Castor oil dehydration kinetics

Abstract

AbstractThe dehydration reaction kinetics of castor oil was investigated with sodium bisulfate‐sodium bisulfite mixture (SB‐SB) or p‐toluenesulfonic acid as catalyst. Reactions were carried out at 210, 220, and 230°C, and a kinetic model was determined for each case. The reactions with SB‐SB catalyst at 210 and 220°C and with p‐toluenesulfonic acid at 210°C followed second‐order kinetics. A first‐order rate equation showed the best fit to the experimental data for the reaction with SB‐SB at 230°C. p‐Toluenesulfonic acid‐catalyzed reactions at 220 and 230°C were also first‐order reactions. Additionally, some mathematical equations were derived between iodine value, refractive index, viscosity, and reaction time.