n-Butene isomerization on acidic ion-exchange resin

D. Kalló, I. Preszler

Research output: Contribution to journalArticle

11 Citations (Scopus)


The selectivity during the n-butene interconversion depends neither on the fouling of a commercial silica-alumina cracking catalyst with a heterogeneous active surface, nor on the pressure between 32 and 750 torr over a SO3H resin (Amberlyst 15). These observations confirm the assumption of a common surface intermediate which presumably is the sec-butyl carbonium ion. Nevertheless, the selectivity can phenomenologically be given with high accuracy by the differential equations for a triangle reaction scheme involving first order steps. Formally identical equations can be derived on the assumption of a common intermediate. The rate constants for adsorption and desorption have been calculated from the kinetic equations. The activation energies are 13 kcal/mole for 1-butene adsorption, and 22 kcal/mole for desorption into 1-butene. The surface coverages can be determined, too, provided the sites of the resin are of the same activity. The values are between 0.1 and 0.9.

Original languageEnglish
Pages (from-to)1-4
Number of pages4
JournalJournal of Catalysis
Issue number1
Publication statusPublished - Sep 1968

ASJC Scopus subject areas

  • Catalysis
  • Physical and Theoretical Chemistry

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