Preparation of lithium hexafluorophosphate solutions
AssigneeFMC Corporation
InventorsDennis J. Salmon, D. Wayne Barnette, Rebecca A. Barnett
Life of this patent
Estimating the term…
Abstract
A process for preparing solutions of lithium hexafluorophosphate comprising reacting, under basic conditions, a lithium salt with a salt selected from sodium, potassium, ammonium, or organo ammonium hexafluorophosphate salt in a low boiling, non-protic organic solvent to produce a solution of lithium hexafluorophosphate and a precipitated sodium, potassium, ammonium, or organo ammonium salt containing the anion of the reactant lithium salt.
Claims7
A process for preparing solutions of lithium hexafluorophosphate comprising reacting, under basic conditions, a lithium salt with a salt selected from the group consisting of sodium, potassium, ammonium, and organo ammonium hexafluorophosphate in a low boiling, non-protic organic solvent in a reaction zone that is continuously saturated with a compound selected from the group consisting of anhydrous ammonia, methyl amine and ethyl amine to produce a solution of lithium hexafluorophosphate and a precipitated sodium, potassium, ammonium, or organo ammonium salt containing the anion of the reactant lithium salt.
A process for preparing solutions of lithium hexafluorophosphate comprising reacting, under basic conditions, potassium hexafluorophosphate salt with lithium chloride in acetonitrile to produce a solution of lithium hexafluorophosphate and precipitated potassium chloride while keeping the solution basic by saturating the solution with anhydrous ammonia.
Dependencies are inferred from the claim text.