Distillation: processes – separatory – Adding material to distilland except water or steam per se – At least two materials
Patent
1987-03-02
1987-09-15
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 61, 203 64, 568913, B01D 340, C07C 2984
Patent
active
046937870
ABSTRACT:
t-Amyl alcohol and isobutanol cannot be separated from each other by distillation because of the proximity of their boiling points. t-Amyl alcohol can be readily separated form isobutanol by using extractive distillation in which the extractive agent is a higher boiling organic compound or a mixture of two or more of these. Typical examples of effective agents are: dimethylsulfoxide; dimethylsulfoxide and N,N-dimethylacetamide; dimethylsulfoxide, dimethylformamide and phthalic anhydride.
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Berg Lloyd
Shanahan Michael J.
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