This paper describe preparation of catalysts Fe 2 O 3 / Ac and Pd/ Ac by precipitation method according to the ratio cat : Ac (20:80) and evaluates their catalytic activity to remove sulfur compounds from hydrotreated gas oil. The chemical structure of the prepared catalysts were examined by X-ray diffraction (XRD) analysis, atomic absorption spectroscopy (AAS), surface area and pore volume, and thermal gravimetric analysis (TGA). X-ray fluorescence spectrometer used to determine the content of sulfur in gas oil before and after the treatment. The catalysts in this study showed an efficient removal of sulfur compounds from light gas oil reaches to more than 60% Keywords: Oxidative desulfurization, Hydrotreated gas oil, Ferric oxide over active carbon catalyst, Palladium over active carbon catalyst.

Organotin(IV) complexes recently have been receiving great attention due to their stability with a unique structure, physical and chemical properties. There are many applications, the organotin(IV) can be used as catalysts, antifouling agents, UV-and heat stabilizers, anticorrosion, anticancer and antimicrobial activities. This review summarizes the synthesis methods, characterization and biological activities of organotin(IV) thiosemicarbazones derivatives with their activities as anticancer and antimicrobial agents.

Graphite nanoparticles were successfully synthesized using mixture of H2O2/NH4OH with three steps of oxidation. The process of oxidations were analysis by XRD and optics microscopic images which shows clear change in particle size of graphite after every steps of oxidation. The method depend on treatments the graphite with H2O2 in two steps than complete the last steps by reacting with H2O2/NH4OH with equal quantities. The process did not reduces the several sheets for graphite but dispersion the aggregates of multi-sheets carbon when removed the Van Der Waals forces through the oxidation process.