An ebullated bed hydroprocessing system, and also a method for upgrading a pre-existing ebullated bed hydroprocessing system, involves introducing a colloidal or molecular catalyst, or a precursor composition capable of forming the colloidal or molecular catalyst, into an ebullated bed reactor. The
An ebullated bed hydroprocessing system, and also a method for upgrading a pre-existing ebullated bed hydroprocessing system, involves introducing a colloidal or molecular catalyst, or a precursor composition capable of forming the colloidal or molecular catalyst, into an ebullated bed reactor. The colloidal or molecular catalyst is formed by intimately mixing a catalyst precursor composition into a heavy oil feedstock and raising the temperature of the feedstock to above the decomposition temperature of the precursor composition to form the colloidal or molecular catalyst in situ. The improved ebullated bed hydroprocessing system includes at least one ebullated bed reactor that employs both a porous supported catalyst and the colloidal or molecular catalyst to catalyze hydroprocessing reactions involving the feedstock and hydrogen. The colloidal or molecular catalyst provides catalyst in what would otherwise constitute catalyst free zones within the ebullated bed hydroprocessing system. Asphaltene or other hydrocarbon molecules too large to diffuse into the pores of the supported catalyst can be upgraded by the colloidal or molecular catalyst. A slurry phase reactor may be positioned upstream from one or more ebullated bed reactors or converted from a pre-existing ebullated bed reactor.
대표청구항▼
What is claimed is: 1. An ebullated bed hydroprocessing system, comprising: an ebullated bed reactor comprised of: an expanded catalyst bed comprising a porous supported catalyst as a solid phase; an upper region above the expanded catalyst bed that is devoid of the porous supported catalyst; a low
What is claimed is: 1. An ebullated bed hydroprocessing system, comprising: an ebullated bed reactor comprised of: an expanded catalyst bed comprising a porous supported catalyst as a solid phase; an upper region above the expanded catalyst bed that is devoid of the porous supported catalyst; a lower region below the expanded catalyst bed that is devoid of the porous supported catalyst; a liquid hydrocarbon phase comprised of a heavy oil feedstock within the expanded catalyst bed, the upper region, and the lower region; a colloidal or molecular catalyst having a particle size less than about 100 nm dispersed throughout the liquid hydrocarbon phase; and a gaseous phase comprised of hydrogen gas dispersed in the liquid hydrocarbon phase; mixing apparatus for intimately mixing a catalyst precursor composition with a hydrocarbon oil diluent at a temperature below which the catalyst precursor composition decomposes in order to form a diluted precursor mixture comprised of the hydrocarbon oil diluent and the catalyst precursor composition; blending apparatus positioned upstream of the ebullated bed reactor for blending the diluted precursor mixture with the heavy oil feedstock to form a conditioned feedstock in which the catalyst precursor composition is sufficiently well dispersed within the heavy oil feedstock so as to form the colloidal or molecular catalyst in situ upon heating and decomposition of the catalyst precursor composition; and heating means for heating the conditioned feedstock in order to decompose the catalyst precursor composition and form the colloidal or molecular catalyst in situ within the heavy oil feedstock. 2. An ebullated bed hydroprocessing system as defined in claim 1, wherein the heavy oil feedstock within the expanded catalyst bed, the upper region, and the lower region is at a hydrocracking temperature. 3. An ebullated bed hydroprocessing system as defined in claim 1, wherein the blending apparatus is configured to intimately mix the diluted precursor mixture containing the catalyst precursor composition into the heavy oil feedstock to further reduce the particle size of the colloidal or molecular catalyst. 4. An ebullated bed hydroprocessing system as defined in claim 1, wherein the heating means is positioned upstream of the ebullated bed reactor. 5. An ebullated bed hydroprocessing system as defined in claim 1, wherein the heating means at least partially comprises the ebullated bed reactor. 6. An ebullated bed hydroprocessing system as defined in claim 1, wherein the catalyst precursor composition comprises an organo-metallic compound or complex. 7. An ebullated bed hydroprocessing system as defined in claim 1, the catalyst precursor composition comprising at least one transition metal and at least one organic moiety comprising or derived from octanoic acid, 2-ethylhexanoic acid, naphthanic acid, pentacarbonyl, or hexacarbonyl. 8. An ebullated bed hydroprocessing system as defined in claim 1, the catalyst precursor composition comprising at least one of molybdenum 2-ethylhexanoate, molybdenum naphthanate, molybdenum hexacarbonyl, vanadium octoate, vanadium naphthanate, or iron pentacarbonyl. 9. An ebullated bed hydroprocessing system as defined in claim 1, wherein the hydrocarbon oil diluent comprises at least one of vacuum gas oil, decant oil, cycle oil, or light gas oil. 10. An ebullated bed hydroprocessing system as defined in claim 1, the mixing apparatus being configured to yield a ratio of the catalyst precursor composition to the hydrocarbon oil diluent in a range of about 1:500 to about 1:1. 11. An ebullated bed hydroprocessing system as defined in claim 1, the colloidal or molecular catalyst comprising at least one transition metal site donated by the catalyst precursor composition and at least one sulfur site donated by the heavy oil feedstock. 12. An ebullated bed hydroprocessing system as defined in claim 11, the colloidal or molecular catalyst comprising individual metal sulfide catalyst molecules and/or colloidal-sized catalyst particles of metal sulfide. 