초록 ▼

Methods of hydroprocessing hydrocarbon streams are provided that employ substantially liquid-phase hydroprocessing conditions. In one aspect, the method includes directing a hydrocarbonaceous feed stock to a first substantially liquid-phase hydroprocessing zone wherein an effluent from the first sub

Methods of hydroprocessing hydrocarbon streams are provided that employ substantially liquid-phase hydroprocessing conditions. In one aspect, the method includes directing a hydrocarbonaceous feed stock to a first substantially liquid-phase hydroprocessing zone wherein an effluent from the first substantially liquid-phase hydroprocessing zone is directed to a second substantially liquid-phase hydroprocessing zone generally undiluted with other hydrocarbon streams. In another aspect, the method recycles a liquid portion of a liquid hydrocarbonaceous effluent from the second substantially liquid-phase hydroprocessing zone, which preferably includes an amount of hydrogen dissolved therein, to the hydrocarbonaceous feed stock so that the feed to the first substantially liquid-phase hydroprocessing zone has a relatively larger concentration of dissolved hydrogen relative to the hydrocarbonaceous feed stock.

대표청구항 ▼

What is claimed is: 1. A method of hydroprocessing a hydrocarbonaceous feed stock comprising: providing a feed stream including at least an admixture of the hydrocarbonaceous feed stock, a previously hydroprocessed liquid-phase hydrocarbonaceous stream, and hydrogen; the hydrogen of the feed stream

