Patent ID: 8916729

Claim:
A process for the preparation of a compound of formula (1) [Kt] x+ [(C n F 2n+1 ) Z PF 5-z H] − x , (1) in which [Kt] x+ is an inorganic or organic cation, n is 1-8, x is 1-4, and z is 1-4, said process comprising: in a first step, reacting a compound of formula (2) (C n F 2n+1 ) z PF 5-z (2) with a hydride ion donor, and if [Kt] x+ in formula (1) is an organic cation, in a second step, optionally reacting the product from said first step with a compound of formula (3) [Kt] x+ [X] − x , (3), in which [Kt] x+ stands for an organic cation and [X] − stands for a hydrophilic anion.