Distillation: processes – separatory – Adding material to distilland except water or steam per se – At least two materials
Patent
1986-01-27
1987-09-22
Bascomb, Wilbur
Distillation: processes, separatory
Adding material to distilland except water or steam per se
At least two materials
203 56, 203 57, 203 60, 203 64, 560248, B01D 340, C07C 6748
Patent
active
046953507
ABSTRACT:
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.
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patent: 4379028 (1983-04-01), Berg et al.
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