13. An ebullated bed hydroprocessing system as defined in claim 1, the colloidal or molecular catalyst providing catalyst metal having a concentration in a range of about 10 ppm to about 500 ppm by weight of the heavy oil feedstock. 14. An ebullated bed hydroprocessing system as defined in claim 1, further comprising a hydrocracking reactor positioned upstream from the ebullated bed reactor and downstream from the blending apparatus. 15. An ebullated bed hydroprocessing system as defined in claim 14, the hydrocracking reactor comprising a slurry phase reactor containing a liquid phase comprised of a heavy oil feedstock and a molecular or colloidal catalyst and a gaseous phase comprised of hydrogen gas. 16. An ebullated bed hydroprocessing system as defined in claim 15, the slurry phase reactor comprising a former ebullated bed reactor that was converted into the slurry phase reactor by removing the supported catalyst from the former ebullated bed reactor. 17. An ebullated bed hydroprocessing system as defined in claim 15, the slurry phase reactor comprising a recycle channel, recycling pump, and a distributor grid plate. 18. An ebullated bed hydroprocessing system, comprising: an ebullated bed reactor comprised of: an expanded catalyst bed comprising a porous supported catalyst as a solid phase; an upper region above the expanded catalyst bed that is devoid of the porous supported catalyst; a lower region below the expanded catalyst bed that is devoid of the porous supported catalyst; a liquid hydrocarbon phase comprised of a heavy oil feedstock within the expanded catalyst bed, the upper region, and the lower region; a colloidal or molecular catalyst having a particle size less than about 100 nm dispersed throughout the liquid hydrocarbon phase; and a gaseous phase comprised of hydrogen gas dispersed in the liquid hydrocarbon phase; mixing apparatus for intimately mixing a catalyst precursor composition with a hydrocarbon oil diluent at a temperature below which the catalyst precursor composition decomposes in order to form a diluted precursor mixture comprised of the hydrocarbon oil diluent and the catalyst precursor composition; blending apparatus positioned upstream of the ebullated bed reactor for blending the diluted precursor mixture with the heavy oil feedstock at a temperature below which the catalyst precursor composition is completely decomposed to form a conditioned feedstock in which the catalyst precursor composition is sufficiently well dispersed within the heavy oil feedstock so as to form the colloidal or molecular catalyst in situ upon heating and decomposition of the catalyst precursor composition; heating means positioned upstream of the ebullated bed reactor for heating the conditioned feedstock in order to decompose the catalyst precursor composition and form the colloidal or molecular catalyst in situ within the heavy oil feedstock; and means for introducing the heavy oil feedstock containing the colloidal or molecular catalyst into the ebullated bed reactor. 19. An ebullated bed hydroprocessing system as defined in claim 18, wherein the blending apparatus is configured to intimately mix the diluted precursor mixture containing the catalyst precursor composition into the heavy oil feedstock in order for the particle size of the colloidal or molecular catalyst to be less than about 10 nm. 20. An ebullated bed hydroprocessing system as defined in claim 18, wherein the hydrocarbon oil diluent comprises at least one of vacuum gas oil, decant oil, cycle oil, or light gas oil. 21. An ebullated bed hydroprocessing system as defined in claim 18, the mixing apparatus being configured to yield a ratio of the catalyst precursor composition to the hydrocarbon oil diluent in a range of about 1:500 to about 1:1. 22. An ebullated bed hydroprocessing system as defined in claim 18, the colloidal or molecular catalyst providing catalyst metal having a concentration in a range of about 10 ppm to about 500 ppm by weight of the heavy oil feedstock. 23. An ebullated bed hydroprocessing system as defined in claim 18, further comprising a hydrocracking reactor positioned upstream from the ebullated bed reactor. 24. An ebullated bed hydroprocessing system as defined in claim 23, the hydrocracking reactor comprising an ebullated bed reactor, fixed bed reactor or slurry phase reactor. 25. An ebullated bed hydroprocessing system, comprising: an ebullated bed reactor comprised of: an expanded catalyst bed comprising a porous supported catalyst as a solid phase; an upper region above the expanded catalyst bed that is devoid of the porous supported catalyst; a lower region below the expanded catalyst bed that is devoid of the porous supported catalyst; a liquid hydrocarbon phase comprised of a heavy oil feedstock within the expanded catalyst bed, the upper region, and the lower region; a colloidal or molecular catalyst dispersed throughout the liquid hydrocarbon phase; and a gaseous phase comprised of hydrogen gas dispersed in the liquid hydrocarbon phase; mixing apparatus for intimately mixing a catalyst precursor composition with a hydrocarbon oil diluent at a temperature below which the catalyst precursor composition decomposes in order to form a diluted precursor mixture comprised of the hydrocarbon oil diluent and the catalyst precursor composition; blending apparatus positioned upstream of the ebullated bed reactor for blending the diluted precursor mixture with the heavy oil feedstock prior to formation of the colloidal or molecular catalyst to form a conditioned feedstock in which the catalyst precursor composition is sufficiently well dispersed within the heavy oil feedstock so as to form the colloidal or molecular catalyst in situ upon heating and decomposition of the catalyst precursor composition; and heating means for heating the conditioned feedstock in order to decompose the catalyst precursor composition and form the colloidal or molecular catalyst in situ within the heavy oil feedstock.
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이 특허에 인용된 특허 (116)
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