“…Homogeneous, serf-catalyzed reactions such _s esterifications, transesterifications and hydrolysis reactions being the biggest culprits. The advantages of combining reaction with distillation were recognized long ago (Backhaus (1921a(Backhaus ( , 1921b(Backhaus ( , 1921c(Backhaus ( , 1921d(Backhaus ( , 1922a(Backhaus ( , 1922b(Backhaus ( , 1922c(Backhaus ( , 1922d(Backhaus ( , 1922e, 1923a(Backhaus ( , 1923b, Keyes (1932), Carney (1937), McKeon et al (1940), McKeon (1940), Langtin and Randall (1942), Leyes and Othmer (1945), Berman et al (1948), Belck (1955), Corson et al (1956), Hofmann (1958), Schoenemann (1958), Corrigan and Ferris (1969), Saito et al (197i)) but the idea did not manage to capture the imagination of chemical engineers beyond aficionados of the subject. In recent years, however, a growing number of clever and determined engineers have designed and built commercial distillation systems in which chemical reactions are deliberately introduced in order to achieve the process goals.…”