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Method for separating and cracking cyclopentadienyl from carbon 5 fraction

A technology for separating cyclopentadiene and cyclopentadiene, applied in chemical instruments and methods, hydrocarbons, hydrocarbons, etc., can solve the problems of not being an economical implementation, increasing production costs, etc., and reducing polymerization. The reaction occurs and the effect of improving product quality

Active Publication Date: 2009-06-10
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

Obviously, this will increase the production cost of the whole process and is not an economical implementation in industry

Method used

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  • Method for separating and cracking cyclopentadienyl from carbon 5 fraction

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Embodiment 1

[0031] Utilize the cracking C5 fraction in Table 1 below, and use the method for separating and cracking cyclopentadiene in the C5 fraction of the present invention to remove cyclopentadiene.

[0032] First, the cracked C5 fraction enters the rectification tower, the number of theoretical plates of the rectification tower is 60, the feed inlet is on the 30th plate, the temperature at the top of the tower is 45°C, the pressure at the top of the tower is 2.5MPa, and the reflux ratio is 5 . The output at the top of the tower is 50% (mass) of the feed amount. From the 35th plate, the liquid phase stream is drawn, and the drawn amount is 10% (mass) of the feed amount, and is sent to the suspended dimerization reactor with a pump, so that the residence time in the dimerization reactor is 1.5 hours, The reactor does not use an external heater, but uses the temperature of the material itself, and then sends the material to the rectification column from the 40th plate. According to t...

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Abstract

The invention discloses a method for separating and cracking cyclopentadiene in C5 distillate. The method belongs to the technical field of C5 separation. In order to solve the problems that the industry requires the dimerization reaction of cyclopentadiene as much as possible; and the industry also requires the higher quality of a dicyclopentadiene product and little loss of isoprene, the invention provides the method which comprises the following steps: setting a suspension type dimerization reactor on the body of a C5 mixture rectification tower, leading liquid phase material stream from a tower plate of the rectification tower and pumping the liquid phase material stream into the dimerization reactor, making the cyclopentadiene in the material stream to have a liquid phase dimerization reaction in the suspension type dimerization reactor, and then returning the material stream back to the rectification tower from the suspension type dimerization reactor. The method can be applied to the prior industrial C5 production device and the process of one-section extraction separation and cracking of C5 distillate. The method can reduce polyreaction besides the self-dimerization of cyclopentadiene, improve the quality of the dicyclopentadiene product, reduce the loss rate of isoprene, and reduce the cyclopentadiene content in the materials as much as possible.

Description

technical field [0001] The present invention relates to a method for separating or reducing cyclopentadiene from cracking C5 cuts, more specifically, the present invention relates to a method for separating cyclopentadiene by suspending a dimerization reactor on a rectification tower. Background technique [0002] In the process of producing ethylene from petroleum cracking, a considerable amount of C5 fraction is by-produced, and the C5 fraction is rich in diolefins such as isoprene, cyclopentadiene and piperylene. These diolefins are chemically active and are important chemical raw materials. Due to the difference in cracking raw materials, cracking depth and separation degree of petroleum hydrocarbons, the content of diolefins in cracked C5 fractions is different, and the total content 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 u...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C13/61C07C13/15C07C2/42
Inventor 田保亮唐国旗张齐
Owner CHINA PETROLEUM & CHEM CORP
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