Purification of fluoroalkanesulfonate salts

US8461378B2 · kind B2 · utility

Assignee

• E.I. DU PONT DE NEMOURS AND COMPANY · US

Inventors

• Allen Capron Sievert · Elkwood Estates, US
• Lee G. Sprague · Augusta, US
• James Schultz · Lake Zurich, US
• Katelyn Rae Walck · West Chester, US

Key dates

• Filing date: Sep 10, 2010
• Grant date: Jun 11, 2013
• Expiry date: Aug 16, 2031

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C303/44
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A process for the purification of fluoroalkanesulfonate salt comprising (a) contacting a mixture of said salt and an inorganic salt contaminant with a solvent to selectively dissolve said fluoroalkanesulfonate salt in solution, and (b) isolating the solution, to yield a fluoroalkanesulfonate salt containing less than 500 micrograms of inorganic salt contaminant per gram of fluoroalkanesulfonate salt, or containing less than a maximum of 0.3% by weight of individual solvent.