Abstract: A catalyst is recovered from an aqueous reaction mixture comprising heterocyclic nitroxyl catalyst and oxidized cellulose, by: —separating the oxidized cellulose from the reaction mixture, —contacting the reaction mixture with solid hydrophobic adsorbent particles with particle sizes below 350, preferably below 200 ?m, more preferably below 100 ?m, said particles being silica particles provided with functionalized hydrophobicity, —adsorbing the catalyst to the hydrophobic adsorbent particles, and —eluting the catalyst from the adsorbent particles with an organic solvent.

Abstract: A catalyst is recovered from an aqueous reaction mixture comprising heterocyclic nitroxyl catalyst and oxidized cellulose, by: —separating the oxidized cellulose from the reaction mixture, —contacting the reaction mixture with solid hydrophobic adsorbent particles with particle sizes below 350, preferably below 200 ?m, more preferably below 100 ?m, said particles being silica particles provided with functionnalized hydrophobicity, —adsorbing the catalyst to the hydrophobic adsorbent particles, and—eluting the catalyst from the adsorbent particles with an organic solvent.