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US 4,686,028 AGranted
Upgrading of high boiling hydrocarbons
OwnerRoger P. Van Driesen, John R. Fridayinventors
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Abstract
A feed is subjected to deasphalting to separately recover oil, resin and pitch. The resin fraction is upgraded to valuable product, for example, by hydrogenation or visbreaking, and heavier components from the upgrading are recycled to the deasphalting for removing pitchlike components prior to being recycled to the upgrading step.
Claims14
A process for upgrading a high boiling hydrocarbon, comprising:
- deasphalting the high boiling hydrocarbon to recover as separate fractions, deasphalted oil, resin and pitch;
- upgrading the resin fraction to produce an effluent containing upgraded product and high boiling components;
- recovering high boiling components from the effluent;
- subjecting said deasphalting at least a portion of the recovered high boiling components to reject coke precursors in the (pitch fraction) high boiling components portion prior to recycle thereof to said upgrading with the resin fraction;
- and thereafter recyling the high boiling components portion with the resin fraction to said upgrading.
2 more elements
A process of upgrading a residual oil, comprising:
- deasphalting the residual oil in a first zone and in a second zone, said deasphalting in the first zone separating a deasphalted oil fraction from a pitch and resin fraction and said deasphalting in the second zone separating a pitch fraction from a resin fraction;
- hydrogenating the resin fraction in an expanded bed to produce an effluent containing upgraded product and remaining high boiling components;
- (and) introducing remaining high boiling components into the second zone of the deasphalting to reject coke precursors with the pitch prior to recycle to the expanded bed hydrogenating with the resin fraction;
- and thereafter recycling remaining high boiling components to the expanded bed hydrogenating with the resin fraction.
1 more element
Dependencies are inferred from the claim text.