What dissolves cyan-salts (NaCN and KCN) without destroying them the way water does via hydrolysis?
I have to make my own cyan-salts, so they're somewhat precious to me. Every time I have to separate them (from metal cyanides as well as carbon and oxide impurities) using water I lose some: I can precipitate some from an aqueous solution with alcohol, but the rest hydrolyses significantly before it can be desiccated with the "amateur"-grade gear I have (I've tried both freeze-drying and vacuum drying).
What solvents can separate the cyan-salts from the other substances without hydrolysing, oxidizing, or otherwise destroying them? (Ideally a solvent that is relatively volatile at room temperature so I can readily evaporate it to recover the salts.)