Effect of pH on rate and selectivity behavior in biphasic hydroformylation of 1-octene

Deshpande, R.M. and Purwanto, P. and Delmas, H. and Chaudari, R.V. (1997) Effect of pH on rate and selectivity behavior in biphasic hydroformylation of 1-octene. Journal of Molecular Catalysis A: Chemical, 126 (2-3). pp. 133-140. ISSN 1381-1169

[img]
Preview
PDF - Published Version
94Kb

Official URL: http://dx.doi.org/10.1016/S1381-1169(97)00103-9

Abstract

The effect of pH on activity and selectivity of (RhCl(COD)2/TPPTS catalyzed hydroformylation of 1-octene in a biphasic medium has been studied. The pH of the aqueous catalyst phase shows a strong influence on the rate of reaction and n/iso ratio of the aldehyde products. The effect of P/Rh ratio, catalyst and 1-octene concentration, partial pressure of hydrogen and carbon monoxide was studied at 7 and 10 pH, which showed significantly different trends. The rates increased by two- to five fold when the pH was changed from 7 to 10. While the dependence of the rate was found to be linear on the olefin and hydrogen concentration at both 7 and 10 pH, the rate of hydroformylation was found to be inhibited with increase in catalyst concentration beyond 1 × 10−3 kmol m−3. The effect of partial pressure of carbon monoxide was linear at pH 7 whereas at pH 10 a substrate inhibited kinetics was observed.

Item Type:Article
Subjects:T Technology > TP Chemical technology
Q Science > QD Chemistry
Divisions:Faculty of Engineering > Department of Chemical Engineering
Faculty of Engineering > Department of Chemical Engineering
ID Code:180
Deposited By:Dr. Istadi I.
Deposited On:14 May 2009 09:19
Last Modified:14 May 2009 09:19

Repository Staff Only: item control page