Patent · US Active

Process for the preparation of bis(perfluoroalkyl)phosphinic acid anhydrides

US9163039B2 · kind B2 · utility

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19Claims

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Assignee

Merck Patent GmbH · DE

Inventors

Nikolai (Mykola) Ignatyev · Duisburg, DE
Waldemar Wiebe · Cologne, DE
Helge Willner · Neheim, DE

Key dates

Filing date	Jul 6, 2012
Grant date	Oct 20, 2015
Priority date	—
Expiry date	Jul 21, 2032

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB01D2251/61
WIPO fieldChemical engineering
WIPO sectorChemistry

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.