4.7 Article

Synthesis of campholenic aldehyde from α-pinene using bi-functional PrAlPO-5 molecular sieves

Journal

Publisher

ELSEVIER SCIENCE BV
DOI: 10.1016/j.jtice.2016.02.028

Keywords

PrAlPO-5; Bi-functional catalyst; alpha-Pinene; Epoxidation; Campholenic aldehyde

Funding

  1. Korea CCS RD Centre
  2. Ministry of Education, Science and Technology of the Korean Government

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Praseodymium incorporated AlPO-5 was synthesized hydrothermally in fluoride medium using triethylamine as template. PrAlPO-5 could be bi-functional in nature since the isolated praseodymium sites acted both as redox and acid sites. The framework incorporation of praseodymium in AlPO-5, and the absence of separate praseodymium oxide phase were confirmed by laser Raman and fluorescence studies. The chemisorbed oxygen on praseodymium sites were identified by ESR. The ex-situ pyridine adsorbed IR spectrum confirmed the presence of Lewis acid sites. The catalytic activity of PrAlPO-5 was evaluated in the synthesis of campholenic aldehyde from alpha-pinene. The epoxidation of alpha-pinene through chemisorbed oxygen followed by isomerisation of alpha-pinene oxide over Lewis acid sites on PrAlPO-5 yielded campholenic aldehyde selectively. PrAlPO-5 was proved to be an active, selective and reusable catalyst. (c) 2016 Taiwan Institute of Chemical Engineers. Published by Elsevier B.V. All rights reserved.

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