Methods for hydrocracking a heavy oil feedstock using an in situ colloidal or molecular catalyst and recycling the colloidal or molecular catalyst
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
C10G-047/26
C10G-047/02
출원번호
US-0838761
(2010-07-19)
등록번호
US-8431016
(2013-04-30)
발명자
/ 주소
Lott, Roger K.
Lee, Lap-Keung
출원인 / 주소
Headwaters Heavy Oil, LLC
대리인 / 주소
Workman Nydegger
인용정보
피인용 횟수 :
6인용 특허 :
177
초록▼
A hydrocracking system involves introducing a heavy oil feedstock and a colloidal or molecular catalyst, or a precursor composition capable of forming the colloidal or molecular catalyst, into a hydrocracking reactor. The colloidal or molecular catalyst is formed in situ within the heavy oil feedsto
A hydrocracking system involves introducing a heavy oil feedstock and a colloidal or molecular catalyst, or a precursor composition capable of forming the colloidal or molecular catalyst, into a hydrocracking reactor. The colloidal or molecular catalyst is formed in situ within the heavy oil feedstock 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. The colloidal or molecular catalyst catalyzes upgrading reactions between the heavy oil feedstock and hydrogen and eliminates or reduces formation of coke precursors and sediment. At least a portion of a resid fraction containing residual colloidal or molecular catalyst is recycled back into the hydrocracking reactor to further upgrade the recycled resid fraction portion and provide recycled colloidal or molecular catalyst within the hydrocracking reactor.
대표청구항▼
1. A method of hydroprocessing a heavy oil feedstock, comprising: mixing a hydrocarbon oil diluent and a catalyst precursor composition below a temperature at which a significant portion of the catalyst precursor composition starts to decompose to form a diluted precursor mixture;mixing the diluted
1. A method of hydroprocessing a heavy oil feedstock, comprising: mixing a hydrocarbon oil diluent and a catalyst precursor composition below a temperature at which a significant portion of the catalyst precursor composition starts to decompose to form a diluted precursor mixture;mixing the diluted precursor mixture with a heavy oil feedstock comprised of a substantial quantity of hydrocarbons having a boiling point greater than about 343° C. in a manner so as to yield a conditioned feedstock comprising the heavy oil feedstock, the hydrocarbon oil diluent, and the catalyst precursor composition;heating the conditioned feedstock so as to decompose the catalyst precursor composition and allow metal liberated from the decomposed catalyst precursor composition to react with sulfur liberated from the heavy oil feedstock so as to form a colloidal or molecular catalyst in situ within the heavy oil feedstock;heating or maintaining the heavy oil feedstock at a hydrocracking temperature within a hydrocracking reactor to form hydrocarbon free radicals from the heavy oil feedstock, the colloidal or molecular catalyst catalyzing reactions between hydrogen and hydrocarbon free radicals in the hydrocracking reactor to yield an upgraded material and reducing or eliminating formation of coke precursors and sediment in the hydrocracking reactor;transferring the upgraded material, together with residual colloidal or molecular catalyst and hydrogen, to a separator so as to separate gaseous and volatile fractions from a resid fraction containing the residual colloidal or molecular catalyst, the residual colloidal or molecular catalyst reducing or eliminating formation of coke precursors and sediment within the separator; andrecycling at least a portion of the resid fraction and residual colloidal or molecular catalyst remaining in the recycled resid fraction portion from the separator back into the hydrocracking reactor so as to further upgrade the recycled resid fraction portion and provide recycled colloidal or molecular catalyst within the hydrocracking reactor. 2. A method as defined in claim 1, wherein the heavy oil feedstock comprises at least one of heavy crude oil, oil sand bitumen, atmospheric tower bottoms, vacuum tower bottoms, resid, visbreaker bottoms, coal tar, heavy oil from oil shale, or liquefied coal. 3. A method as defined in claim 1, wherein the heavy oil feedstock comprises at least about 5% by weight of asphaltenes. 