Process for the preparation of bis(perfluoroalkyl)phosphinic...

Details Process for the preparation of bis(perfluoroalkyl)phosphinic... Process for the preparation of bis(perfluoroalkyl)phosphinic...

2007-04-10

2007-04-10

Witherspoon, Sikarl A. (Department: 1621)

Organic compounds -- part of the class 532-570 series

Organic compounds

Phosphorus acids or salts thereof

C562S026000

Reexamination Certificate

active

10511157

ABSTRACT:
The present invention relates to a process for the preparation of bis(perfluoroalkyl)phosphinic acids comprising at least the reaction of at least one difluorotris(perfluoroalkyl)phosphorane or at least one trifluorobis(perfluoroalkyl)phosphorane with hydrogen fluoride in a suitable reaction medium, and heating of the resultant reaction mixture. The invention also relates to salts of bis(perfluoroalkyl)phosphinic acids and to the use thereof.

REFERENCES:
patent: 498311 (1976-01-01), None
patent: WO 30 002579 (2003-01-01), None
Kovaleva et al. Perfluoroalkylphosphonic Acids and Their Derivatives. Journal of General Chemistry USSR, Bd. 59, Nr. 3, 1989, p. 2245-2248.
Yagupol' Skii L M; “Electrochemical Fluorination of Trialkylphosphine Oxides” Journal of General Chemistry of the USSR, Consultants Bureau, New York, NY, US Bd. 54, Nr. 4, Part. 1, Apr. 1984, pp. 692-695.
Chemical Abstracts, vol. 84, No. 15, Apr. 12, 1976, Columbus, Ohio, US, abstract No. 105768, Semenii, V. Ya et al.: “Bis (Perfluoroalkyl) Phosphinic Acids”.
Mahmood, Tariq et al.: “Comparative Study of Tris (Trifluoromethyl) Phosphine Oxide, Tris (Nonafluorobutyl) Phosphine Oxide and Fluorobis (Nonafluorobutyl) Phosphine Oxide with Ammonia and Amines” Inorganic Chemistry (1988), 27(17, 2913-16.
Pavlenko N.V. et al.: “Esters of Bis(Perfluoroalkyl) Phosphinic Acids” Journal of General Chemistry USSR., Bd 59, Nr. 3, Aug. 20, 1989, pp. 474-476.

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