Elsevier

Journal of Catalysis

Volume 67, Issue 1, January 1981, Pages 159-174
Journal of Catalysis

Selective alkylation of toluene with methanol to produce para-Xylene

https://doi.org/10.1016/0021-9517(81)90269-4Get rights and content

Abstract

Toluene has been alkylated with methanol over ZSM-5-class zeolite catalysts to produce xylenes and water. A near equilibrium mixture containing 24% of the para isomer was usually observed. Production of over 90% para isomer in the xylene product was achieved when the catalyst was modified by impregnation with phosphorus and with boron compounds. para-Xylene selectivity was also enhanced by coking and coating the catalyst surface with heat-stable polymers. A controlled reduction in the effective dimensions of the catalyst pore openings, and/or channels, along with deactivation of acidic surface sites, has been proposed as a mechanism for the selective production of p-xylene.

References (23)

  • P.B. Venuto et al.

    J. Catal.

    (1966)
  • T. Yashima et al.

    J. Catal.

    (1970)
  • W.J. Taylor et al.

    J. Res. Nat. Bur.

    (1946)
  • P.B. Weisz et al.

    J. Phys. Chem.

    (1960)
  • C.D. Chang et al.

    J. Catal.

    (1977)
  • G.T. Kokotailo et al.

    Nature

    (1978)
  • S.M. Csicsery

    J. Catal.

    (1970)
  • S.M. Csicsery

    J. Catal.

    (1971)
  • W.M. Meier et al.
  • A.L. Waddams

    Chemicals from Petroleum

    A.L. Waddams

    Chemicals from Petroleum

  • A. Schriesheim
  • Cited by (586)

    View all citing articles on Scopus
    1

    Present address: 9 Lindsay Drive, Morganville, N.J. 07751.

    2

    Present address: Mobil Research and Development Corporation, Paulsboro, N.J. 08066.

    View full text