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Method for producing hexafluoropropane oxide and coproducing perfluorovinyl ether

A technology of hexafluoropropylene oxide and perfluorovinyl ether, which is applied in the field of preparation of fluorine-containing fine chemicals, can solve troubles and other problems, and achieve the effect of avoiding pollution and waste

Active Publication Date: 2013-06-26
SHANDONG DONGYUE WEILAI HYDROGEN ENERGY MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Judging from the situation disclosed in the above patent documents, most of them use HFPO as the raw material to carry out self-polymerization research, only US3114778 (1963) has carried out the experiment of the addition reaction of different acyl fluorides and HFPO, and reacted for a single raw material, especially the whole Fluoromethyl vinyl ether (PMVE), perfluoroethyl vinyl ether (PEVE), perfluoro-n-propyl vinyl ether (PPVE), need to use carbonyl fluoride, perfluoroacetyl fluoride, perfluoropropionyl fluoride separately It is troublesome to react with HFPO

Method used

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  • Method for producing hexafluoropropane oxide and coproducing perfluorovinyl ether
  • Method for producing hexafluoropropane oxide and coproducing perfluorovinyl ether
  • Method for producing hexafluoropropane oxide and coproducing perfluorovinyl ether

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preparation example Construction

[0020] 1. Preparation of mixed gas:

[0021] According to the prior art, hexafluoropropylene reacts with an oxidizing agent under certain conditions of temperature, pressure, solvent, etc. to obtain a mixed gas including hexafluoropropylene oxide, perfluoroacetyl fluoride, carbonyl fluoride and unreacted hexafluoropropylene and oxygen .

[0022] Main response:

[0023]

[0024] side effects:

[0025]

[0026] Oxygen and hexafluoropropylene are respectively placed in the oxygen barostat and hexafluoropropylene barostat through the regulating valve; the pressure of the oxygen and hexafluoropropylene barostat is controlled to be constant at 1.0-1.6Mpa; the oxygen and hexafluoropropylene are respectively passed through the regulating valve and The mass flow meter enters the mixer according to the mass ratio of hexafluoropropylene:oxygen of 5 to 9.4:1, and enters the reactor through the regulating valve. The ratio of the mass of the solvent in the reactor to the total mass...

Embodiment 1

[0040] Oxygen and hexafluoropropylene are respectively placed in the oxygen barostat and hexafluoropropylene barostat through the regulating valve; the pressure of the oxygen and hexafluoropropylene barostat is controlled to be constant at 1.2Mpa; the oxygen and hexafluoropropylene are respectively passed through the regulating valve and the mass flow rate According to the mass ratio of hexafluoropropylene:oxygen 6.25:1, it enters the mixer and enters the reactor through the regulating valve. The ratio of the mass of the solvent in the reactor to the total mass of the reactant hexafluoropropylene and oxygen is controlled at 8:1. The temperature in the reactor is 90°C and the pressure is 1.3Mpa. Oxygen and hexafluoropropylene react at this temperature and pressure to produce a mixed gas mainly containing hexafluorocyclopropane, carbonyl fluoride and perfluoroacetyl fluoride. In the mixed gas, hexafluoropropylene oxide is 60.72%, carbonyl fluoride is 11.8%, perfluoroacetyl fluori...

Embodiment 2

[0045] As described in Example 1, the difference is that oxygen and hexafluoropropylene enter the mixer at a mass ratio of hexafluoropropylene: oxygen of 7:1 through a regulating valve and a mass flow meter respectively, and 60.47% of hexafluoropropylene oxide in the mixed gas , carbonyl fluoride 10.9%, perfluoroacetyl fluoride 19.38%, hexafluoropropylene 7%, oxygen 1.26%. Both are mass ratios.

[0046] The above-mentioned mixed gas is passed into the crude fractionation tower, and the light components separated from the crude fractionation tower enter the rectification tower, and non-condensable gases such as oxygen are removed under the conditions of pressure 3.2MPa and top temperature -25°C to obtain carbonyl Fluorine and perfluoroacetyl fluoride-based mixed gas, carbonyl fluoride 32%, perfluoroacetyl fluoride 66%, hexafluoropropylene oxide 1%, hexafluoropropylene 1%. Both are mass ratios.

[0047] The above-mentioned mixed gas mainly composed of carbonyl fluoride and per...

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Abstract

The invention relates to a method for producing hexafluoropropane oxide and coproducing perfluorovinyl ether, which comprises the following steps of: performing reaction of oxidizing hexafluoropropylene to synthesize the hexafluoropropylene oxide to obtain mixed gas, introducing the mixed gas into a coarse fractionating tower, and rectifying and purifying the separated heavy component to obtain hexafluoropropylene oxide; making the separated light component enter a rectifying tower to remove non-condensable gas to obtain mixed gas of fluorophosgene and perfluacetylfluoride, and introducing the hexafluoropropylene oxide for polymerization to obtain a corresponding perfluoroalkylpolyether mixture; in the presence of sodium carbonate, performing cracking reaction at the temperature of between 150 and 300 to obtain a perfluorovinyl ether mixture; and separating by using the rectifying tower to respectively obtain three kinds of perfluorovinyl ether, namely PMVE, PEVE, PPVE. The method fulfills the aim of producing the hexafluoropropane oxide, and fully utilizes a byproduct, namely perfluorovinyl ether with high added-value generated by the reaction, and has the advantages of reasonable process and industrial application.

Description

technical field [0001] The invention belongs to the field of preparation of fluorine-containing fine chemicals, in particular to a production method for co-producing hexafluoropropylene oxide and perfluorovinyl ether. Background technique [0002] Perfluorovinyl ether is a general term for a class of compounds, which are generally produced on one set of equipment because of their similar chemical properties and production processes. [0003] Perfluorovinyl ether R f -O-CF=CF 2 , usually used as a comonomer in the production of thermoplastically processable fluoroplastics, fluororubbers and fluoropolymers containing functional groups. where R f The base ranges from the simplest trifluoromethyl group to a longer perfluoroalkyl group or even a polyether type or another functional group, such as COOH, SO 3 H, etc., depending on the selected perfluoroalkoxide. The acyl fluoride product obtained after addition with HFPO is hydrolyzed into a salt and then thermally cracked to ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C43/17C07C41/18
Inventor 王军王汉利
Owner SHANDONG DONGYUE WEILAI HYDROGEN ENERGY MATERIAL CO LTD
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