What is claimed is: 1. A method of hydroprocessing a hydrocarbonaceous feed stock comprising: providing a feed stream including at least an admixture of the hydrocarbonaceous feed stock, a previously hydroprocessed liquid-phase hydrocarbonaceous stream, and hydrogen; the hydrogen of the feed stream provided by hydrogen from the previously hydroprocessed liquid-phase hydrocarbonaceous stream and added hydrogen, the added hydrogen provided in an amount effective to increase a hydrogen content of the feed stream while maintaining the feed stream in a substantially liquid-phase condition; directing the feed stream to a first substantially liquid-phase hydroprocessing zone to form a first effluent; admixing an amount of hydrogen in the first effluent, the admixed hydrogen provided in an amount effective to increase a hydrogen content of the first effluent while maintaining the first effluent in a substantially liquid-phase condition; directing the first effluent to a second substantially liquid-phase hydroprocessing zone to form a second effluent having at least a liquid component; recycling a portion of the liquid component from the second effluent to the feed stream to provide the previously hydroprocessed liquid-phase hydrocarbonaceous stream; and the first effluent being substantially undiluted with another hydrocarbon stream. 2. The method of claim 1, wherein the hydrogen content of the feed stream is in excess of that required to saturate the feed stream. 3. The method of claim 2, wherein the amount of hydrogen admixed with the first effluent is effective to provide the hydrogen content in the first effluent in excess of that required to saturate the first effluent. 4. The method of claim 1, wherein the previously hydroprocessed liquid-phase hydrocarbonaceous stream is saturated with hydrogen. 5. The method of claim 4, wherein the second effluent is directed to a separation zone to separate one or more gaseous components from the second effluent, the separation zone operating at a temperature and pressure substantially the same as a temperature and pressure in the second substantially liquid-phase hydroprocessing zone. 6. The method of claim 1, wherein a ratio of the hydrocarbonaceous feed stock to the previously hydroprocessed liquid-phase hydrocarbonaceous stream is from about 1:1 to about 1:10. 7. A method of hydroprocessing a hydrocarbonaceous feed stock comprising: introducing a liquid-phase feed into a first substantially liquid-phase continuous hydroprocessing zone to produce a first hydroprocessing zone effluent; the liquid-phase feed including an admixture of a hydrocarbonaceous feed stock, a portion of a liquid-phase hydrocarbonaceous effluent from a second substantially liquid-phase continuous hydroprocessing zone, and an amount of hydrogen, the liquid-phase feed maintained under substantially liquid-phase conditions, the hydrogen therein in a form available for substantially consistent consumption in the first substantially liquid-phase continuous hydroprocessing zone; taking at least a portion of the first hydroprocessing zone effluent as a hydroprocessing feed, the hydroprocessing feed being substantially undiluted with another hydrocarbon stream; adding hydrogen to the hydroprocessing feed under substantially liquid-phase conditions, the hydrogen in a form available for substantially consistent consumption in the second substantially liquid-phase continuous hydroprocessing zone; introducing the hydroprocessing feed into the second substantially liquid-phase hydroprocessing zone to provide a second hydroprocessing zone effluent having gaseous hydrocarbons and liquid hydrocarbons; separating the second hydroprocessing zone effluent in a separation zone into a gas-phase effluent including the gaseous hydrocarbons and the liquid-phase hydrocarbonaceous effluent including the liquid hydrocarbons; and recycling at least a portion of the liquid-phase hydrocarbonaceous effluent to the liquid-phase feed. 8. The method of claim 7, wherein the amount of hydrogen in the liquid-phase feed is in excess of that required to saturate the liquid-phase feed. 9. The process of claim 8, wherein the amount of hydrogen added to the liquid-phase feed is up to about 1000 percent over that required for saturation of the liquid-phase feed. 10. The method of claim 7, wherein the hydrogen added to the hydroprocessing feed is in an amount in excess of that required for saturation of the hydroprocessing feed. 11. The process of claim 10, wherein the amount of hydrogen added to the hydroprocessing feed is up to about 1000 percent over that required for saturation of the hydroprocessing feed. 12. The process of claim 7, wherein the liquid-phase hydrocarbonaceous effluent has an amount of hydrogen therein. 13. The process of claim 7, wherein the first substantially liquid-phase continuous hydroprocessing zone is a substantially liquid-phase continuous hydrotreating zone. 14. The process of claim 7, wherein the second substantially liquid-phase continuous hydroprocessing zone is a substantially liquid-phase continuous hydrocracking zone. 15. The process of claim 14, wherein the substantially liquid-phase continuous hydrocracking zone is capable of maintaining substantially liquid-phase conditions at an inlet thereof at pressures of about 16.5 MPa (2400 psig) or less. 16. The process of claim 7, wherein a temperature and a pressure in the separation zone are substantially the same as a temperature and a pressure in the substantially liquid-phase hydrocracking zone. 17. A method of hydroprocessing a hydrocarbonaceous feed stock comprising: providing a liquid-phase feed including an admixture of a hydrocarbonaceous feed stock, a portion of a liquid-phase hydrocarbonaceous effluent from a substantially liquid-phase continuous hydrocracking zone, and hydrogen while maintaining a substantially liquid-phase condition, the hydrogen in an amount in excess of that required for saturation of the liquid-phase feed; introducing the liquid-phase feed into a substantially liquid-phase continuous hydrotreating zone operated at hydrotreating conditions to produce a hydrotreating zone effluent having hydrogen sulfide and ammonia; adding hydrogen in the hydrotreating zone effluent in an amount in excess of that required for saturation of the hydrotreating zone effluent; introducing the hydrotreating zone effluent substantially undiluted with another hydrocarbon stream into the substantially liquid-phase continuous hydrocracking zone to provide a hydrocracking zone effluent having a gaseous component and a liquid component having an amount of hydrogen therein; separating the hydrocracking zone effluent in a separation zone into a gas-phase effluent including the gaseous component and the liquid-phase hydrocarbonaceous effluent including the liquid component; and recycling at least a portion of the liquid-phase hydrocarbonaceous effluent to the liquid-phase feed. 18. The method of claim 17, wherein the gaseous component formed in the substantially liquid-phase continuous hydrocracking zone includes light naphtha having a boiling point from about 4° C. (40° F.) to about 204° C. (400° F.), hydrogen sulfide, ammonia, C1 to C4 gaseous hydrocarbons, and combinations thereof. 19. The method of claim 17, wherein a ratio of hydrocarbonaceous feed stock to liquid-phase hydrocarbonaceous effluent is about 1:1 to about 1:10. 20. The method of claim 17, wherein a temperature and pressure in the substantially liquid-phase continuous hydrocracking zone is substantially the same as a temperature and pressure in the separation zone.