first of couple of videos on the palladium refining subject
in this video palladium was converted to chloride and then reduced to palladium metal with formic acid
0:35 4:39 dissolution
4:40 11:50 filtration
11:51 13:00 converting nitrates to Ag and Pd chlorides with HCl
13:05 20:30 filtration and washing of AgCl
21:17 29:05 reducing Pd chloride to Pd metal with formic acid
29:06 31:46 reacting sodium formate with silver nitrate

special thanks to Аффинаж TV :
   / pavel5001