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Industrialized manufacturing technique for hexafluoropropylene oxide

A technology of hexafluoropropylene oxide and production process, which is applied in the direction of organic chemistry, can solve the problems of many by-products, low conversion rate of hexafluoropropylene oxide, and poor selectivity, so as to reduce the generation of by-products and improve the reaction conversion rate, the effect of increasing selectivity

Active Publication Date: 2009-02-18
衢州环新氟材料有限公司
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Problems solved by technology

But its biggest disadvantage is that the conversion rate of hexafluoropropylene oxide is low, the highest can only reach 85%, usually below 80%
[0011] The disadvantages of the method reported in the above patent documents are that the yield of hexafluoropropylene oxide is low, the selectivity is poor, and there are many by-products, which cause problems such as increased production costs and difficulties in post-processing.

Method used

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  • Industrialized manufacturing technique for hexafluoropropylene oxide

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Embodiment 1～11

[0032] refer to figure 1 , add solvent, additives, and hexafluoropropylene into a 10L reactor, raise the temperature to a reaction temperature of 90-130°C, keep the reaction pressure at 4-5Mpa, and continuously add oxygen (the mass ratio of oxygen to hexafluoropropylene is controlled to be 1: 8-9) To the end of the reaction, after separation, washing with water and alkali, and purification, the conversion rate of hexafluoropropylene and the selectivity of hexafluoropropylene oxide are calculated, as shown in Table 1 below.

[0033] Table 1

[0034]

[0035]

[0036] As can be seen from the data in Table 1, adding an auxiliary agent in the solvent of the present invention can greatly improve the conversion rate of hexafluoropropylene and the selectivity of hexafluoropropylene oxide at the same time, especially the auxiliary agent used in Examples 5 and 8 Combination has achieved the most excellent effect.

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Abstract

The present invention relates to an industrial production process of hexa-fluorine epoxypropane. Hexa-fluorine propylene and oxygen perform liquid-phase oxidation in a reaction solvent, an auxiliary agent is added into the reaction solvent, the volume of the auxiliary agent is 0.3 to 5 percent of the volume of the reaction solvent, the reaction solvent is selected from perfluorocycloalkane; and the auxiliary agent is selected from one of or an arbitrary combination of the following substances: a halogenating alkyl phenylate with a molecular formula C6H5OCnH2nX and alkyl naphthalene with a molecular formula C10+pH8+2p. Because the perfluorocycloalkane and the solvent composed of halogenating alkyl phenylate / alkyl naphthalene are used as media for the reaction for producing the hexa-fluorine epoxypropane, the present invention has the advantages of economy, environmental protection, high conversion, good selectivity, and the like.

Description

(1) Technical field [0001] The invention relates to an industrialized production process of hexafluoropropylene oxide. (2) Background technology [0002] Hexafluoropropylene oxide (HFPO for short), also known as perfluoropropylene oxide, is a colorless, odorless, non-flammable gas with a boiling point of -27.4°C. When dry and in the absence of acid and alkali, it can be pressurized and liquefied. It can be stored stably at room temperature without self-polymerization. It will be decomposed by heat at 150°C. Due to its unique ring structure with high chemical activity, it can be used as an intermediate of many fluorine-containing organic compounds. For example, self-polymerization can occur in the presence of a catalyst, and it can be rearranged into hexafluoroacetone under the catalysis of Lewis acid. Acyl fluorides such as lactones react to form perfluoroalkyl vinyl ethers, and at the same time react with nucleophiles such as water, alcohols, sulfuric acid, amines, etc. to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D301/06C07D303/08
Inventor 方海滔应永安周鹏靖谢福钦倪一峰
Owner 衢州环新氟材料有限公司
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