4. A method as defined in claim 1, wherein the heavy oil feedstock initially comprises at least about 30% by weight of hydrocarbons having a boiling point of at least about 524° C. 5. A method as defined in claim 1, wherein the heavy oil feedstock initially comprises at least about 50% by weight of hydrocarbons having a boiling point of at least about 524° C. 6. A method as defined in claim 1, wherein the heavy oil feedstock initially comprises at least about 95% by weight of hydrocarbons having a boiling point of at least about 524° C. 7. A method as defined in claim 1, wherein the colloidal or molecular catalyst at least initially provides catalyst metal in a range of about 5 ppm to about 500 ppm by weight of the heavy oil feedstock. 8. A method as defined in claim 1, wherein the colloidal or molecular catalyst at least initially provides catalyst metal in a range of about 15 ppm to about 300 ppm by weight of the heavy oil feedstock. 9. A method as defined in claim 1, wherein the colloidal or molecular catalyst at least initially provides catalyst metal in a range of about 25 ppm to about 175 ppm by weight of the heavy oil feedstock. 10. A method as defined in claim 1, wherein the catalyst precursor composition comprises 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. 11. A method as defined in claim 1, wherein the catalyst precursor composition comprises at least one of molybdenum 2-ethylhexanoate, molybdenum naphthanate, molybdenum hexacarbonyl, vanadium octoate, vanadium naphthanate, or iron pentacarbonyl. 12. A method as defined in claim 1, wherein the hydrocarbon oil diluent and the catalyst precursor composition are mixed at temperature in a range of about 25° C. to about 250° C., the diluted precursor mixture and heavy oil feedstock are mixed at a temperature in a range of about 25° C. to about 350° C., and the conditioned feedstock are heated to a temperature in a range of about 275° C. to about 450° C. 13. A method as defined in claim 1, wherein the hydrocarbon oil diluent and the catalyst precursor composition are mixed at temperature in a range of about 50° C. to about 200° C., the diluted precursor mixture and heavy oil feedstock are mixed at a temperature in a range of about 50° C. to about 300° C., and the conditioned feedstock are heated to a temperature in a range of about 350° C. to about 440° C. 14. A method as defined in claim 1, wherein the hydrocarbon oil diluent and the catalyst precursor composition are mixed at temperature in a range of about 75° C. to about 150° C., the diluted precursor mixture and heavy oil feedstock are mixed at a temperature in a range of about 75° C. to about 250° C., and the conditioned feedstock are heated to a temperature in a range of about 375° C. to about 420° C. 15. A method as defined in claim 1, wherein the hydrocracking reactor comprises an ebullated bed reactor. 16. A method as defined in claim 1, wherein the separator comprises a hot separator or a distillation tower. 17. A method as defined in claim 1, wherein at least a portion of the colloidal or molecular catalyst has a size less than about 100 nm. 18. A method as defined in claim 1, wherein at least a portion of the colloidal or molecular catalyst has a size less than about 10 nm. 19. A method as defined in claim 1, wherein at least a portion of the colloidal or molecular catalyst has a size less than about 5 nm. 20. A method as defined in claim 1, wherein the colloidal or molecular catalyst has a size less than 1 micron. 21. A method as defined in claim 1, wherein the hydrocracking temperature within the hydrocracking reactor is in a range of about 410° C. to about 460° C. 22. A method as defined in claim 1, wherein the hydrocracking temperature within the hydrocracking reactor is in a range of about 420° C. to about 450° C. 23. A method as defined in claim 1, wherein the hydrocracking temperature within the hydrocracking reactor is in a range of about 430° C. to about 445° C. 24. A method of hydroprocessing a heavy oil feedstock, comprising: mixing a diluent and a catalyst precursor composition below a temperature at which a significant portion of the catalyst precursor composition starts to decompose to form a diluted precursor mixture;mixing the diluted precursor mixture with a heavy oil feedstock comprised of a substantial quantity of hydrocarbons having a boiling point greater than about 343° C. before the feedstock is fed into a hydrocracking reactor and raised to a hydrocracking