HYDROTREATING UNIT WITH INTEGRATED OXIDATIVE DESULFURIZATION
1 Assignment
0 Petitions
Accused Products
Abstract
A system and process for desulfurizing a hydrocarbon feed stream containing organosulfur compounds is provided. In general, the system includes a conventional hydrotreating unit through the high pressure cold or hot separator. Aqueous oxidant and an oxidative catalyst are mixed with the hydrotreated hydrocarbon effluent from the high pressure cold or hot separator, and oxidative desulfurization reactions occur in the low pressure separation zone, thereby minimizing or eliminating the requirement of additional oxidative desulfurization reactors.
-
Citations
13 Claims
-
1-9. -9. (canceled)
-
10. A hydrotreating unit for desulfurizing a hydrocarbon feed stream containing organosulfur compounds, the hydrotreating unit comprising:
-
a catalytic hydrotreating reaction zone having a feedstock inlet for receiving a hydrocarbon feed stream, a hydrogen inlet, and a hydrotreated hydrocarbon effluent outlet for discharging hydrotreated effluent containing hydrogen sulfide and a mixture of hydrocarbons, the mixture of hydrocarbons having a reduced organosulfur compound content as compared to the hydrocarbon feed stream; a high pressure separator having a hydrotreated hydrocarbon inlet in fluid communication with the hydrotreated hydrocarbon effluent outlet, and a separated hydrotreated hydrocarbon outlet; an oxidant inlet downstream of the separated hydrotreated hydrocarbon outlet; a catalyst inlet downstream of the separated hydrotreated hydrocarbon outlet; a low pressure separator having a mixed stream inlet downstream of the oxidant inlet and the catalyst inlet and in fluid communication with the separated hydrotreated hydrocarbon outlet, the mixed stream inlet for receiving a mixture of oxidant, catalyst and separated hydrotreated hydrocarbon liquid from the separated hydrotreated hydrocarbon outlet of the high pressure separator, a gas overhead outlet for discharging hydrogen sulfide, ammonia gas and any light hydrocarbons, a water outlet for discharging excess water, ammonium sulfide salt, any unreacted oxidant and any oxidation reaction products dissolved in water, and a liquid hydrocarbon outlet for discharging liquid hydrocarbons and oxidation reaction products including sulfoxides and/or sulfones; and an extraction unit having an extraction unit inlet for receiving liquid from the liquid hydrocarbon outlet of the low pressure separator, a solvent inlet for receiving an extraction solvent, an extractor bottoms outlet for discharging liquid hydrocarbon product; and an extractor tops outlet for discharging oxidation reaction product and extraction solvent.
-
-
11. A hydrotreating unit for desulfurizing a hydrocarbon feed stream containing organosulfur compounds, the hydrotreating unit comprising:
-
a catalytic hydrotreating reaction zone having a feedstock inlet for receiving a hydrocarbon feed stream, a hydrogen inlet, and a hydrotreated hydrocarbon effluent outlet for discharging hydrotreated effluent containing hydrogen sulfide and a mixture of hydrocarbons, the mixture of hydrocarbons having a reduced organosulfur compound content as compared to the hydrocarbon feed stream; a high pressure separator having a hydrotreated hydrocarbon inlet in fluid communication with the hydrotreated hydrocarbon effluent outlet, and a separated hydrotreated hydrocarbon outlet; an oxidant inlet downstream of the separated hydrotreated hydrocarbon outlet; a catalyst inlet downstream of the separated hydrotreated hydrocarbon outlet; a first low pressure separator having a mixed stream inlet downstream of the oxidant inlet and the catalyst inlet and in fluid communication with the separated hydrotreated hydrocarbon outlet, the mixed stream inlet for receiving a mixture of oxidant, catalyst and separated hydrotreated hydrocarbon liquid from the separated hydrotreated hydrocarbon outlet of the high pressure separator, a gas overhead outlet for discharging hydrogen sulfide, ammonia gas and any light hydrocarbons from the first low pressure separator, an optional water outlet for discharging, from the first low pressure separator, excess water, ammonium sulfide salt, any unreacted oxidant and any oxidation reaction products dissolved in water, and a liquid hydrocarbon outlet for discharging, from the first low pressure separator, liquid hydrocarbons and oxidation reaction products including sulfoxides and/or sulfones; a second low pressure separator having a mixed stream inlet in fluid communication with the liquid hydrocarbon outlet of the first low pressure separator, a gas overhead outlet for discharging hydrogen sulfide, ammonia gas and any light hydrocarbons from the second low pressure separator, a water outlet for discharging, from the second low pressure separator, excess water, ammonium sulfide salt, any unreacted oxidant and any oxidation reaction products dissolved in water, and a liquid hydrocarbon outlet for discharging, from the second low pressure separator, liquid hydrocarbons and oxidation reaction products including sulfoxides and/or sulfones; and an extraction unit having an extraction unit inlet for receiving liquid from the liquid hydrocarbon outlet of the second low pressure separator, a solvent inlet for receiving an extraction solvent, an extractor bottoms outlet for discharging liquid hydrocarbon product; and an extractor tops outlet for discharging oxidation reaction product and extraction solvent. - View Dependent Claims (12)
-
-
13. A hydrotreating unit for desulfurizing a hydrocarbon feed stream containing organosulfur compounds, the hydrotreating unit comprising:
-
a catalytic hydrotreating reaction zone having a feedstock inlet for receiving a hydrocarbon feed stream, a hydrogen inlet, and a hydrotreated hydrocarbon effluent outlet for discharging hydrotreated effluent containing hydrogen sulfide and a mixture of hydrocarbons, the mixture of hydrocarbons having a reduced organosulfur compound content as compared to the hydrocarbon feed stream; a high pressure separator having a hydrotreated hydrocarbon inlet in fluid communication with the hydrotreated hydrocarbon effluent outlet, and a separated hydrotreated hydrocarbon outlet; an oxidant inlet downstream of the separated hydrotreated hydrocarbon outlet; a catalyst inlet downstream of the separated hydrotreated hydrocarbon outlet; a parallel arrangement of low pressure separators, each having a mixed stream inlet downstream of the oxidant inlet and the catalyst inlet and in fluid communication with the separated hydrotreated hydrocarbon outlet, the mixed stream inlet for receiving a mixture of oxidant, catalyst and separated hydrotreated hydrocarbon liquid from the separated hydrotreated hydrocarbon outlet of the high pressure separator, a gas overhead outlet for discharging hydrogen sulfide, ammonia gas and any light hydrocarbons, a water outlet for discharging excess water, ammonium sulfide salt, any unreacted oxidant and any oxidation reaction products dissolved in water, and a liquid hydrocarbon outlet for discharging liquid hydrocarbons and oxidation reaction products including sulfoxides and/or sulfones; and an extraction unit having an extraction unit inlet for receiving liquid from the liquid hydrocarbon outlet of each of the low pressure separators, a solvent inlet for receiving an extraction solvent, an extractor bottoms outlet for discharging liquid hydrocarbon product; and an extractor tops outlet for discharging oxidation reaction product and extraction solvent.
-
Specification