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Method for producing carbonyl fluoride and hexafluoropropylene oxide

A technology of hexafluoropropylene oxide and carbonyl fluoride, which can be used in chemical instruments and methods, carbon compounds, organic chemistry, etc., and can solve problems such as invisible uses.

Active Publication Date: 2012-12-12
DAIKIN IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] However, as for the carbonyl fluoride oligomer itself, no industrial use is currently seen, and it is discarded after being neutralized with an alkali.

Method used

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  • Method for producing carbonyl fluoride and hexafluoropropylene oxide
  • Method for producing carbonyl fluoride and hexafluoropropylene oxide
  • Method for producing carbonyl fluoride and hexafluoropropylene oxide

Examples

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Embodiment approach 1）

[0044] edge reference figure 1 One embodiment of the present invention will be described in detail.

[0045] ·Process a)

[0046] Such as figure 1 As shown, HFP and oxygen (O 2 ), in reactor 1, HFP is oxidized by oxygen (liquid phase reaction) to generate HFPO.

[0047]

[0048] As the solvent, saturated halogenated hydrocarbons inactive in the oxidation reaction can be used, for example, 1,1,2-trichloro-1,2,2-trifluoroethane, trichlorofluoromethane, perfluoro(dimethyl cyclobutane), carbon tetrachloride, etc.

[0049] In the above oxidation reaction, in addition to HFPO as the target substance, the following general formula (X) is also by-produced:

[0050] CF 3 O(CF 2 O) n -R...(X)

[0051] (In the formula, -R represents -COF, -OCOF or -CF 2 COF, n represents an integer of 0-50, preferably an integer of 0-15. ) of the oligomers shown.

[0052] The oligomer represented by the general formula (X) may be one type of compound, but usually may be a mixture in which a ...

Embodiment approach 2）

[0081] edge reference figure 2 Another embodiment of the present invention will be described in detail. Hereinafter, the difference from Embodiment 1 will be mainly described, and unless otherwise specified, it is assumed to be the same as Embodiment 1.

[0082] Such as figure 2 As shown, in this embodiment, the second mixture or separated from the second mixture comprising COF 2 The components are returned to Reactor 1. The resulting first mixture, compared to the first mixture in Embodiment 1, COF 2 content (or content rate) increases.

[0083] Generally speaking, because carbonyl fluoride (COF 2 ), so the existing HFPO manufacturing equipment usually includes the separation and recovery of COF 2 s installation. By adding a thermal decomposer 3 to the existing HFPO manufacturing equipment, the COF generated in the thermal decomposer 3 is decomposed 2 Take the second mixture or contain COF 2 The components are returned to the reactor 1, and the COF can be easily se...

Embodiment approach 3）

[0087] edge reference image 3 Another embodiment of the present invention will be described in detail. Hereinafter, the difference from Embodiment 2 will be mainly described, and it is the same as Embodiment 2 unless otherwise specified.

[0088] Such as image 3 As shown, in this embodiment, between the reactor 1 and the thermal decomposer 3, the second mixture is added to the first mixture or the COF-containing 2 components as the third mixture. Compared to the first mixture, the resulting COF of the third mixture 2 The content (or content rate) increases.

[0089] As mentioned above, the existing HFPO manufacturing equipment usually includes the separation and recovery of COF 2 s installation. By adding a thermal decomposer 3 to the existing HFPO manufacturing equipment, the COF generated in the thermal decomposer 3 is decomposed 2 , to a second mixture or containing COF 2 By way of components, returning to any suitable position between reactor 1 and thermal decomp...

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Abstract

Disclosed is a method for efficiently jointly producing carbonyl fluoride and hexafluoropropylene oxide. Specifically disclosed is a method for producing carbonyl fluoride and hexafluoropropylene oxide wherein a step (a) for obtaining a first mixture containing hexafluoropropylene oxide, from the oxidation of hexafluoropropylene by oxygen, and an oligomer represented by the general formula CF3O(CF2O)n-R (wherein, -R indicates -COF, -OCOF or -CF2COF, and n indicates an integer of 0 - 50) and a step (b) for obtaining a second mixture containing carbonyl fluoride and hexafluoropropylene oxide by thermal decomposition of the oligomer in the presence of the hexafluoropropylene oxide are carried out.

Description

technical field [0001] The present invention relates to the manufacture method of carbonyl fluoride and hexafluoropropylene oxide. Background technique [0002] Carbonyl fluoride (COF 2 ) are widely used as reagents in organic synthesis. It is also considered as a candidate for next-generation dry etching gas. [0003] On the other hand, hexafluoropropylene oxide is used, for example, as a raw material of perfluorovinyl ether, and is an important compound in the production of fluorine-containing compounds. In addition, oligomers of hexafluoropropylene oxide are also used as lubricating oil and heat medium. [0004] As a method for producing hexafluoropropylene oxide (hereinafter also referred to as HFPO), a method of obtaining HFPO by oxidizing hexafluoropropylene (hereinafter also referred to as HFP) with oxygen is known (see Patent Documents 1 and 2). [0005] In the production method of such HFPO, carbonyl fluoride (COF 2 ) (refer to Patent Document 1). [0006] In ...

Claims

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Application Information

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IPC IPC(8): C07D301/06C01B31/00C07D303/08
CPCC07D303/48C01B31/00C07D301/06C01B32/00
Inventor 森本和贺中谷英树市原一义平井麻衣小薮文彦
Owner DAIKIN IND LTD
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