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Technological method and equipment for separating benzene and cyclohexane mixture

A process method and a mixture technology, which are applied in the field of separating benzene and cyclohexane mixtures, can solve the problems of poor feasibility, environmental pollution, and high difficulty in operation, and achieve the effects of reducing production investment, process energy consumption, and saving costs.

Active Publication Date: 2016-07-20
QINGDAO TECHNOLOGICAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a process and equipment for separating the mixture of benzene and cyclohexane, which solves the problem that the existing technology of separating the mixture of benzene and cyclohexane has pollution to the environment, poor feasibility and high difficulty in operation question

Method used

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  • Technological method and equipment for separating benzene and cyclohexane mixture
  • Technological method and equipment for separating benzene and cyclohexane mixture
  • Technological method and equipment for separating benzene and cyclohexane mixture

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specific Embodiment 1

[0062] Embodiments of the present invention provide a process for separating a mixture of benzene and cyclohexane, comprising:

[0063] adding extractant to the mixture of benzene and cyclohexane;

[0064] Separation obtains the mixture of hexanaphthene, benzene and extractant;

[0065] Separation of benzene and extractant mixture yields benzene.

specific Embodiment 2

[0066] Such as figure 1 As shown, the embodiment of the present invention provides a kind of process method for separating the mixture of benzene and cyclohexane, comprising:

[0067] Benzene and cyclohexane mixture separation step S101:

[0068] The benzene and cyclohexane mixture 103 enters from the middle and lower part of the extractive distillation tower 106, and the extractant feed 102 enters from the middle and upper part of the extractive distillation tower 106, and the extractant feed 102 is sulfolane;

[0069] Separation of benzene and cyclohexane is carried out inside the extractive distillation tower 106;

[0070] After the cyclohexane vapor at the top of the extractive distillation tower 106 enters the condenser 107 to condense, part of the liquid phase cyclohexane flows back into the tower, and part of the liquid phase cyclohexane is extracted as the cyclohexane product 104; the bottom of the extractive distillation tower 106 After the liquid-phase benzene and ...

specific Embodiment 3

[0086] Such as figure 2 As shown, the embodiment of the present invention provides a kind of equipment for separating benzene and hexanaphthene mixture, comprising:

[0087] Extractive distillation column 106, extraction agent recovery column 207, first reboiler 108, intermediate reboiler 210, first mixer 109, second mixer 213, cooler 211, separator 212, first condenser 107 , the second condenser 208, the second reboiler 209; wherein,

[0088] The first reboiler 108 is arranged between the bottom of the extractive distillation tower 106 and the middle part of the extractant recovery tower 207;

[0089] The first mixer 109 is connected with the middle and upper part of the extractive distillation column 106;

[0090] Intermediate reboiler 210 is connected with the middle and lower part of extractant recovery tower 207;

[0091] The second reboiler 209 is connected with the bottom of the extraction agent recovery tower 207;

[0092] Separator 212, the inlet port is connecte...

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Abstract

The invention provides a technological method and equipment for separating a benzene and cyclohexane mixture. The method comprises the steps that the benzene and cyclohexane mixture is separated, wherein sulfolane serves as an extracting agent, and benzene and cyclohexane are separated in an extracting and rectifying tower; a mixture of benzene and the extracting agent is separated, wherein benzene and the extracting agent are separated in an extracting agent recycling tower; the extracting agent is recycled, wherein extracting agent flow separated from benzene is subjected to separation, heat exchanging, cooling and other treatment measures, and then the extracting agent enters the extracting and rectifying tower to be recycled. According to the technological method and equipment for separating the benzene and cyclohexane mixture, the benzene and cyclohexane mixture is separated in the extracting and rectifying tower, the mixture of benzene and the extracting agent sulfolane is separated in the extracting agent recycling tower, and the waste heat of the extracting agent flow extracted out of the bottom of the extracting agent recycling tower is recycled, so that cost is saved compared with that of a conventional extracting and rectifying process under the premise that the same product recycling rate and purity are achieved.

Description

technical field [0001] The invention relates to the technical field of chemical industry, in particular to a process and equipment for separating a mixture of benzene and cyclohexane. Background technique [0002] Benzene is an important petrochemical basic raw material for the synthesis of styrene (polystyrene plastic and synthetic rubber), phenol (phenolic resin), cycloethane (nylon), aniline, maleic anhydride (polyester resin ), alkylbenzene (detergent) and chlorobenzene, etc.; benzene is also used in the production of pharmaceuticals, plastics, pesticides and dyes, and is also added to motor gasoline as a high-octane aromatic hydrocarbon; benzene is also a Organic solvents, but considering the toxicity of benzene, they have been gradually replaced by safer solvents in recent years. [0003] Cyclohexane is a volatile, flammable, non-corrosive, colorless liquid with a pungent odor, insoluble in water, and less toxic than benzene; as one of the very important organic chemi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C7/08C07C15/04C07C13/18
CPCC07C7/08C07C15/04C07C13/18
Inventor 刘立新朱敏燕李鲁闽陈斌华刘桂丽
Owner QINGDAO TECHNOLOGICAL UNIVERSITY