Codimerization of Propylene with Ethylene over Phosphotungustic Acid-Alumina Catalyst

Abstract

Codimerization of propylene with ethylene on alumina and silica-alumina catalysts containing phosphoric acid, various phoshates, phosphotungustic acid and nickel oxide was investigated, Both in the pulse and continuous-flow reactions over phosphotungstic acid-alumina (PW-A1203)catalyst, high selectivity to isopentenes in pentenes (80-90%) was obtained. A correlation was recegnized between the acid amount with the acid strength being less than -5.6 of PWA1203 catalyst and its activity for codimerization.