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Comparison of Vanadium Oxide Catalysts for Synthesis of Benzene: Benzene Purity, Yields and Reconditioning Methods

Published online by Cambridge University Press:  18 July 2016

T. B. Enerson ,
Herbert Haas ,
Kaveh Zarrabi  and
R. L. Titus
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Abstract

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This study compares vanadium oxide catalysts from three different sources: Noakes (N), Harshaw Chemical (H) and Kh. Arslanov at the St. Petersburg State University, Russia (R). The catalysts are used to convert acetylene to benzene in the last step of benzene synthesis. The organic purity of benzene in all three catalysts is high; 99.91–99.93% for (N) and (H) and 99.87% for (R). The benzene yields range from 90.0 to 94.3%. (N) averaged 92.6%, (H) averaged 91.1% and (R) averaged 92.0%. A conversion residue in the catalysts was analyzed for δ13C and found to be isotopically lighter relative to acetylene by −2.2% for (N) and (H) and −3.9% for (R). Benzene yields were studied on different reconditioning methods applied to all catalysts: heating to 400° in air averaged 92.3%; the same temperature with a half and half mixture of O2 and Ar averaged 91.9%, adding a half and half mixture of H2 and Ar at 200° to the end of this treatment averaged 91.8%. Based on this research, the obvious difference seen between the catalysts is in their trace by-products.

Type
Part 1: Methods
Information
Radiocarbon , Volume 40 , Issue 1: 16th International Radiocarbon Conference 16-20,1997 Groningen , 1997 , pp. 167 - 175
Copyright
Copyright © The American Journal of Science 

References

Coleman, D. D., Liu, C. L., Dickerson, D. R. and Frost, R. R. 1973 Improvement in trimerization of acetylene to benzene for radiocarbon dating with a commercially available vanadium oxide catalyst (Abstract). In Rafter, T. A. and Grant-Taylor, T., eds., Proceedings of the 8th International Conference on 14 C Dating . Wellington, New Zealand, Royal Society of New Zealand: 158.Google Scholar
Haas, H. 1995 Change of calibration parameters in frequently used vials in benzene scintillation counting. In Cook, G. T., Harkness, D. D., Miller, B. F. and Scott, E. M., eds., Proceedings of the 15th International 14C Conference. Radiocarbon 37(2): 737–742.CrossRefGoogle Scholar
Kessler, M. J. 1991 Applications of quench monitoring using transformed external standard spectrum (tSIE). In Ross, H., Noakes, , J. E. and Spaulding, J. D., Liquid Scintillation Counting and Organic Scintillators. Michigan, Lewis Publishing, Inc.: 343–364.Google Scholar
Noakes, J., Kim, S. and Akers, L. 1967 Recent improvements in benzene chemistry for radiocarbon dating. Geochimica et Cosmochimica Acta 31: 1094–1096.CrossRefGoogle Scholar
Noakes, J. E., Kim, S. M. and Stipp, J. J. 1965 Chemical and counting advances in liquid scintillation age dating. In Radiocarbon and Tritium Dating: Proceedings of the 6th International Conference on Radiocarbon and Tritum Dating, Washington State University, Pullman, Wash., June 7–11, 1965. Oak Ridge, Tennessee, U.S. Atomic Energy Commission: 650–652.Google Scholar
Seidov, Sh. I., Shamilov, T. O., Gashinova, T. M. and Zarbalieva, R. A. Zh. 1981 Zhurnal Analiticheskoi Khimii 36(6): 1225–1228.Google Scholar