Separation of n-hexyl acetate from n-hexyl alcohol by extractive distillation

摘要

n-Hexyl acetate cannot be completely removed from n-hexyl acetate- n- hexyl alcohol- water mixtures by distillation because of the presence of the minimum ternary azeotrope. n-Hexyl acetate can be readily removed from mixtures containing it, n-hexyl alcohol and water by using extractive distillation in which the extractive distillation agent is dimethylsulfoxide or a mixture of DMSO with a higher boiling organic compound. Typical examples of effective agents are DMSO; DMSO and tetraethylene glycol; DMSO, dimethylformamide and hexylene glycol.