Process for the separation of hydrocarbons from a mixed feedstoc

Details Process for the separation of hydrocarbons from a mixed feedstoc Process for the separation of hydrocarbons from a mixed feedstoc

1986-03-14

1987-05-12

Caldarola, Glenn

Mineral oils: processes and products

Fractionation

Distillation

208353, 208355, 208321, 203 25, 203 96, 203DIG14, C10G 708, C10G 700, B01D 338

Patent

active

046647864

ABSTRACT:
In a steam distillation process for the recovery of aromatic hydrocarbons wherein there is (i) a primary flash zone at the top of the distillation zone in which rich solvent is flashed and/or (ii) provision for the removal of side cut distillate vapors from about the middle of the distillation zone, the improvement comprising (a) heat exchanging flashed rich solvent vapors or side-cut distillate vapors with stripping water to provide stripping water vapors and stripping water at at least about the boiling point of water; (b) passing the stripping water vapors from step (a) to a steam ejector; (c) passing the stripping water from step (a) to a motive steam generator wherein the stripping water is vaporized under pressure; (d) passing the stripping water vapors from step (c) to the steam ejector referred to in step (b); and (e) passing the stripping water vapors, introduced into the steam ejector in accordance with steps (b) and (d), to the lower half of the distillation zone.

REFERENCES:
patent: 3037062 (1962-05-01), Gerhold
patent: 3151046 (1964-09-01), Larson
patent: 3179708 (1965-04-01), Penisten
patent: 3494861 (1970-02-01), Munro
patent: 3702295 (1972-11-01), Thompson
patent: 4175034 (1979-11-01), Thompson
patent: 4260476 (1981-04-01), Vidueira et al.
patent: 4261814 (1981-04-01), Pfeifer
patent: 4415443 (1983-11-01), Murphy

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