TARGETED PRETREATMENT AND SELECTIVE RING OPENING IN LIQUID-FULL REACTORS
First Claim
1. A process for hydroprocessing a hydrocarbon feed, which comprises (a) contacting the feed with (i) a diluent and (ii) hydrogen, to produce a feed/diluent/hydrogen mixture, wherein the hydrogen is dissolved in the mixture to provide a liquid feed;
- (b) contacting the feed/diluent/hydrogen mixture with a first catalyst in a first treatment zone, to produce a first product effluent;
(c) contacting the first product effluent with a second catalyst in a second treatment zone, to produce a second product effluent; and
(d) recycling a portion of the second product effluent as a recycle product stream for use in the diluent in step (a)(i) at a recycle ratio of from about 1 to about 8, wherein the first treatment zone comprises at least two stages, wherein the first catalysts is a hydrotreating catalyst and the second catalyst is a ring opening catalyst, the first and second treatment zones are liquid-full reaction zones, and the total amount of hydrogen fed to the process is greater than 100 normal liters of hydrogen per liter of feed.
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Abstract
A process for hydroprocessing hydrocarbons in a combined targeted pretreatment and selective ring-opening unit wherein the targeted pretreatment comprises at least two stages in a single liquid recycle loop. The process operates as a liquid-full process, wherein all of the hydrogen dissolves in the liquid phase. Heavy hydrocarbons and light cycle oils can be converted in the process to provide a liquid product having over 50% in the diesel boiling range, with properties to meet use in low sulfur diesel.
22 Citations
20 Claims
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1. A process for hydroprocessing a hydrocarbon feed, which comprises (a) contacting the feed with (i) a diluent and (ii) hydrogen, to produce a feed/diluent/hydrogen mixture, wherein the hydrogen is dissolved in the mixture to provide a liquid feed;
- (b) contacting the feed/diluent/hydrogen mixture with a first catalyst in a first treatment zone, to produce a first product effluent;
(c) contacting the first product effluent with a second catalyst in a second treatment zone, to produce a second product effluent; and
(d) recycling a portion of the second product effluent as a recycle product stream for use in the diluent in step (a)(i) at a recycle ratio of from about 1 to about 8, wherein the first treatment zone comprises at least two stages, wherein the first catalysts is a hydrotreating catalyst and the second catalyst is a ring opening catalyst, the first and second treatment zones are liquid-full reaction zones, and the total amount of hydrogen fed to the process is greater than 100 normal liters of hydrogen per liter of feed. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
- (b) contacting the feed/diluent/hydrogen mixture with a first catalyst in a first treatment zone, to produce a first product effluent;
Specification