Kinetics of hydroformylation of 1-octene in ionic liquid-organic biphasic media using rhodium sulfoxantphos catalyst

TitleKinetics of hydroformylation of 1-octene in ionic liquid-organic biphasic media using rhodium sulfoxantphos catalyst
Publication TypeJournal Article
Year of Publication2011
AuthorsDeshpande, RM, Kelkar, AA, Sharma, A, Julcour-Lebigue, C, Delmas, H
JournalChemical Engineering Science
Volume66
Issue8
Pagination1631-1639
Date PublishedAPR
ISSN0009-2509
KeywordsBiphasic catalysis, Butylpyridinium tetrafluoroborate, kinetics, Parameter identification, Reaction engineering, solubility
Abstract

Biphasic hydroformylation of 1-octene was performed using rhodium sulfoxantphos catalyst dissolved in [BuPy][BF(4)] ionic liquid. Preliminary experiments proved this system to retain the catalytic complex within the ionic liquid phase and to maintain a high selectivity towards the linear aldehyde (n:iso ratio of 30) over several cycles. Process parameter investigation showed a first order dependence of the initial rate with respect to the catalyst and 1-octene concentrations, but a more complex behavior with respect to hydrogen (fractional order) and carbon monoxide partial pressures (inhibition at high pressures). Different mathematical models were selected based on the trends observed and evaluated for data fitting. Also, rate models were derived from a proposed mechanism, using Christiansen matrix approach. To calculate concentrations of substrates in the catalytic phase as required by this kinetic modeling, solubility measurements were preformed for the gases (pressure drop technique), as well as for 1-octene and n-nonanal (thermogravimetry analysis). (C) 2011 Elsevier Ltd. All rights reserved.

DOI10.1016/j.ces.2010.12.040
Type of Journal (Indian or Foreign)

Foreign

Impact Factor (IF)

3.23

Divison category: 
Chemical Engineering & Process Development