title: Oxidation of phenol by hydrogen peroxide catalyzed by metal-containing poly(amidoxime) grafted starch.
abstract: Polyamidoxime chelating resin was obtained from polyacrylonitrile (PAN) grafted starch. The nitrile groups of the starch-grafted polyacrylonitrile (St-g-PAN) were converted into amidoximes by reaction with hydroxylamine under basic conditions. The synthesized graft copolymer and polyamidoxime were characterized by FTIR, TGA and elemental microanalysis. Metal chelation of the polyamidoxime resin with iron, copper and zinc has been studied. The produced metal-polyamidoxime polymer complexes were used as catalysts for the oxidation of phenol using H(2)O(2) as oxidizing agent. The oxidation of phenol depends on the central metal ion present in the polyamidoxime complex. Reuse of M-polyamidoxime catalyst/H(2)O(2) system showed a slight decrease in catalytic activities for all M-polyamidoxime catalysts.
authors: Petrochemical Research Chair, Department of Chemistry, College of Science, King Saud University, Riyadh, Saudi Arabia. helhamshary@ksu.edu.sa
authors: Hany
authors: H
authors: El-Hamshary
authors: Mohamed H
authors: MH
authors: El-Newehy
authors: Salem S
authors: SS
authors: Al-Deyab
mesh_terms: D002384:Catalysis; D006861:Hydrogen Peroxide / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D008670:Metals / Q000737:chemistry*; D009942:Organometallic Compounds / Q000737:chemistry*; D010084:Oxidation-Reduction; D019800:Phenol / Q000737:chemistry*; D011108:Polymers / Q000138:chemical synthesis / Q000737:chemistry; D059027:Recycling; D012117:Resins, Synthetic / Q000138:chemical synthesis / Q000737:chemistry; D017550:Spectroscopy, Fourier Transform Infrared; D013213:Starch / Q000138:chemical synthesis / Q000737:chemistry*; D013696:Temperature; D013818:Thermogravimetry
chemical_list: D008670:Metals; D009942:Organometallic Compounds; D011108:Polymers; D012117:Resins, Synthetic; D019800:Phenol; D013213:Starch; D006861:Hydrogen Peroxide