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Synthetic method for continuously preparing perfluorohexanone

A technology of perfluorohexanone and a synthesis method, which is applied in the synthesis field of continuous preparation of perfluorohexanone, can solve the problems of unstable reaction yield, low formula conversion rate, low production efficiency, etc. Use, high molar yield, and the effect of reducing waste water

Pending Publication Date: 2022-05-06
蓝菁(上海)安全技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This patent uses a composite catalyst, which is easy to deactivate, the reaction yield is unstable, and the conversion rate of some formulations is lower than 70%.
[0011] The existing technologies for preparing perfluoro-2-methyl-3-pentanone from perfluoro-2-methyl-2-pentene through epoxidation and isomerization inevitably require a large amount of acetonitrile Toxic solvents such as NaClO and other corrosive and irritating oxidants have the disadvantages of low production efficiency, high cost, and environmental pollution.

Method used

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  • Synthetic method for continuously preparing perfluorohexanone
  • Synthetic method for continuously preparing perfluorohexanone
  • Synthetic method for continuously preparing perfluorohexanone

Examples

Experimental program
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Effect test

Embodiment 1

[0034] In the reaction flask, add 30ml acetonitrile, stir at room temperature, add 10g sodium peroxide, then add 2G triethylamine as catalyst, cool to zero, drop 30g perfluoro-2-methyl-2-pentene, react at room temperature for half an hour, and evaporate 29g perfluorohexanone with a yield of 91%.

Embodiment 2

[0036] In the reaction bottle, add 30ml acetonitrile, stir at room temperature, add 10g sodium peroxide, then add 4G tributylamine catalyst, cool to zero, drop 30g perfluoro-2-methyl-2-pentene, and then react at room temperature for half an hour to evaporate 30g perfluorohexanone, with a yield of 95%.

Embodiment 3

[0038] In the reaction bottle, add 30ml acetonitrile, stir at room temperature, add 10g sodium peroxide, and then add catalyst. Add 30g perfluoro-2-methyl-2-pentene dropwise at room temperature with 2.6g n, n-dimethylcyclohexylamine. After addition, react at room temperature for half an hour, and evaporate 30g perfluorohexanone with a yield of 95%.

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Abstract

The invention relates to a synthetic method for continuously preparing perfluorohexanone, which comprises the step of converting perfluoro-2-methyl-2-pentene into perfluorohexanone in one step at the temperature of-10 to 60 DEG C in the presence of a bleaching agent, namely a peroxide metal salt oxidant which is widely used in daily life and a catalytic amount of organic alkali, so that reaction steps and three wastes are reduced. The method has the advantages of high production efficiency, low cost and less environmental pollution.

Description

technical field [0001] The invention belongs to the field of drug synthesis, in particular to a synthetic method for continuous preparation of perfluorohexanone. Background technology [0002] Perfluoro-2-methyl-3-pentanone (ASHRAE Chemical Code: fk-5-1-12) is an important fluorinated liquid. Its boiling point is 49 ℃, ozone depletion value (ODP) is 0, and global warming potential (GWP) is 1. It is a new generation of ODS substitute. It can be used as electronic cleaning agent, coolant, foaming agent and fire extinguishing agent. It can be used as a substitute for hf227 in fire extinguishing agent. It is a colorless liquid at room temperature and pressure, which is convenient for storage and transportation; It is easy to gasify, with high heat capacity, low fire extinguishing concentration and excellent fire extinguishing performance; Moreover, it has good insulation, little impact on relevant sensitive and valuable equipment and materials, no residue, and a wide range of applica...

Claims

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Application Information

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IPC IPC(8): C07C45/28C07C49/167
CPCC07C45/28C07C49/167
Inventor 姜标张亦弛郝经佳张黎明
Owner 蓝菁(上海)安全技术有限公司
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