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Method for producing hexafluoropropylene oxide

A technology of hexafluoropropylene oxide and its manufacturing method, which is applied in the direction of organic chemistry, can solve the problems of high manufacturing cost of HFPO, high cost of interphase transfer catalyst, etc., and achieve the effect of high selectivity

Active Publication Date: 2012-02-15
DAIKIN IND LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0014] In a two-phase system of an aqueous phase and an organic phase, in the presence of an interphase transfer catalyst such as a quaternary ammonium salt or a quaternary phosphonium salt, in the method for obtaining HFPO by oxidizing HFP with a hypohalite, it is difficult to make the interphase transfer after use Catalyst regeneration, therefore, the cost of interphase transfer catalyst is high, so there is a problem that the production cost of HFPO becomes high

Method used

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  • Method for producing hexafluoropropylene oxide
  • Method for producing hexafluoropropylene oxide

Examples

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Embodiment 1

[0066] refer to figure 1 , The present embodiment relates to an example of using the inner space of the thin tube 21 (shown by a dotted line in the figure) as a tiny space. For the thin tube 21, a SUS316 tube having a nominal inner diameter of 1.0 mm and a length of 0.5 m was used. A jacket 21a is used for the thin tube 21, so that temperature can be controlled. The inlet side of the narrow tube 21 is connected to a T-shaped connector 21b made of SUS (approximately 1 / 16 inch in outer diameter, produced by Swagelok Co.), so that the organic phase and water can be combined and supplied from the pipes 9 and 19 to the thin tube 21, respectively. 2 fluids in phase. In addition, nuts etc. are suitably used for a connection part.

[0067] First, if figure 1 As shown, HFP is introduced from the HFP cylinder 1 to the pump chamber 7 a of the syringe pump 7 through the pipe 5 , and then an organic solvent (water-soluble and aprotic organic solvent) is introduced from the organic solven...

Embodiment 2 and 3

[0077] The same procedure as in Example 1 was carried out except that diglyme and N,N-dimethylformamide (DMF) were used instead of acetonitrile as organic solvents. Both diglyme and N,N-dimethylformamide (DMF) are water-soluble and aprotic organic solvents. Table 1 shows the results together.

Embodiment 4

[0079] In addition to the use of calcium hypochlorite (Ca(ClO) 2 ) to replace sodium hypochlorite (NaClO), the same operation as in Example 1. Table 1 shows the results together. In addition, in this example, in the recovered reaction mixture, CaF 2 .

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Abstract

Disclosed is a novel method for producing hexafluoropropylene oxide, wherein a high HFPO selectivity can be achieved without using a phase-transfer catalyst. Specifically, hexafluoropropylene (HFP), a water-soluble and aprotic organic solvent, and an aqueous oxidant solution are brought into contact with each other in a very small space, so that hexafluoropropylene and the oxidant are reacted with each other, thereby obtaining hexafluoropropylene oxide (HFPO).

Description

technical field [0001] The present invention relates to a method for producing hexafluoropropylene oxide, and more specifically, to a method for obtaining hexafluoropropylene oxide by oxidation of hexafluoropropylene. Background technique [0002] Hexafluoropropylene oxide can be 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 used as lubricating oils and heat carriers. [0003] Conventionally, as a method for producing hexafluoropropylene oxide (hereinafter also referred to as HFPO), a method of obtaining HFPO by oxidation of hexafluoropropylene (hereinafter also referred to as HFP) using hypochlorite as an oxidizing agent has been developed. [0004] For example, in a two-phase system of an aqueous phase and an organic phase, in the presence of an interphase transfer catalyst such as a quaternary ammonium salt or a quaterna...

Claims

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Application Information

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IPC IPC(8): C07D301/12C07D303/08
CPCC07D301/12C07D303/48C07D301/03C07D303/08
Inventor 市原一义中谷英树平井麻衣仙波靖英
Owner DAIKIN IND LTD
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