Method for preparing cyclopentanone

A technology of cyclopentanone and epoxycyclopentane, applied in the field of organic chemical industry, can solve the problems of equipment corrosive environment, complex source of raw materials, low yield, etc., and achieve the effects of environmental safety and friendliness, abundant source of raw materials and high yield

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

AI Technical Summary

Problems solved by technology

The method can effectively solve the disadvantages of low yield, complicated sources of raw materials, 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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  • Method for preparing cyclopentanone
  • Method for preparing cyclopentanone
  • Method for preparing cyclopentanone

Examples

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, and cyclopentene and acetone are added to the reactor in proportion, and then TS-1 molecular sieve catalyst is put in in proportion. The catalyst is provided by Sinopec Shanghai Petrochemical Research Institute, and the additive NaHCO 3 and hydrogen peroxide for an oxid...

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Abstract

The invention belongs to the technical field of organic chemical industry, and discloses a method for preparing 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: using 1, 2-cyclopentane oxide as a raw material, and carrying out hydrogenation reaction process in a kettle or fixed bed reactor under the action of a palladium catalyst 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 method for preparing cyclopentanone provided by the invention is environment-friendly, mild in operation condition and high in cyclopentanone yield, and pollution of a strong acid preparation process to equipment and the environment is reduced.

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 Synthesis of other pesticides. In addition, because cyclopentanone has good solubility, it is widely used as a solvent in the electronics industry. The by-product C produced by cracking naphtha to ethylene 5 The cyclopentene separated from the fraction can be used as raw material to produce cyclopentanone. The main process is cyclopentene N 2 O direct oxidation method and cyclopentene hydration-dehydrogenation method are two technical...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C45/00C07C49/395
CPCY02P20/10
Inventor 常慧黄勇叶军明瞿卫国孙骏陆鑫
Owner CHINA PETROLEUM & CHEM CORP
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