Method of preparing LiPF.sub.6

US5866093A · kind A · utility

Assignee

• SOLVAY FLUOR und DERIVATE GmbH · DE

Inventors

• Heinz-Joachim Belt · Burgwedel, DE
• Dirk Seffer · Neustadt, DE
• Werner Rudolph · Hannover, DE

Key dates

• Filing date: Jun 23, 1997
• Grant date: Feb 2, 1999
• Expiry date: Jun 23, 2017

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C01D15/005
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A method for preparing lithium hexafluorophosphate, which is useful as an electrolyte in primary and secondary cells, involves combining and cooling phosphorus pentachloride and lithium fluoride, and then adding hydrogen fluoride. Using this method, which is simple to perform, a good yield of the product can be obtained.