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US 4,405,441 AGranted
Process for the preparation of hydrocarbon oil distillates
AssigneeShell Oil Company
InventorsRobert H. Van Dongen, John R. Newsome
Life of this patent
Estimating the term…
Abstract
Distillates are prepared from asphaltenes-rich feeds by a process comprising subjecting the feed to catalytic hydroconversion, and subjecting the distillation residue of the hydroconverted product to a combination of solvent deasphalting and thermal cracking.
Claims9
A process for the production of hydrocarbon oil distillates from a hydrocarbon mixture feed stream containing asphaltenes, said process comprising:
- (a) catalytically hydrotreating said feed stream in a hydrotreating zone, therein producing a first product stream having a reduced asphaltenes content;
- (b) fractionating said first product stream into one or more light distillate fractions and a first heavy distillate fraction;
- (c) thermally cracking said first heavy distillate fraction and a deasphalted oil fraction in a thermal cracking zone into a second product stream containing less than 20 percent by weight C.sub.4 to C.sub.1 hydrocarbons;
- (d) fractionating said second product stream into one or more light distillate fractions and a second heavy distillate fraction;
- (e) solvent deasphalting said second heavy distillate fraction in a deasphalting zone to obtain a deasphalted oil fraction and an asphaltic bitumen fraction;
- and
- (f) routing at least a portion of said deasphalted oil fraction from step (e) to said thermal cracking zone.
4 more elements
A process for the production of hydrocarbon oil distillates from a hydrocarbon mixture feed stream containing asphaltenes, said process comprising:
- (a) catalytically hydrotreating said feed stream in a hydrotreating zone, therein producing a first product stream having a reduced asphaltenes content;
- (b) fractionating said first product stream into one or more light distillate fractions and a first heavy distillate fraction;
- (c) solvent deasphalting said first heavy distillate fraction in a deasphalting zone to obtain a deasphalted oil fraction and an asphaltic bitumen fraction;
- (d) thermally cracking said deasphalted oil fraction in a thermal cracking zone into a second product stream containing less than 20 percent by weight C.sub.4 to C.sub.1 hydrocarbons;
- and
- (e) fractionating said second product stream into one or more light distillate fractions and a second heavy distillate fraction.
3 more elements
Dependencies are inferred from the claim text.