Separation system and separation method for piperylene and dicyclopentadiene

A technology of dicyclopentadiene and piperylene, which is applied in distillation purification/separation, hydrocarbon production by addition of unsaturated hydrocarbons, organic chemistry, etc., can solve the problem that high-purity piperylene and dicyclopentadiene cannot be obtained. and other problems, to achieve the effect of small reflux, reducing load and saving steam

Active Publication Date: 2013-07-03
CHINA PETROCHEMICAL CORP +1
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  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

[0011] In order to solve the problem that high-purity piperylene and dicyclopentadiene cannot be obtained in the pri

Method used

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  • Separation system and separation method for piperylene and dicyclopentadiene
  • Separation system and separation method for piperylene and dicyclopentadiene

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Experimental program
Comparison scheme
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Embodiment

[0035] like figure 2 Shown, a separation system of piperylene and dicyclopentadiene.

[0036] Including: carbon five distillation tower 7, piperylene tower 9 and dicyclopentadiene tower 11,

[0037] A second dimerization reactor 8 is arranged between the carbon five steaming tower 7 and the piperylene tower 9; a double-ring feed flash tank 10 is arranged before the dicyclopentadiene tower 11;

[0038] The top of the carbon five steaming tower 7 is connected to the second dimerization reactor 8 and then connected to the middle part of the piperylene tower 9; the bottom of the carbon five steaming tower 7 is connected to the double ring feed flash tank 10, and the double ring feed flash tank 10 The top and bottom are respectively connected to the upper and lower parts of the dicyclopentadiene tower 11;

[0039] When separating,

[0040] (1) The carbon five cuts that come from the bottom of the pre-weight removal tower and the weight removal tower enter the middle part of the...

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PUM

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Abstract

The invention discloses a separation method and a separation system for piperylene and dicyclopentadiene. The system comprises a C5 boil-up tower, a piperylene tower and a dicyclopentadiene tower and is characterized in that a second dimerization reactor is arranged between the C5 boil-up tower and the piperylene tower and a double-ring feeding flash vaporization vessel is arranged before the dicyclopentadiene tower. The separation method comprises the following steps: (1) allowing a C5 fraction having undergone removal of light components to enter into the middle part of the C5 boil-up tower and a tower-top materiel flow to enter into the second dimerization reactor, delivering a reacted material to the piperylene tower, carrying out gas-phase side-draw at the lower part of the piperylene tower so as to recover a piperylene product and returning a material obtained at the bottom of the piperylene tower to a C5 removing tower as a feed; and (2) recovering a material from the bottom of the C5 boil-up tower, allowing the material to enter into the flash vaporization vessel, allowing material flows obtained at the top and the bottom of the flash vaporization vessel to respectively enter into the upper part and the lower part of the dicyclopentadiene tower and carrying out side-draw at the dicyclopentadiene tower to recover a dicyclopentadiene product. With the system and the method provided by the invention, the purity and the color of piperylene and dicyclopentadiene can be improved, and economic benefits of equipment are enhanced.

Description

technical field [0001] The invention relates to the field of petroleum cracking, in particular to a separation system and method for piperylene and dicyclopentadiene. Background technique [0002] In the process of producing ethylene from petroleum cracking, a considerable amount of C5 fraction is produced by-product, and the C5 fraction is rich in dienes such as isoprene, piperylene and cyclopentadiene. These diolefins are chemically active and are important chemical raw materials. Due to the differences in raw materials, cracking depth and separation degree of petroleum hydrocarbon cracking, the content of diolefins in the C5 fraction is different, but the total amount is between 40% and 60%. Therefore, the separation and utilization of C5 fractions has far-reaching significance for improving the economic benefits of ethylene plants and comprehensively utilizing petroleum resources. [0003] The cracked C5 fraction is composed of more than 20 components with similar boil...

Claims

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Application Information

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IPC IPC(8): C07C11/20C07C13/61C07C2/50C07C7/04
Inventor 利梅马立国王鑫泉肖雪军孙希瑾刘江峰
Owner CHINA PETROCHEMICAL CORP
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