Process for purifying benzene and toluene by extractive azeotrop

Details Process for purifying benzene and toluene by extractive azeotrop Process for purifying benzene and toluene by extractive azeotrop

1978-03-08

1979-09-18

Bascomb, Jr., Wilbur L.

Distillation: processes, separatory

With measuring, testing or inspecting

Of temperature or pressure

203 53, 203 60, 203 84, 203 85, 585834, 585862, B01D 336, C07C 706, C07C 708

Patent

active

041682092

ABSTRACT:
Process for separating benzene and/or toluene from mixtures thereof with saturated hydrocarbons, by extractive distillation using an aliphatic N-alkylamide as extraction solvent, comprising introducing in the distillation column, above the level of introduction of the extraction solvent, liquid water in an amount and under such conditions that said water is completely vaporized without substantially diluting the solvent, condensing the vapors discharged from the top of the column and dividing the resulting condensate into a phase of liquid saturated hydrocarbons, and a phase of water.

REFERENCES:
patent: 2022809 (1935-12-01), Kramer
patent: 2684326 (1954-07-01), Boyd
patent: 2742411 (1956-04-01), Leary et al.
patent: 3884769 (1975-05-01), Mikitenko et al.

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