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Copper catalytic preparation method of cyclopentanone

A cyclopentanone, copper catalyzed technology is applied in the preparation of carbon-based compounds, chemical instruments and methods, preparation of organic compounds, etc. Source-rich, easy-to-manipulate effects

Pending Publication Date: 2021-04-16
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The method can effectively solve the problems of low yield, complicated sources of raw materials, high cost, and serious equipment corrosion and environmental pollution caused by the use of sulfuric acid in the preparation process of the intermediate product cyclopentanol in the existing cyclopentanone preparation process.

Method used

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  • Copper catalytic preparation method of cyclopentanone
  • Copper catalytic preparation method of cyclopentanone
  • Copper catalytic preparation method of cyclopentanone

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Experimental program
Comparison scheme
Effect test

Embodiment 1～10

[0038] 1. Oxidation reaction

[0039] The conversion of cyclopentene and the selectivity of 1,2-epoxycyclopentane are calculated according to the following formula:

[0040]

[0041]

[0042] Among them, (cyclopentene content) in Indicates cyclopentene import molar content; (cyclopentene content) out Indicates the molar content of cyclopentene outlet; (1,2-epoxycyclopentane molar content) indicates the molar content of 1,2-epoxycyclopentane in the reaction liquid after oxidation reaction; (cyclopentene molar content) in represents Cyclopentene import molar content; (cyclopentene molar content) out means cyclopentene export molar content.

[0043] The reactor for the oxidation reaction is a tank reactor. Add cyclopentene and acetone to the reactor in proportion, and then put in the catalyst TS-1 molecular sieve catalyst in proportion. The catalyst is provided by Sinopec Shanghai Petrochemical Research Institute. The additive NaHCO 3 and hydrogen peroxide for an oxidation...

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Abstract

The invention belongs to the technical field of organic chemical engineering, and discloses a copper catalytic preparation method of cyclopentanone. The method adopts three steps to meet process requirements: (1) oxidation reaction: taking cyclopentene as a raw material, adopting hydrogen peroxide as an oxidizing agent, adding an oxidation catalyst, an auxiliary agent and a solvent, and carrying out oxidation reaction in a reactor to generate 1, 2-cyclopentane oxide; (2) hydrogenation reaction: taking 1, 2-cyclopentane oxide as a raw material, and under the action of a copper-based catalyst, carrying out a hydrogenation reaction process in a kettle type or fixed bed reactor to generate cyclopentanol; and (3) dehydrogenation reaction: taking cyclopentanol as a raw material, adding a dehydrogenation catalyst, and carrying out dehydrogenation reaction in a reaction rectification device to generate cyclopentanone. The copper catalytic preparation method of cyclopentanone provided by the invention is environment-friendly, mild in operation condition and high in cyclopentanone yield, and reduces pollution of a strong acid preparation process to equipment and the environment.

Description

technical field [0001] The invention belongs to the technical field of organic chemical industry, and specifically relates to a method for preparing cyclopentanol from cyclopentene, and then dehydrogenating the cyclopentanol to generate cyclopentanone. Background technique [0002] 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 in the electronics industry. Starting from the cyclopentene separated from the C5 fraction of the by-product of naphtha cracking to ethylene as a raw material, cyclopentanone can be produced. The main process is cyclopentene N 2 O direct oxidation method and cyclopentene hydration-dehydrogenation method are two technical routes. Among them, N 2 Alt...

Claims

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Application Information

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IPC IPC(8): C07C45/00C07C49/395B01J23/843
CPCY02P20/10
Inventor 常慧陆鑫秦技强叶军明孙骏瞿卫国
Owner CHINA PETROLEUM & CHEM CORP
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