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    • Isopropylation of benzene with 2-propanol over substituted large pore aluminophosphate-based molecular sieves

      K Joseph Antony Raj V R Vijayaraghavan

      Volume 116 Issue 2 March 2004 pp 107-113

    • Fulltext

       

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      Permanent link:
      https://www.ias.ac.in/article/fulltext/jcsc/116/02/0107-0113

    • Keywords

       

      Aluminophosphate; AlPOs; benzene; cumene; isopropylation; molecular sieves

    • Abstract

       

      Large pore aluminophosphate-based molecular sieves like AlPO4-5, MAPO-5, MnAPO-5 and ZAPO-5 were synthesised hydrothermally using triethylamine as a structure directing agent. These materials were characterised by X-ray diffraction (XRD),27A1 and31P MAS-NMR, ICP-MS,n-butylamine-TPD, BET and SEM. The catalytic performance of these materials was tested for isopropylation of benzene with 2-propanol at 250, 300, 350 and 400°C. The products were cumene,p-DIPB (p-diisopropylbenzene) andm-DIPB (m-diisopropylbenzene). MnAPO-5 was found to be more active than the other catalysts. Maximum conversion (20%) was noted at 350°C over MnAPO-5. The selectivity to DIPB was found to decrease with time on stream but the selectivity to cumene showed an increase after 3 h of time on stream

    • Author Affiliations

       

      K Joseph Antony Raj1 V R Vijayaraghavan1

      1. Department of Physical Chemistry, School of Chemical Sciences, University of Madras, Guindy Campus, Chennai - 600 025, India

    • Dates

       
      Published
      March 2004
      Manuscript received
      14 July 2003
      Manuscript revised
      10 November 2003

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