Acoustic measurements of critical points for four-component mixtures in hydroformylation reactions in carbon dioxide

Abstract

A simple acoustic technique has been used to study the vapour–liquid critical points of the reaction mixtures of hydroformylation in carbon dioxide. The systems CO 2+CO+H 2+propene and CO 2+CO+H 2+hex-1-ene have been investigated. These two quaternary systems were measured by the pseudo-binary approach (i.e. the ratio of alkene, CO and H 2 being held constant). The effects of the solutes (alkene, CO and H 2) on the critical points in the CO 2-rich fluids are discussed.