Vapor phase alkylation of toluene using various alcohols over H3PO4/MCM-41 catalyst: Influence of reaction parameters on Vapor phase alkylation of toluene using various alcohols over H3PO4/MCM-41 catalyst: influence of reaction parameters on selectivity and conversion

A mesoporous MCM-41 molecular sieve material with a molar ratio of SiO2/Al2O3 = 70 and loaded with H3PO4 was used as a catalyst for the alkylation of toluene, using various alcohols, namely methanol, iso-propanol, and tert-butanol, as alkylating agents. Para-alkylated toluene was the predominant product, formation of which was enhanced by moderate temperature, low amounts of the alkylating agents in the feed, and high carrier gas flow rate. Time on stream was found to exert a profound effect on the selectivity and conversion to the different products.

Vapor phase alkylation of toluene using various alcohols over H3PO4/MCM-41 catalyst: Influence of reaction parameters on Vapor phase alkylation of toluene using various alcohols over H3PO4/MCM-41 catalyst: influence of reaction parameters on selectivity and conversion

A mesoporous MCM-41 molecular sieve material with a molar ratio of SiO2/Al2O3 = 70 and loaded with H3PO4 was used as a catalyst for the alkylation of toluene, using various alcohols, namely methanol, iso-propanol, and tert-butanol, as alkylating agents. Para-alkylated toluene was the predominant product, formation of which was enhanced by moderate temperature, low amounts of the alkylating agents in the feed, and high carrier gas flow rate. Time on stream was found to exert a profound effect on the selectivity and conversion to the different products.

___

  • Olah, G. A. (Ed.), Friedel Crafts and Related Reactions, John Wiley, New York, 1964.
  • Othmer, K. Encyclopedia of Chemical Technology, 3rd ed. 1978, 2, 50.
  • Cao, J.; He, N.; Li, C.; Dong, J.; Xu, Q. Stud. Surf. Sci. Catal. 1998, 117, 461-467.
  • Kresge, C. T.; Leonowicz, M. E.; Roth, W. J.; Vartuli, J. C.; Beck, J. S. Nature 1992, 359, 710-712.
  • Beck, J. S.; Vartuli, J. C.; Roth, W. J.; Leonowicz, M. E.; Kresge, C. T.; Schmitt, K. D.; Chu, C. T. W.; Olson, D. H.; Sheppard, E. W.; McCullen, S. B.; Higgins, J. B.; Schlenker, J. L. J. Am. Chem. Soc. 1992, 114, 10834-10843.
  • Behrens, G.; Stucky, G. D. Science 1993, 32, 696-699.
  • Feuston, B. P.; Higgins, J. B. J. Phys. Chem. 1994, 98, 4459-4462.
  • Corma, A.; Fornez, V.; Navarro, M.T.; Perez-Pariente, J. J. Catal. 1994, 148, 569-574.
  • Chen, C. Y.; Li, H. X.; Davis, M. E. Microporous Mater. 1993, 2, 17-26.
  • Chen, X.; Huang, L.; Ding, G.; Li, Q. Catal. Lett. 1997, 44, 123-126.
  • Stoylkova, T.; Matthae, P.; Bezouhanova, C.; Lechert, H.; Stud. Surf. Sci. Catal. 1998, 117, 429-436.
  • Armengol, E.; Cano, M. L.; Corma, A.; Garcia, H.; Navarro, M. T.; J. Chem. Soc. Chem. Commun. 1995, 519.
  • Armengol, E.; Corma, A.; Garcia, H.; Primo, J. Appl. Catal. A: Gen. 1995, 126, 391.
  • Armengol, E.; Corma, A.; Garcia, H.; Primo, J. Appl. Catal. A: Gen. 1997, 149, 411. Le, Q. N. US Patent 1993, 191, 134.
  • Gunnewegh, E. A.; Gopie, S. S.; Van Bekkum, H. J. Mol. Catal. A: Chem. 1996, 106, 151.
  • Van Bekkum, H.; Hoefnagel, A. J.; Van Koten, M. A.; Gunnewegh, E. A.; Vogt, A. H. G.; Kouwenhoven, H. W. Stud. Surf. Sci. Catal. 1994, 83, 379.
  • Kloetstra, K. R.; Van Bekkum, H. J. Chem. Res. 1995, 1, 26.
  • Condon, F. E. J. Am. Chem. Soc. 1949, 71, 3544.
  • Simons, J. H.; Hart, H. J. Am. Chem. Soc. 1947, 69, 679.
  • Schlatter, M. J.; Clark, R. D. J. Am. Chem. Soc. 1953, 75, 361.
  • Kirrmann, A.; Graves, M. Bull. Soc. Chim. France 1934, 5, 494.
  • (a) Beck, J. S.; Haag, W. O.; in: Ertl, G.; Knoezinger, H.; Weitkamp (Eds.), J. Handbook of Heterogeneous Catalysis, VCH, Weinheim, 1997, 2123.
  • (b) Tanabe, K.; Hoelderich, W. F.; Appl. Catal. A: Gen. 1999, 181, 399.
  • Ghiaci, M.; Abbaspur, A.; Kia, R.; Belver, C.; Trujillano, R.; Rives, V.; Vicente, M. A. Catalysis Communications , 8, 49. Parry, E. R. J. Catal. 1963, 2, 371.
  • Flego, C.; Kiricsi, I.; Perego, C.; Bellussi, G. Stud. Surf. Sci. Catal. 1995, 99, 2110.
  • Emeis, C. A. J. Catal. 1993, 141, 347.
  • Pai, S.; Gupta, U.; Chilukuri, S. J. Mol. Catal. A: Chem. 2007, 265, 109.
  • Inagaki, S.; Kamino, K.; Kikuchi, E. Appl. Catal. A: Gen. 2007, 318, 22.
  • Selvaraj, M.; Lee, T. G. Micropor. Mesopor. Mater. 2005, 85, 59.
  • Breen, J. P.; Burch, R.; Kulkarni, M.; McLaughlin, D.; Collier, P. J.; Golunski, S. E. Appl. Catal. A: Gen. 2007, , 53.
Turkish Journal of Chemistry-Cover
  • ISSN: 1300-0527
  • Yayın Aralığı: Yılda 6 Sayı
  • Yayıncı: TÜBİTAK
Sayıdaki Diğer Makaleler

