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Method for simultaneously preparing perfluoropentanone and perfluoroheptanone

A technology for perfluoropentacarbonone and perfluoropentacarbonone is applied in the field of simultaneous preparation of perfluoropentacarbonone and perfluoroheptacarbonone, which can solve the problems of small output, inability to simultaneously prepare perfluoroketone compounds, etc. Low cost, controllable conditions, high production efficiency and high conversion efficiency

Inactive Publication Date: 2019-03-22
TIANJIN CHANGLU CHEM NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

CN106946669A etc. have all reported the synthetic method of perfluoropentacarbonone, although there is also the existence of perfluoropentacarbonone wherein, perfluoroheptacarbonone belongs to by-product, and output is very little
Regardless of their respective advantages and disadvantages, the above methods are only the preparation methods for producing perfluoropentacarbonone or perfluoroheptacarbonone alone, and cannot simultaneously prepare these two perfluoroketone compounds

Method used

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  • Method for simultaneously preparing perfluoropentanone and perfluoroheptanone
  • Method for simultaneously preparing perfluoropentanone and perfluoroheptanone
  • Method for simultaneously preparing perfluoropentanone and perfluoroheptanone

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Embodiment 1

[0023] Embodiment 1: Preparation of hexafluoropropylene dimer raw material: Hexafluoropropylene gas is passed through the catalytic reaction tube equipped with NaF / Al2O3 catalyst, the loading capacity of the catalyst is 10%, and the contact time is 0.1s; the temperature of the catalytic reaction tube The temperature is 150°C. The reacted mixed gas enters the condenser with a cooling jacket from the gas port inlet. The temperature of the condensed water is 10°C. The unreacted hexafluoropropylene is circulated to the catalytic reaction tube through the gas outlet. The purity of the liquid hexafluoropropylene dimer in the receiver of the condenser was detected to be 99.3%. The yield of hexafluoropropylene dimer is shown in Table 1.

Embodiment 2

[0024] Example 2: Preparation of raw materials for hexafluoropropylene dimer: Hexafluoropropylene gas is passed through a catalytic reaction tube equipped with an AgF / C catalyst, the loading capacity of the catalyst is 15%, the temperature of the catalyst packed column is 180°C, and the contact time is For 10s, the reacted mixed gas enters the condenser with a cooling jacket through the air inlet, and the temperature of the condensed water is 10°C; the unreacted hexafluoropropylene is circulated to the catalytic reaction column through the outlet. The purity of the liquid hexafluoropropylene dimer in the condenser was detected to be 99.2%. The productive rate of hexafluoropropylene dimer after applying mechanically is shown in Table 1.

Embodiment 3

[0025] Embodiment 3: the preparation of hexafluoropropylene dimer raw material: hexafluoropropylene gas is passed through the catalytic reaction tube that KF / C catalyst is housed, and the loading capacity of catalyst is 20%, and the temperature of catalyst packing column is 220 ℃, contact time The reaction time is 30s; the reacted mixed gas enters the condenser with a cooling jacket through the air inlet, the temperature of the condensed water is 10°C, and the unreacted hexafluoropropylene is circulated to the catalytic reaction tube through the outlet. The purity of the liquid hexafluoropropylene dimer in the condenser was detected to be 99.3%. The productive rate of hexafluoropropylene dimer after applying mechanically is shown in Table 1.

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Abstract

The invention belongs to the field of fluorine chemical industry and particularly relates to a method for simultaneously preparing perfluoropentanone and perfluoroheptanone. The method comprises the following steps: 1) subjecting oxygen gas and a hexafluoropropylene dimer, which serve as raw materials, to a contact reaction in the presence of a first catalyst, so as to obtain a cracked product; 2)subjecting the cracked product obtained in the step 1) to a reaction with hexafluoropropylene in the presence of a second catalyst; 3) rectifying the product obtained in the step 2). According to themethod, two kinds of important compounds, i.e., the perfluoropentanone and the perfluoroheptanone can be simultaneously produced, the reaction is a continuous reaction, the production efficiency andconversion efficiency are relatively high, the equipment cost is low, the entire flow is simple and convenient in operation and is safe, and thus, the method is adaptable to the simultaneous large-batch preparation of the perfluoropentanone and the perfluoroheptanone.

Description

technical field [0001] The invention belongs to the field of fluorine chemical industry, and in particular relates to a method for simultaneously preparing perfluoropentacarbonone and perfluoroheptacarbonone. Background technique [0002] In recent years, people have paid more and more attention to the protection of the environment. In order to reduce the damage to atmospheric ozone and limit the emission of greenhouse gases, higher requirements are put forward for the properties of fluorine-containing substances used as insulating gases, refrigerants, foaming agents, cleaning agents, fire extinguishing agents and solvents. Perfluoroketones have attracted extensive attention due to their good inertness, thermal and hydrolytic stability, short atmospheric lifetime during use, and low global warming potential. Among them, perfluoropentacarbonone has both excellent insulation properties, extremely low GWP value and ODP value, and it is considered to be an ideal substitute for ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C45/45C07C49/167C07C51/58C07C53/48C07C53/50
CPCC07C45/455C07C51/58C07C53/48C07C53/50C07C49/167
Inventor 郭海强李希仑贺光瑞李景旺
Owner TIANJIN CHANGLU CHEM NEW MATERIAL CO LTD
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