Combination hydroconversion, fluid coking and gasification
First Claim
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1. A process for upgrading a liquid-comprising carbonaceous chargestock which comprises:
- (a) adding to said chargestock catalytic solids consisting essentially of carbonaceous fines resulting from step (k) to form a mixture, said fines having an average particle size of less than about 10 microns in diameter and a surface area of less than about 50 m2 /g;
(b) reacting the chargestock containing said catalytic fines with a molecular hydrogen-containing gas under hydroconversion conditions in a hydroconversion zone to produce a hydrocarbonaceous oil product;
(c) separating a heavy oil fraction from said hydrocarbonaceous oil product;
(d) contacting at least a portion of said separated heavy oil fraction with a bed of fluidized solids maintained in a fluid coking zone under fluid coking conditions to form coke, said coke depositing on said fluidized solids;
(e) introducing a portion of said solids with a coke deposition thereon into a heating zone operated at a temperature greater than said coking zone temperature to heat said portion of solids;
(f) recycling a first portion of heated solids from said heating zone to said coking zone;
(g) introducing a second portion of said heated solids to a fluid bed gasification zone maintained at a temperature greater than the temperature of said heating zone;
(h) reacting said second portion of heated solids in said gasification zone with steam and a molecular oxygen-containing gas to produce a hot gaseous stream containing hydrogen;
(i) introducing said hot gaseous stream containing hydrogen and entrained solids into said heating zone;
(j) recovering from said heating zone the resulting cooled gaseous stream containing hydrogen and entrained solid carbonaceous fines, and(k) separating at least a portion of said solid carbonaceous fines from said cooled gaseous stream, said separated fines having an average particle size of less than about 10 microns in diameter.
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Abstract
A combination slurry hydroconversion, coking and coke gasification process is provided wherein solid fines having an average particle size of less than 10 microns in diameter or the ashes thereof recovered from a gaseous product derived from the coke gasification are used as a catalyst in the hydroconversion stage.
29 Citations
14 Claims
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1. A process for upgrading a liquid-comprising carbonaceous chargestock which comprises:
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(a) adding to said chargestock catalytic solids consisting essentially of carbonaceous fines resulting from step (k) to form a mixture, said fines having an average particle size of less than about 10 microns in diameter and a surface area of less than about 50 m2 /g; (b) reacting the chargestock containing said catalytic fines with a molecular hydrogen-containing gas under hydroconversion conditions in a hydroconversion zone to produce a hydrocarbonaceous oil product; (c) separating a heavy oil fraction from said hydrocarbonaceous oil product; (d) contacting at least a portion of said separated heavy oil fraction with a bed of fluidized solids maintained in a fluid coking zone under fluid coking conditions to form coke, said coke depositing on said fluidized solids; (e) introducing a portion of said solids with a coke deposition thereon into a heating zone operated at a temperature greater than said coking zone temperature to heat said portion of solids; (f) recycling a first portion of heated solids from said heating zone to said coking zone; (g) introducing a second portion of said heated solids to a fluid bed gasification zone maintained at a temperature greater than the temperature of said heating zone; (h) reacting said second portion of heated solids in said gasification zone with steam and a molecular oxygen-containing gas to produce a hot gaseous stream containing hydrogen; (i) introducing said hot gaseous stream containing hydrogen and entrained solids into said heating zone; (j) recovering from said heating zone the resulting cooled gaseous stream containing hydrogen and entrained solid carbonaceous fines, and (k) separating at least a portion of said solid carbonaceous fines from said cooled gaseous stream, said separated fines having an average particle size of less than about 10 microns in diameter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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Specification