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Journal of Chemical Sciences

, Volume 116, Issue 2, pp 107–113 | Cite as

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

  • K. Joseph Antony Raj
  • V. R. Vijayaraghavan
Article
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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

Keywords

Aluminophosphate AlPOs benzene cumene isopropylation molecular sieves 

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Copyright information

© Indian Academy of Sciences 2004

Authors and Affiliations

  1. 1.Department of Physical Chemistry, School of Chemical SciencesUniversity of MadrasChennaiIndia

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