Method for preparing perfluoro-isobutyronitrile and intermediates thereof

A technology of perfluoroisobutyronitrile and perfluoroisobutyramide is applied in the field of preparation of perfluoroisobutyronitrile, which can solve the problems of difficult treatment and industrial application of trifluoroacetic acid pyridinium salt, and achieves reduction of three wastes and reaction operation. Simple, novel raw material route effect
CN109748814AInactive Publication Date: 2019-05-14ZHEJIANG LANTIAN ENVIRONMENTAL PROTECTION HI TECH +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
ZHEJIANG LANTIAN ENVIRONMENTAL PROTECTION HI TECH
Publication Date
2019-05-14
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a method for preparing perfluoro-isobutyronitrile. The method includes carrying out reaction on perfluoro-isobutyryl fluoride and ammonia solution or ammonia gas in water or organic solvents to generate perfluoro-isobutyramide at first; dehydrating the perfluoro-isobutyramide by dehydrating agents to obtain the perfluoro-isobutyronitrile. The method has the advantages of novel raw materials and routes, simplicity in reaction operation, high product yield and low waste gas, wastewater and industrial residue quantities.
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Description

Technical field

[0001] The invention relates to a preparation method of fluorine-containing nitrile, in particular to a preparation method of perfluoroisobutyronitrile. Background technique

[0002] Sulfur hexafluoride is the main insulating gas in the high-voltage transmission pipeline system due to its good insulation and arc extinguishing performance. Perfluoroisobutyronitrile has a dielectric strength better than or equivalent to sulfur hexafluoride, and a very low GWP (Global Warming Potential, SF 6 It is 23900, and perfluoroisobutyronitrile is 2100), which has become the main potential substitute for sulfur hexafluoride.

[0003] For the preparation method of perfluoroisobutyronitrile, there are the following reports in the prior art:

[0004] (1) The literature J. Chem. Soc. Perkin Trans 1 1990, 4, 983 reported the use of photochemical methods to synthesize perfluoroisobutyronitrile compounds with fluoro-1,2,3-triazine compounds as raw materials. This method does not disclos...

Claims

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