I prepared the Fétizon reagent for the oxidation of alcohol to ketone/aldehyde this way :
30 g of commercial Celite is stirred in 200 ml Ethanol with 20ml 37% HCl for 10 min, then filtered on Buchner and washed with tap water until pH is
neutral. The activated celite is dried at 140°C overnight. The color changed from light grey to white.
32 g of AgNO3 is dissolved in 300ml water and activated Celite is added. Upon stirring, a solution of 1.2 eq K2CO3 in 200ml water is added dropwise.
Ag2CO3 precipitate on Celite and the color turned to light green. The Celite is filtered again and washed with plenty of water and dried on a
rotavapor at 80°C under high vaccuum. Toluene is added and rotavapored under vaccum to remove the traces of water by azeotrope.
Since Ag salt are quite expensive I would like to know whether its possible to regenerate the Fétizon reagent after oxidation. I have plenty of
already used Fétizon.
Can I treat the dead Fétizon with conc. HNO3 and then add some carbonate in excess to precipitate again the Ag2CO3 ? Will HNO3 attack the Celite ?
Will NOx trouble the making of new Fétizon ?
