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US 7,271,303 B1Granted
Multi-zone process for the production of diesel and aromatic compounds
AssigneeUop LLC
InventorsPaul A. Sechrist, Stanley J. Frey
Life of this patent
Estimating the term…
Abstract
A multi-zone process for the production of low sulfur diesel and aromatic compounds wherein C9+ hydrocarbons are hydrocracked to produce low sulfur diesel and a naphtha boiling range stream which is reformed and transalkylated within reforming and transalkylation zones to produce an aromatics-rich high-octane stream containing xylene and to balance hydrogen needs.
Claims25
A process for the production of low sulfur diesel and aromatic compounds which process comprises:
- (a) contacting a hydrocarbonaceous stream comprising C9+ hydrocarbons with a hydrocracking catalyst in a hydrocracking zone under hydrocracking conditions to produce a hydrocracking zone effluent comprising xylenes;
- (b) passing the hydrocracking zone effluent into a fractionation zone to produce a first stream comprising hydrocarbons boiling in the range from about 38° C. (100° F.) to about 220° C. (428° F.) and a second stream comprising hydrocarbons boiling above about 220° C. (428° F.);
- (c) contacting at least a portion of the first stream with a reforming catalyst in a reforming zone under reforming conditions to produce a reforming zone effluent comprising hydrogen and aromatic compounds;
- (d) optionally contacting at least a portion of the reforming zone effluent with a transalkylation catalyst in a transalkylation zone under transalkylation conditions to produce a liquid hydrocarbonaceous transalkylation effluent and a gaseous stream comprising hydrogen;
- (e) passing at least a portion of the hydrogen produced in step (c) to the hydrocracking zone;
- and
- (f) recovering xylenes.
4 more elements
A process for the production of low sulfur diesel and aromatic compounds which process comprises:
- (a) reacting a hydrocarbonaceous stream comprising C9+ hydrocarbons in a hydrocracking zone containing a hydrocracking catalyst to produce a hydrocracking zone effluent comprising xylenes;
- (b) passing the hydrocracking zone effluent into a fractionation zone to produce an first stream comprising hydrocarbons boiling in the range from about 38° C. (100° F.) to about 220° C. (428° F.) and a second stream comprising hydrocarbons boiling above about 220° C. (428° F.);
- (c) reacting at least a portion of the first stream produced in step (b) in a reforming-transalkylation zone to produce a liquid hydrocarbonaceous transalkylation effluent and a gaseous stream comprising hydrogen;
- (d) passing at least a portion of the gaseous stream comprising hydrogen produced in step (c) to the hydrocracking zone;
- (e) passing at least a portion of the second stream produced in step (b) to the hydrocracking zone;
- and
- (f) recovering xylenes.
4 more elements
A process for the production of low sulfur diesel and aromatic compounds which process comprises:
- (a) reacting a hydrocarbonaceous stream comprising C9+ hydrocarbons in a hydrocracking zone containing a hydrocracking catalyst to produce a hydrocracking zone effluent comprising xylenes;
- (b) passing the hydrocracking zone effluent into a fractionation zone to produce an overhead stream comprising hydrocarbons boiling in the range from about 38° C. (100° F.) to about 220° C. (428° F.) and a liquid stream comprising hydrocarbons boiling above about 220° C. (428° F.);
- (c) condensing at least a portion of the overhead stream comprising hydrocarbons boiling in the range from about 38° C. (100° F.) to about 220° C. (428° F.) to produce a liquid hydrocarbon stream;
- (d) separating and reacting at least a portion of the liquid hydrocarbon stream produced in step (c) in a reforming-transalkylation zone to produce a liquid hydrocarbonaceous transalkylation effluent and a gaseous stream comprising hydrogen;
- (e) passing at least a portion of the gaseous stream comprising hydrogen produced in step (d) to the hydrocracking zone;
- (f) reacting at least a portion of the liquid hydrocarbon stream comprising hydrocarbons boiling above 220° C. (428° F.) produced in step (b) in an aromatic hydrogenation reaction zone;
- and
- (g) recovering xylenes.
5 more elements
Dependencies are inferred from the claim text.