Process for the separation of hydrocarbons from a mixed...

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

B - Operations, Transporting

01

D

202/91

B01D 3/38 (2006.01) C07C 7/05 (2006.01)

Patent

CA 1295966

- 23 - PROCESS FOR THE SEPARATION OF HYDROCARBONS FROM A MIXED FEEDSTOCK 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 seam 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 (a) 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. D-14,627-1

518572

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