Akademik Veri Yönetim Sistemi
CHEMICAL ENGINEERING JOURNAL AND THE BIOCHEMICAL ENGINEERING JOURNAL, cilt.53, sa.3, ss.173-181, 1994 (SCI-Expanded)
Isopropylnaphthalenes (IPNs), produced by the alkylation of naphthalene with propene, are commercially important as chemical intermediates and multipurpose solvents. The effects of reaction temperature (30-60-degrees-C), initial naphthalene concentration (0.60-3.00 M), catalyst holdup (0.007-0.036), propene partial pressure (0.24-1.0 bar), propene feed rate (0.53-20.00 mol dm-3 h-1) and agitation rate (650-1100 min-1) on the production of IPN from naphthalene (dissolved in cyclohexane) and propene with BF3.H3PO4 liquid catalyst in a semi-batch gas-liquid-liquid/catalytic system were investigated. The main products of the alkylation reactions were IPNs and diisopropylnaphthalenes (DIPNs). At reduced naphthalene concentrations the reactions obeyed the slow reaction regime and the experimental data were in agreement with the theoretical model. An increase in naphthalene concentration increased the maximum IPN yield which was 0.60 at 50-degrees-C and 1.12 M initial naphthalene concentration. Temperatures above 50-degrees-C and a catalyst holdup of greater than 0.022 did not affect the maximum IPN yield significantly. Increases in the agitation rate, propene feed rate and partial pressure increased the observed reaction rates without affecting the IPN yield.