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US 4,482,453 AGranted
Supercritical extraction process
AssigneePhillips Petroleum Company
InventorsDaniel M. Coombs, Gary P. Willers
Life of this patent
Estimating the term…
Abstract
The recovery of hydrocarbon values from high metals content feeds can be carried out more efficiently via supercritical extraction with recycle of a portion of the asphalt product and proper control of the use of countercurrent solvent flow to said extraction.
Claims20
A process for the recovery of extract oils from a high metals content carbonaceous feed which comrpises the steps of:
- (1) contacting said feed with a solvent in a first separation zone comprising an extraction vessel under supercritical conditions for said solvent in which zone the separation of said feed into a light phase and a heavy phase is effected;
- (2) passing said heavy phase from step (1) to a first stripper where said stripper's light phase, containing solvent, is recovered for reuse and said stripper's heavy phase, containing asphalt product, is divided into two portions, with one portion being recycled to said first separation zone and the other portion being recovered as asphalt product;
- and
- (3) passing said light phase from step (1) to a second separation zone wherein a second light phase, containing solvent, is produced and is recycled to said first separation zone, and a heavy phase, produced from said second separation zone, is passed to a second stripper for recovery of said second stripper's extract product containing heavy phase and said second stripper's solvent containing light phase, which is reused.
1 more element
A process for the recovery of extract oils from a high metals content carbonaceous feed which comprises the steps of:
- (1) contacting said feed with a solvent in a first separation zone comprising an extraction vessel under supercritical conditions for said solvent in which zone the separation of said feed into a light phase and a heavy phase is effected;
- (2) passing a portion of said heavy phase from step (1) to be recycled to said first separation zone via the feed oil conduit or directly to said first separation zone;
- and
- (3) passing said light phase from step (1) to a second separation zone wherein a second light phase, containing solvent, is produced and is recycled to said first separation zone, and a heavy phase, produced from said second separation zone, is passed to a second stripper for recovery of said second stripper's extract product containing heavy phase and said second stripper's solvent containing light phase, which is reused.
1 more element
Dependencies are inferred from the claim text.