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Coarse carbon bisulfide rectifying equipment and method

A carbon disulfide and rectification technology, which is applied in the field of rectification, can solve the problems of unstable quality of carbon disulfide products, difficult control of hydrogen sulfide and sulfur content, and easy formation of hydrates, so as to avoid product waste, avoid environmental pollution, and achieve good separation effect. Effect

Active Publication Date: 2007-03-28
SHANGHAI BAIJIN CHEM GROUP
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Problems solved by technology

[0003] In order to solve the problems that the content of hydrogen sulfide and sulfur is not easy to control in the existing carbon disulfide preparation process, the quality of the obtained carbon disulfide product is also unstable, and hydrogen sulfide is easily formed when it encounters a trace amount of water after liquefaction, etc. The present invention provides a crude carbon disulfide preparation Distillation equipment and methods

Method used

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  • Coarse carbon bisulfide rectifying equipment and method
  • Coarse carbon bisulfide rectifying equipment and method

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Embodiment Construction

[0015] The rectification equipment for crude carbon disulfide includes a crude stripping tower 1, a fine stripping tower 2 and a finished product tower 3. The rough stripping tower 1 is connected to a sulfur condenser through a gas-liquid mixing pipe 5 and then connected to the reactor. The top of the rough stripping tower 1 passes through Pipeline 6 is connected with condensers 7, 8, and 9 in turn, and liquid carbon disulfide output branch pipes 10 are respectively connected under condensers 7, 8, and 9. Liquid carbon disulfide output branch pipes 10 are connected with mixer 11, and mixer 11 is connected with redistribution through pipeline 12. Connect with device 13, the middle part of coarse stripping tower 1 is connected with the carbon disulfide output pipe 14 that communicates with redistributor 13, and the subdivider 13 below is connected with fine stripping tower 2 by pipeline 15, and fine stripping tower 2 tower tops pass pipeline 16 successively with Condensers 17 and...

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Abstract

The invention relates to the rectifying technical field, concretely a coarse CS2 rectifying device and method, where the gas-liquid mixture of S, methane, sulfureted hydrogen and CS2 coming from a reactor and condensed by S condenser are rectified by rough removing tower, fine removing tower and finished product tower, i.e. three-tower continuous rectification. And it adopts a three-tower continuous rectifying mode, making the sulfureted hydrogen concentration reach 99.0-99.95%; after rectification, it pressurizes the uncondensed gas to continue condensation to recover CS2, and then feeds the recoverd CS2 into a Claus tail gas recovering system, avoiding environmental pollution and product waste caused by high-altitude exhaust of the uncondensed gas (or exhaust after burnt).

Description

technical field [0001] The invention relates to the technical field of rectification, in particular to a rectification equipment and method for crude carbon disulfide. Background technique [0002] The production of carbon disulfide by using natural gas and sulfur as raw materials has been widely adopted. The specific reaction forms can be various, such as high-pressure catalytic form, low-pressure non-catalytic form, etc. In the actual production process, in order to completely convert natural gas In any form of reaction, an excess of sulfur beyond the theoretical requirement is often added to the ratio of raw materials. The mixture produced by the reaction includes unreacted sulfur, natural gas, and carbon disulfide and hydrogen sulfide produced by the reaction. The content of hydrogen sulfide is about 40-48%, the content of sulfur is about 3-10%, and the content of methane is about 0.5-3%. However, these impurities cannot be removed by simple distillation methods. In ord...

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Application Information

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IPC IPC(8): C01B31/26
Inventor 孔庆然
Owner SHANGHAI BAIJIN CHEM GROUP
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