Title of article :
Antioxidant Additives for Lubricating Oils. Synthesis and Evaluation of some Polyfunctionalized Phenols Linked to Heterocycles
Author/Authors :
EL Ashry, El Sayed H. Alexandria University - Faculty of Science - Chemistry Department, Egypt , El-Rafi, Mohamed E. Alexandria University - Institute of Graduate Studies and Research - Materials Science Department, Egypt , Elnagdi, Mohamed H. Cairo University - Faculty of Science - Chemistry Department, Egypt , Abou-Elnaga, Hamdy H. Consultant of Petroleum and Petrochemical Industries, Egypt , Abdel Azime, Wedad M.A. Research Centre - Misr Petroleum Company, Egypt , Boghdadi, Yasser M. Research Centre - Misr Petroleum Company, Egypt
Abstract :
The polyfunctionalized Phenols Linked to heterocyclic derivatives, 6-Amino-3-ethyl-4-(4- hydroxy-3-methoxyphenyl)-1-phenyl-4H-pyrano[3,2-d]pyrazole-5-carbonitrile (3), Methyl-6- amino-5-cyano-2-ethyl-4-(4-hydroxy-3-methylphenyl)-4H-pyran-3-carboxylate (4), 5-Amino-7-(4- hydroxy-3-methoxyphenyl)-2-methyyl-4,7,7a-trihydropyrazolo[1,5-a]pyrimidine-6-carbonitrile (5) and 3-Amino-1-(4-hydroxy-3-methoxyphenyl)-4H-benzo[f]chromene-2-carbonitrile (6) were synthesized. The antioxidants activities of different dosages of these compounds 3-6, using the turbine base oil with viscosity grade ISO 46, were evaluated. Oxidation test (RBOT) according to IP 229 was applied and the optimum dosage of the promising compound was determined. The formulated blend containing 1.6 % wt. of compound 3 gave higher oxidation stability than a blend containing 0.8 % wt. of international commercial antioxidant additive (IA).
Keywords :
Phenols , Pyranopyrazole , Antioxidants , Turbine oil
Journal title :
Jordan Journal of Chemistry
Journal title :
Jordan Journal of Chemistry
