulfide and hydrogen sulfide are separated by rectification to obtain carbon disulfide and hydrogen sulfide with satisfactory purity. [0005] During the separation and purification process of hydrogen sulfide and carbon disulfide, it was found that the ...

Claims

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Application Information

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IPC IPC(8): C01B31/26C01B32/75
Inventor 李刚
Owner 吉林三源化工有限公司
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