1. Refining Division, Egyptian Petroleum Research Institute (EPRI), Cairo, Egypt
2. Chemical production department, Cairo Oil Refining Company (CORC), Mostorod-Cairo, Egypt
3. Advanced Technology and New Materials Institute, City of Scientific Research and Technology Applications, New Borg El-Arab City, Alexandria, Egypt
4. Chemistry Department, Faculty of Science, Ain Shams University, Cairo, Egypt
5. Department of Chemistry, Faculty of Science, King Khalid University, Abha, Saudi Arabia