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US 9,163,039 B2Granted
Process for the preparation of bis(perfluoroalkyl)phosphinic acid anhydrides
AssigneeMerck Patent GmbH
InventorsNikolai (Mykola) Ignatyev, Waldemar Wiebe, Helge Willner
Life of this patent
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Abstract
The invention relates to a process for the preparation of bis(perfluoroalkyl)phosphinic acid anhydrides by reaction of a bis(perfluoroalkyl)phosphinic acid with phosphorus pentoxide, to novel bis(perfluoroalkyl)phosphinic acid anhydrides and to uses of bis(perfluoroalkyl)phosphinic acid anhydrides.
Claims19
A process for preparation of a bis(perfluoroalkyl)phosphinic acid anhydride comprising:
- reacting a bis(perfluoroalkyl)phosphinic acid with phosphorus pentoxide.
A compound of formula I
- (CxF2x+1)2(O)POP(O)(CxF2x+1)2 I
- where x denotes 3, 4, 5, 6, 7, 8, 9, 10, 11 or 12.
A dehydrating agent or desiccant comprising a compound of formula I
- (CxF2x+1)2(O)POP(O)(CxF2x+1)2 I
- where x denotes 1, 3, 4, 5, 6, 7, 8, 9, 10, 11 or 12,
- as a dehydrating agent or as desiccant.
Dependencies are inferred from the claim text.