05348624 is referenced by 4 patents and cites 16 patents.

For separating ETBE and ethanol the following principal stages are employed:

(1) Extraction of ethanol by water, the raffinate being ETBE saturated in water and the extract an ethanol/water mixture containing a small proportion of ETBE;

(2) Concentration of the above mixture, the distillate being a mixture close to the ethanol/water azeotrope in composition and containing a very small proportion of ETBE;

(3) Heteroazeotropic distillation of this distillate in two coupled columns with an overhead decanter, this distillation using ETBE as azeotroping agent; the residue of the first column being ethanol which is ca. 99% by mole and the residue of the second column being practically pure water, this water and the water recovered during the concentration stage being used as extraction solvent in stage (1).

Stage (3) may be an ethanol dehydration unit using ETBE as dehydrating agent.

Title
Process for separating ethyl tert-butyl ether and ethanol
Application Number
7/974763
Publication Number
5348624
Application Date
November 12, 1992
Publication Date
September 20, 1994
Inventor
Massimo Zuliani
Rueil Malmaison
FR
Paul Mikitenko
Noisy le Roi
FR
Annick Pucci
Croissy sur Seine
FR
Agent
Millen White Zelano & Branigan
Assignee
Institut Francais du Petrole
FR
IPC
B01D 3/34
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