초록 ▼

A process for the desulfurization and demetalation of a nickel and sulfur containing heavy hydrocarbon charge stock comprises: admixing the feed with hydrogen; reacting the admixture in a reaction zone containing desulfurization catalyst at desulfurization conditions; injecting water into the reacti

A process for the desulfurization and demetalation of a nickel and sulfur containing heavy hydrocarbon charge stock comprises: admixing the feed with hydrogen; reacting the admixture in a reaction zone containing desulfurization catalyst at desulfurization conditions; injecting water into the reaction zone at H2O/H2 molar ratios of about 0.05 to 0.5; separating and recycling both hydrogen and water from the reactor effluent; and recovering the substantially sulfur and nickel free product.

대표청구항 ▼

In a process for removing sulfur and nickel from a heavy hydrocarbon charge stock which contains from about 10 to about 3000 ppm total metals including nickel and from about 1 to about 10 weight percent sulfur by reaction of the charge stock with hydrogen in the presence of a desulfurization catalys

In a process for removing sulfur and nickel from a heavy hydrocarbon charge stock which contains from about 10 to about 3000 ppm total metals including nickel and from about 1 to about 10 weight percent sulfur by reaction of the charge stock with hydrogen in the presence of a desulfurization catalyst in a reactor with one or more catalyst beds including a first catalyst bed, the improvement comprising reducing the hydrogen partial pressure and enhancing sulfur and nickel removal by: (a) mixing said charge stock and a hydrogen-rich stream optionally containing water; (b) heating the mixture from step (a) to reaction temperature; (c) injecting said heated mixture and water into said reactor and reacting the resulting heated admixture in said first catalyst bed, said first catalyst bed containing desulfurization catalyst which consists of at least one metallic component selected from the Groups VIB and VIII of the Periodic Table deposited on a refractory inorganic oxide support, under desulfurization conditions, wherein the water to hydrogen molar ratio in the reaction is from about 0.05 to about 0.5; (d) separating a light gas stream which contains H2, H2O, H2S and light hydrocarbons from the effluent of said reaction zone; (e) separating the H2O from said light gas stream leaving a substantially dry light gas stream; (f) recycling the separated H2O for injection as in step (c); (g) separating from H2S from the dry light gas stream leaving a hydrogen-rich stream; (h) recycling said hydrogen-rich stream for admixing with said charge stock, and (i) recovering the desulfurized and demetallized product from the effluent of said reaction zone; said water injected in steps (a) and (c) being at a temperature which is not in excess of the reaction temperature in step (b).