Applying the method of pressure swing distillation (PSD) we obtained (97 % v/v) ethanol starting from 95 % v/v ethanol, which shows that the ethanol-water azeotrope has been broken in this study. Experimental work to achieve the final product was carried out operating !he column in two stages or modes, these being: (1) Low pressure distillation (LPD), and (2) High pressure distillation (HPO). In the first operating mode, a low degree industrial alcohol (80 % v/v ethanol) is fed to a bench scale distillation column packed with Mellapack structure, where (95 % v/v) ethanol is obtained, working at atmospheric pressure. Then product collected in !he first stage is fed to the reboiler, and !he HPD process takes place to get 97 % (v/v) ethanol. Here we have shown that it is possible to perform the pressure swing using an auxiliary engineered device, instead of using a second distillation colum...

Applying the method of pressure swing distillation (PSD) we obtained (97 % v/v) ethanol starting from 95 % v/v ethanol, which shows that the ethanol-water azeotrope has been broken in this study. Experimental work to achieve the final product was carried out operating !he column in two stages or modes, these being: (1) Low pressure distillation (LPD), and (2) High pressure distillation (HPO). In the first operating mode, a low degree industrial alcohol (80 % v/v ethanol) is fed to a bench scale distillation column packed with Mellapack structure, where (95 % v/v) ethanol is obtained, working at atmospheric pressure. Then product collected in !he first stage is fed to the reboiler, and !he HPD process takes place to get 97 % (v/v) ethanol. Here we have shown that it is possible to perform the pressure swing using an auxiliary engineered device, instead of using a second distillation colum...