Back to results
US 4,400,264 AGranted
Process for the preparation of hydrocarbon oil distillates
AssigneeShell Oil Company
InventorsPieter B. Kwant, 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 thermal cracking, and subjecting the distillation residue of the cracked product to a combination of solvent deasphalting and catalytic hydroconversion.
Claims9
A process for the production of hydrocarbon oil distillates from a hydrocarbon mixture feed stream containing asphaltenes, said process comprising:
- (a) thermally cracking said feed stream and a deasphalted oil fraction in a thermal cracking zone into a first product stream containing less than 20 percent by weight C.sub.4 to C.sub.1 hydrocarbons;
- (b) fractionating said first product stream into one or more light distillate fractions and a first heavy distillate fraction;
- (c) catalytically hydrotreating said first heavy distillate fraction in a hydrotreating zone, therein producing a second product stream having a reduced asphaltenes content;
- (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 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) thermally cracking said feed stream and a deasphalted oil fraction in a thermal cracking zone into a first product stream containing less than 20 percent by weight C.sub.4 to C.sub.1 hydrocarbons;
- (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) routing said deasphalted oil fraction to said thermal cracking zone;
- (e) catalytically hydrotreating said asphaltic bitumen fraction in a hydrotreating zone, therein producing a second product stream having a reduced asphaltenes content;
- (f) fractionating said second product stream into one or more light distillate fractions and a second heavy distillate fraction;
- and
- (g) routing said second heavy distillate fraction to
- (i) said deasphalting zone wherein said second heavy distillate fraction is solvent deasphalted,
- (ii) said thermal cracking zone wherein said second heavy distillate fraction is thermally cracked, or
- (iii) said deasphalting zone and said thermal cracking zone.
8 more elements
Dependencies are inferred from the claim text.