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acetic acetone acetonitrile acid adduct adsorption alcohol aldehydes alkaline alloys analysis aqueous aromatic asphaltenes band behaviour benzaldehyde benzene boiling Cairo University Calcd calculated carbon catalyst Chem chemical Chemistry chloride coke colour colourless complexes compounds concentration condensed constant conversion corresponding corrosion crude oil crystallized curves decomposition EDTA effect Egypt electrode epoxidized equation ethanol ether ethyl ethylene Experimental extraction Faculty of Science film thickness filtered formation Found fraction furfural give graft polymerization hydrazine hydrocarbon hydrogen hydroxide increase indicate investigation ions isomerization Jalo kinetic ligand lignin m-xylene metal method microcatalytic molecule monomer NaOH National Research Centre obtained oxide perchlorate phosphites polyethylene polymer potential present protons pyrazolones pyridine ratio reaction mixture reagent resins Results and Discussion revised form samples Shams showed sodium solution solvent spectra spectrum structure studied sulphur Table titration toluene triphenylphosphine values xylene yield zeolite