Patent · US Active

Production of a hexafluorophosphate salt and of phosphorous pentafluoride

US10442698B2 · kind B2 · utility

0Cited by

1References

13Claims

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Assignee

The South African Nuclear Energy Corporation Limited · ZA

Inventors

Mpho Diphago Stanley Lekgoathi · Pretoria, ZA
Johannes Petrus Le Roux · Irene, ZA

Key dates

Filing date	Mar 31, 2014
Grant date	Oct 15, 2019
Priority date	—
Expiry date	Feb 4, 2035

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02P30/20
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

A process for producing a hexafluorophosphate salt comprises neutralizing hexafluorophosphoric acid with an organic Lewis base, to obtain an organic hexafluorophosphate salt. The organic hexafluorophosphate salt is reacted with an alkali hydroxide selected from an alkali metal hydroxide (other than LiOH) and an alkaline earth metal hydroxide, in a non-aqueous suspension medium, to obtain an alkali hexafluorophosphate salt as a precipitate. A liquid phase comprising the non-aqueous suspension medium, any unreacted organic Lewis base and any water that has formed during the reaction to form the precipitate, is removed. Thereby, the alkali hexafluorophosphate salt is recovered.

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