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Preparation method of high purity cyclopentene

A cyclopentene and high-purity technology, which is applied in the field of preparation of high-purity cyclopentene, can solve the problems of high energy consumption in the production process and low purity of cyclopentene, and achieve the effect of reducing energy consumption

Inactive Publication Date: 2013-09-18
上海博润石化科技发展有限公司 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The invention provides a method for preparing high-purity cyclopentene. The technical problem to be solved is that the purity of cyclopentene produced in the prior art is not high, and the production process has relatively high energy consumption.

Method used

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  • Preparation method of high purity cyclopentene

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Embodiment Construction

[0023] The following descriptions are only preferred embodiments of the present invention, and therefore do not limit the protection scope of the present invention.

[0024] Examples, see figure 1 Shown:

[0025] The partly hydrogenated C5 fraction whose composition is shown in Table 1 is rectified in the rectifying tower A. The rectification tower A is a packed tower with a theoretical plate number of 90-110. Partially hydrogenated C5 fraction is fed from the fiftieth plate of rectification tower A when it is preheated to 45-55°C. The temperature at the top is 45-55°C, the reflux ratio is 8-15, the low-boiling fraction with a mass percentage of 71% is extracted from the top of the tower, and the cyclic hydrocarbon fraction with a mass percentage of 21% is discharged from the bottom of the tower. In this step, light components with a boiling point lower than 38.57°C (2-methyl-2-butene boiling point) are separated from the top of the rectification tower A, while light compon...

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Abstract

The invention relates to the technical field of production of chemical products, and in particular relates to a preparation method of high purity cyclopentene. The method comprises the following steps of: feeding part of a hydrogenated c5 fraction to a rectifying tower A; separating a coarse isoamylene fraction from the top; obtaining a tower bottom liquid comprising cyclopentene and cyclopentane fractions from the kettle; feeding the tower bottom liquid after hydration reaction to a rectifying tower B for rectification; and extracting cyclopentene from the top. The method provided by the invention has the advantages that when the part of hydrogenated c5 fraction is separated to produce cyclopentene, 2-methyl-2-butene which is very approximate to cyclopentene in boiling point is converted into a heavy component with higher boiling point through the dimerization reaction on a catalyst bed layer, so that cyclopentene is easily separated from 2-methyl-2-butene, so that not only is the energy consumption remarkably reduced, but also cyclopentene with purity over 99% can be produced.

Description

technical field [0001] The invention relates to the technical field of chemical product preparation, in particular to a method for preparing high-purity cyclopentene. Background technique [0002] Cyclopentene is an intermediate of fine chemical products. It can be used to produce high value-added pharmaceutical intermediates such as cyclopentanol, bromocyclopentane, chlorocyclopentane, and cyclopentanoic acid. High-purity cyclopentene Olefin is also one of the main raw materials for polycycloolefin polymers. Among them, the production of cyclopentanone from cyclopentene is the most important application field of cyclopentene. Cyclopentanone is an intermediate in the perfume and pharmaceutical industries, and can be used to produce fine chemical products such as new perfume methyl dihydrojasmonate and brandyne and anxiolytic buspirone, and can also be used in insecticides and herbicides In addition, because cyclopentanone has good solubility, it is widely used as a solvent...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C13/12C07C7/148C07C7/04
Inventor 倪俊
Owner 上海博润石化科技发展有限公司
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