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[Ti(OC4H9)4/2,5-Dimethoxytetrahydrofuran/ TEA/Ethylene Chlorobromide] as a Novel Homogeneous Catalyst System Effective for the Ethylene Dimerization Reaction
Abstract:In the present research, the titanium-catalyzed ethylene dimerization and more specifically, the concomitant byproducts and polymer formation have been studied in the presence of 2,5-dimethoxytetrahydrofuran as an electron donor compound in the combination with triethylaluminium (TEA) as activator. Then, we added ethylene chlorobromide as a new efficient promoter to the relevant catalyst system. Finally, the behavior of novel homogeneous [Titanium tetrabutoxide (Ti(OC4H9)4)/2,5-dimethoxytetrahydrofuran/ TEA/ethylene chlorobromide] was investigated in the various operating conditions for the optimum production of 1-butene. In the optimum conditions, a very high ethylene conversion (almost 90.77 %), a relative high selectivity to 1-butene (79.00 %), yield of reaction equal to 71.70 % and a significant productivity (turnover frequency equal to 1370 h-1) were achieved.
Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1079350Procedia APA BibTeX Chicago EndNote Harvard JSON MLA RIS XML ISO 690 PDF Downloads 1728
 G. P. Blov, P. E. Mathkovsky, "Process for the production of higher ╬▒- olefins", Petrol. Chem., vol. 50, 2010, pp. 283-289.
 A. W. Al-Sadoun, "Dimerization of ethylene to butene-1 catalyzed by Ti (OR-) 4-AlR3", Appl. Catal. A: General, vol. 105, 1993, pp. 1-40.
 A. M. Al-Jaralleh, J. A. Anabtawi, M. A. B. Siddiqui, A. M. Aitani, "Ethylene dimerization and oligomerization to butene-1 and linear alphaolefins; A review of catalytic system and processes", Catal. Today, vol. 14, 1992, pp. 1-124.
 V. I. Zhukov, G. V. Val kovich, B. N. Shorik, Yu. M. Petrov., G. P. Blov, "Selective dimerization of ethylene to butene-1 under the conditions of industrial process, I. Influence of temperature and pressure on the rate of the process in a bubbling type reactor", Russ. J. Appl. Chem., vol. 80, 2007, pp. 1195-1200.
 S. M. Pillai, G. L. Tembe, M. Ravindranathan, S. Sivaram, "Dimerization of ethylene to 1-butene catalyzed by titanium alkoxidetrialkylaluminum system", Ind. Eng. Chem. Res., vol. 27, 1988, pp. 1971-1977.
 H. K. Leo, D. G. Li, S. Li, "The effect of halide and the coordination geometry of chromium center in homogeneous catalyst system for ethylene trimerization", Mol. Catal. A: Chemical, vol. 221, 2004, pp. 9-17.
 H. Mahomed, A. Bollmann, J. T. Dixon, V. Gokuln, L. Griesel, C. Grove, F. Hess, H. Maumela, L. Pepler, "Ethylene trimerization catalyst based on substituted cyclopentadienes", Appl. Catal. A: General, vol. 193, 2003, pp. 355-359.
 Y. Yang, H. Kim, J. Lee, H. Paik, H. G. Jang, "Roles of chloro compound in homogeneous
[Cr(2-ethyhexanoate)3/2,5-dimethylpyrrole/ triethylaluminum/chloro compound] catalyst sysytem for ethylene trimerization", Appl. Catal. A: General, vol. 193, 2000, pp. 29-38.
 H. Chen, X. Liu, W. Hu, Y. Ning, T. Jian, "Effects of halide in homogeneous Cr(III)/PNP/MAO catalytic systems for ethylene tetramerization toward 1-octene", Mol. Catal. A: Chemical, vol. 270, 2007, pp. 273-277.
 F. A. Carey, R. J. Sunderberg, "Advanced Organic Chemistry", 3rd ed. part A: structure and mechanisms, Plenum Press, New York, 1990, ch. 3, p. 144.
 E. Killian, K. Blann, A. Bollmann, J. T. Dixon, S. Kuhlmann, M. C. Maumela, H. Maumela, D. H. Morgan, P. Nongodlwana, M. J. Overett, M. Pretorius, K. Höfener, P. Wasserscheid, "The use of bis(diphenylphosphino) amines with N-aryl functionalities in selective ethylene tri- and tetramerisation", Mol. Catal. A: Chemical, vol. 270, 2007, pp. 214-218.
 H. T. Jiang, Y. Ning, B. Zhang, J. Li, G. Wang, J. Yi, Q. Huang, "Preparation of 1-octene by the selective tetramerization of ethylene", Mol. Catal. A: Chemical, vol. 259, 2006, pp. 161-165.
 C. P. Christenson, J. A. May, L. E. Freyer in R. P. Quirk (editor), "Transition metal catalyzed polymerization: alkenes and dienes", Harwood Academic, New York, 1983, p. 763.
 T. W. Woo, S. I. Woo, "Kinetics study of ethylene dimerization catalyzed over Ti (O-nC4H9)4/AlEt3" , J. Catal., vol. 132, 1991, pp. 68-78.