Distillation: processes – separatory – Distilling to separate or remove only water – From organic compound
Patent
1981-04-16
1982-08-03
Bascomb, Jr., Wilbur L.
Distillation: processes, separatory
Distilling to separate or remove only water
From organic compound
203 39, 203 53, 203 60, 203 68, 203 69, 203 70, 203 82, 203 83, 203 97, 203DIG13, 568916, B01D 336, C07C 2982, C07C 3108
Patent
active
043426271
ABSTRACT:
The present invention relates to a continuous process for producing substantially anhydrous alcohols from aqueous solutions thereof by distilling a mixture of aqueous alcohol and an entrainer to a drying column withdrawing an azeotrope as a distillate and continuously recovering anhydrous alcohol with less than 0.1% by weight of water from the base of the drying column. The improvement resides in feeding the distillate to a condenser and introducing (a) the condensate therefrom in a substantially non-turbulent state into a decanter at a point close to the interface between the aqueous and organic phases present therein and (b) a specified amount of water, which is less than 0.25 volumes per volume of the anhydrous alcohol recovered, into the drying column at a point adjacent to that at which the organic hydrocarbon phase is returned as reflux. The main advantage of the process is that it gives considerable energy savings, is flexible with regard to the entrainer used and can be incorporated in existing plants.
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patent: 4256541 (1981-03-01), Muller et al.
Cane Charles
Yeomans Bertram
Bascomb, Jr. Wilbur L.
BP Chemicals Limited
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