Fluorine-containing heat transfer fluid, and preparation method and application thereof

Abstract

The invention discloses a fluorine-containing heat transfer fluid. The fluid comprises any one or more structures as described in a formula (I) and / or any one or more structures as described in a formula (II). In the formulas, R1 is H, F or an alkoxy group, R2 is H, F, Cl or an alkoxy group, R3 and R4 are F or alkoxy groups, R5 is H, F or an alkoxy group, and the alkoxy group is -O-C<x>F<y>H<2x+1-y>; and x is a natural number, y is a non-negative integer, and n is 1, 2 or 3. The invention also discloses a preparation method of the fluorine-containing heat transfer fluid. The preparation methodcomprises the step of carrying out a nucleophilic substitution reaction on halogenated cycloolefin and alcohol to prepare the fluorine-containing heat transfer fluid as shown in the formula (I). Thefluorine-containing heat transfer fluid provided by the invention has the advantages of high dielectric strength, low toxicity, low global warming potential, good heat transfer performance, high boiling point, simple synthetic route and high synthetic efficiency, and is suitable for being used as a heat transfer fluid.

Description

technical field [0001] The invention belongs to the technical field of fluid heat transfer. Specifically, it relates to a fluorine-containing heat transfer fluid and its preparation method and application. Background technique [0002] Fluorinated heat transfer fluids have high dielectric strength, low toxicity, good heat transfer properties, and high boiling points. Currently, heat transfer fluids include perfluorocarbons, perfluoropolyethers, linear hydrofluoroethers, and perfluoroamines. [0003] Existing fluorine-containing fluids have high dielectric strength and high resistivity. However, the global warming potential (GWP) of perfluorocarbons, perfluoroamines and perfluoropolyethers 100 ) is generally greater than 5000, or even higher, the atmospheric lifetime is hundreds of years, and the residence time in the atmosphere is long. Therefore, perfluorocarbons, perfluoroamines and perfluoropolyethers are not ideal heat transfer fluids. The GWP of hydrofluoroether 1...

AI Technical Summary

Problems solved by technology

However, the global warming potential (GWP) of perfluorocarbons, perfluoroamines and perfluoropolyethers 100 ) is generally greater than 5000, or even higher, and the atmospheric lifetime is as long as hundreds of years, and the residence time in the atmosphere is long

Therefore, perfluorocarbons, perfluoroamines, and perfluoropolyethers are not ideal heat transfer fluids

And the GWP of hydrofluoroether 100 The value is generally low and has good environmental characteristics, but most of the common hydrofluoroethers are in a straight chain configuration, and often have a low boiling point, which cannot meet the operating requirements of devices loaded with heat transfer fluids

In addition, the existing perfluoroamines are mainly synthesized by the synthesis process of electrolytic fluorination, which has the defects of difficult synthesis and low synthesis efficiency.

[0004] In summary, there is currently no fluorine-containing heat transfer fluid on the market that simultaneously satisfies high dielectric strength, low toxicity, good heat transfer performance, high boiling point, and low GWP. 100 Value usage requirements

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