Afify, A., Kandile, N., Badawi, A., Solyman, S., Betiha, M. (2017). Catalytic Aerobic Oxidation System via Terephthalic Acid Production Using Economic and Readily Available Nanocatalyst. test, 34(part1), 625-641. doi: 10.21608/jsrs.2018.14115
Ahmed S. Afify; nadia G. Kandile; A. M. Badawi; Sanaa M. Solyman; Mohamed A. Betiha. "Catalytic Aerobic Oxidation System via Terephthalic Acid Production Using Economic and Readily Available Nanocatalyst". test, 34, part1, 2017, 625-641. doi: 10.21608/jsrs.2018.14115
Afify, A., Kandile, N., Badawi, A., Solyman, S., Betiha, M. (2017). 'Catalytic Aerobic Oxidation System via Terephthalic Acid Production Using Economic and Readily Available Nanocatalyst', test, 34(part1), pp. 625-641. doi: 10.21608/jsrs.2018.14115
Afify, A., Kandile, N., Badawi, A., Solyman, S., Betiha, M. Catalytic Aerobic Oxidation System via Terephthalic Acid Production Using Economic and Readily Available Nanocatalyst. test, 2017; 34(part1): 625-641. doi: 10.21608/jsrs.2018.14115

Catalytic Aerobic Oxidation System via Terephthalic Acid Production Using Economic and Readily Available Nanocatalyst

Journal of Scientific Research in Science
Article 25, Volume 34, part1, September 2017, Pages 625-641    PDF (1009.73 K)
Document Type: Original Article
DOI: 10.21608/jsrs.2018.14115
Authors
Ahmed S. Afify* 1; nadia G. Kandile2; A. M. Badawi3; Sanaa M. Solyman4; Mohamed A. Betiha5
1Egyptian Petroleum Research Institute, Nasr City, Cairo 11727, Egypt.
2Chemistry Department Faculty of Women, Ain shams University,Heliopolis,Cairo,Egypt
3Egyptian Petroleum Research Institute, Nasr City, Cairo 11727, Egypt
4Egyptian Petroleum Research Institute, Nasr City, Cairo 11727, Egypt. AL-Ghad International College for Applied Medical Science, Kingdom of Saudi Arabia.
5Egyptian Petroleum Research Institute, Nasr City, Cairo 11727, Egypt. Egypt nanotechnology center (EGNC) Cairo university, El-Shiekh Zayed, 12588, Egypt.
Abstract
One of the most important commercials industrial processes is liquid phase catalytic oxidation of p-xylene by oxygen for terephthalic acid (TPA) production. A recent catalytic system used environmentally benign N-hydroxyamide as a free radical promoter rather than more hazardous bromine molecules. An economical and easily prepared heterogeneous oxidation catalyst, nanorods manganese dioxide, was synthesized by ultrasonic technique. The crystal structure and morphology of the MnO2 were confirmed by HRTEM, XRD, and N2-adsorption-desorption isotherms. The prepared MnO2 nanorods had a high aspect ratio and surface area of 300 m2 g-1.  The catalytic oxidation of p-toluic acid (PTA) to terephthalic acid using MnO2 nanorods was studied under the different conditions (reaction time, catalyst dosages, reaction solvent and varied pressures and temperatures) to control the yield and selectivity toward TPA synthesis.  The obtained results showed that the high yield (88.9%) and conversion (90.1%) in ethyl acetate with fixed oxygen pressure (20 atm) at 150°C.
 
Keywords
MnO2; nanorods; catalytic oxidation; terephthalic acid (TPA)
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