Determination of trace element contents of Thymus species from Turkey

F. Zehra KÜÇÜKBAY, Ebru KUYUMCU

Reactions of 4-benzoyl-1,5-diphenyl-1H-pyrazole-3- carboxylic acid chloride with various hydroxylamines and carbazates

Elif KORKUSUZ, İsmail YILDIRIM

Ethyl 5-oxo-3-arylamino-2,5-dihydroisoxazole-4- carboxylates as sources of imidazopyrimidine and aminoindole derivatives

Ahmad POURSATTAR MARJANI, Jabbar KHALAFY

Determination of ceftriaxone, ceftizoxime, paracetamol, and diclofenac sodium by capillary zone electrophoresis in pharmaceutical formulations and in human blood serum

Amber SOLANGI, Saima MEMON, Arfana MALLAH, Najma MEMON

Biotransformation of danazol by Fusarium solani and Gibberella fujikuorii, and prolyl endopeptidase inhibition studies of transformed products

Muhammad Iqbal CHOUDHARY

Vapor phase alkylation of toluene using various alcohols over H3PO4/MCM-41 catalyst: Influence of reaction parameters on Vapor phase alkylation of toluene using various alcohols over H3PO4/MCM-41 catalyst: influence of reaction parameters on selectivity and conversion

Alireza ABBASPOURRAD, Roozbeh Javad KALBASI, Farzad ZAMANI

Comparative essential oil analysis of Geranium sylvaticum extracted by hydrodistillation and microwave distillation

Nuran KAHRİMAN, Gonca TOSUN, Hasan GENÇ, Nurettin YAYLI

An efficient and green approach for the synthesis of vinyl aryl ethers in the presence of guanidine hydrochloride

Robabeh BAHARFAR, Seyed Mohammad VAHDAT

Vapor phase alkylation of toluene using various alcohols over $H_3PO_4$/MCM-41 catalyst: influence of reaction parameters on selectivity and conversion

Alireza ABBASPOURRAD, Roozbeh Javad KALBASI, Farzad ZAMANI

Quantum chemical studies on tautomerism and basicity behavior of some 1,2,4-triazole derivatives

Cemil ÖĞRETİR, Yadigar GÜLSEVEN SIDIR, İsa SIDIR and Erol TAŞAL