Extractive distillation process and system
AssigneeUop LLC
InventorRobert J. L. Noe
Life of this patent
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Abstract
One exemplary embodiment can be a process for minimizing a solvent in a raffinate stream of an extractive distillation column. The process can include providing sufficient separation in the extractive distillation column between a reflux stream having an effective amount of water and a stream having an effective amount of solvent. Usually, the reflux stream has no more than about 2,000 ppm, by weight, solvent based on the weight of the reflux stream.
Claims17
A process for minimizing a solvent in a raffinate stream of an extractive distillation column, comprising:
- A) providing 2-20 tray separation in the extractive distillation column between a reflux stream comprising an effective amount of water and a stream comprising an effective amount of solvent wherein the reflux stream comprises no more than about 2,000 ppm, by weight, solvent based on the weight of the reflux stream, and wherein the reflux stream comprises at least about 99%, by weight, water based on the weight of the reflux stream.
A process for minimizing a solvent in a raffinate stream of an extractive distillation column, comprising:
- A) providing a 2-20 tray separation in the extractive distillation column between a reflux stream comprising an effective amount of water and a stream comprising an effective amount of solvent wherein the reflux stream comprises no more than about 3,000 ppm, by weight, aromatics based on the weight of the reflux stream, and wherein the reflux stream comprises at least about 99%, by weight, water based on the weight of the reflux stream.
Dependencies are inferred from the claim text.