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    • Alkylation of toluene with isopropyl alcohol over SAPO-5 catalyst

      Sreedevi Upadhyayula

      Full Papers Volume 121 Issue 2 March 2009 pp 199-207

    • Fulltext

       

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      Permanent link:
      https://www.ias.ac.in/article/fulltext/jcsc/121/02/0199-0207

    • Keywords

       

      Cymene; 𝑝-cymene; isopropylation; toluene; SAPO-5.

    • Abstract

       

      Isopropylation of toluene with isopropyl alcohol was studied over the large pore silicon alumino phosphate molecular sieves (SAPO-5) with varying Si content. Toluene conversion was found to increase with increase in the Si of the catalysts. The effect of temperature on yields of cymene was studied in the range of 453 to 553 K. The highest yield and selectivity for cymene was observed at 513 K. Good cymene selectivity was confirmed with the absence of 𝑛-propyl toluene in the product. The catalyst activity, in terms of 𝑝-cymene selectivity, remained almost stable during a nine hour time on stream run. Enhanced cymene selectivity and decreased 𝑝-cymene selectivity was observed with increase in the toluene to isopropyl alcohol feed mole ratio from 2 to 8. Power law model and L-H-H-W model fitted the experimental data well and are used to explain the kinetics of this reaction.

    • Author Affiliations

       

      Sreedevi Upadhyayula1

      1. Department of Chemical Engineering, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110 016

    • Dates

       
      Published
      March 2009
      Manuscript received
      25 August 2008
      Manuscript revised
      11 December 2008

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