Perfluoroalkyl ether as well as preparation method and application thereof

Abstract

The invention discloses perfluoroalkyl ether as well as a preparation method and application thereof, and the preparation method comprises the following steps: with perfluorobutyryl fluoride as a raw material and dimethyl carbonate or diethyl carbonate as an alkylation reagent, reacting under the action of a catalyst to generate the product perfluoroalkyl ether. The perfluoroalkyl ether is prepared by a two-step method combining an electrochemical method and a chemical synthesis method. In the preparation process, no organic solvent is used, and meanwhile, low-toxicity environment-friendly carbonic ester is used as an alkylating reagent to ensure that the product is non-toxic and easy to treat. The method is simple in process, clear in product and easy to purify. The prepared product can be used as a cleaning agent and an insulating liquid.

Description

technical field [0001] The invention belongs to the technical field of perfluoroalkyl ether preparation, and relates to a perfluoroalkyl ether, a preparation method and application thereof. Background technique [0002] With the rapid economic growth, environmental problems have become the focus of widespread concern around the world. Perchlorofluorocarbons (CFCs) and hydrochlorofluorocarbons (HCFCs), which were once widely used, have been widely used due to their damaging effects on the ozone layer and serious greenhouse effects. , has been or will be eliminated. As a low-carbon hydrofluoroether, it not only has no damage to the ozone layer, but also has a lower GWP (global warming potential), and can be a good substitute for the application of CFCs and HCFCs. [0003] At present, there are few reports on low-carbon hydrofluoroether perfluoroalkyl ether, and the synthesis process is complex and often uses highly toxic chemical raw materials. For example, Chinese patent CN1...

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Problems solved by technology

[0003] At present, there are few reports on low-carbon hydrofluoroether perfluoroalkyl ethers, and the synthesis process is complicated and highly toxic chemical raw materials are often used. For example, Chinese patent CN109503366A provides a method for preparing perfluoroisobutyl ether from hexafluoro dimers. This patent uses a three-step method to synthesize perfluoroisobutyl ether, the process is relatively complicated, and highly toxic dimethyl sulfate is used as a methylation reagent in the raw material

Chinese patent CN1177374 mentions the two-step method of electrochemical and chemical synthesis to synthesize perfluoroalkyl ethers, but the patent does not describe the process of preparing intermediate products by electrochemical methods, and the patent also uses dimethyl sulfate as methylated Reagent

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