temperature, before a substantial portion of the catalyst precursor composition is caused or allowed to decompose and form the colloidal or molecular catalyst, and in a manner so as to yield a conditioned feedstock that forms a colloidal or molecular catalyst upon decomposing the catalyst precursor composition and allowing metal liberated therefrom to react with sulfur liberated from the feedstock;heating the conditioned feedstock so as to decompose the catalyst precursor composition and allow metal liberated from the decomposed catalyst precursor composition to react with sulfur liberated from the heavy oil feedstock so as to form the colloidal or molecular catalyst in situ within the heavy oil feedstock, wherein the colloidal or molecular catalyst has a size less than 1 micron and at least initially provides catalyst metal in a range of about 5 ppm to about 500 ppm by weight of the heavy oil feedstock;heating or maintaining the heavy oil feedstock at a hydrocracking temperature within a hydrocracking reactor to form hydrocarbon free radicals from the heavy oil feedstock, the colloidal or molecular catalyst catalyzing reactions between hydrogen and hydrocarbon free radicals in the hydrocracking reactor to yield an upgraded material and reducing or eliminating formation of coke precursors and sediment in the hydrocracking reactor;transferring the upgraded material, together with residual colloidal or molecular catalyst and hydrogen, to a separator so as to separate gaseous and volatile fractions from a resid fraction containing the residual colloidal or molecular catalyst, the residual colloidal or molecular catalyst reducing or eliminating formation of coke precursors and sediment within the separator; andrecycling at least a portion of the resid fraction and residual colloidal or molecular catalyst remaining in the recycled resid fraction portion from the separator back into the hydrocracking reactor so as to further upgrade the recycled resid fraction portion and provide recycled colloidal or molecular catalyst within the hydrocracking reactor. 25. A method of hydroproces sing a heavy oil feedstock, comprising: providing a heavy oil feedstock comprised of at least about 5% by weight of asphaltenes and at least about 30% by weight of hydrocarbons having a boiling point of at least about 524° C.;forming a colloidal or molecular catalyst in situ within the heavy oil feedstock by first mixing a catalyst precursor with a hydrocarbon oil diluent to form a diluted precursor mixture which is thereafter mixed into the heavy oil feedstock before the feedstock is fed into a hydrocracking reactor and raised to a hydrocracking temperature and before a significant portion of the catalyst precursor is caused or allowed to decompose and form the colloidal or molecular catalyst and then causing or allowing the catalyst precursor to decompose and form the colloidal or molecular catalyst in situ within the heavy oil feedstock, wherein the colloidal or molecular catalyst has a size less than 1 micron and at least initially provides catalyst metal in a range of about 5 ppm to about 500 ppm by weight of the heavy oil feedstock;heating or maintaining the heavy oil feedstock at a hydrocracking temperature within a hydrocracking reactor to form hydrocarbon free radicals from the heavy oil feedstock, the colloidal or molecular catalyst catalyzing reactions between hydrogen and hydrocarbon free radicals in the hydrocracking reactor to yield an upgraded material and reducing or eliminating formation of coke precursors and sediment in the hydrocracking reactor;transferring the upgraded material, together with residual colloidal or molecular catalyst and hydrogen, to a separator so as to separate gaseous and volatile fractions from a resid fraction containing the residual colloidal or molecular catalyst, the residual colloidal or molecular catalyst reducing or eliminating formation of coke precursors and sediment within the separator; andrecycling at least a portion of the resid fraction and residual colloidal or molecular catalyst remaining in the recycled resid fraction portion from the separator back into the hydrocracking reactor so as to further upgrade the recycled resid fraction portion and provide recycled colloidal or molecular catalyst within the hydrocracking reactor. 26. A method as defined in any of claim 1, 24 or 25, wherein the hydrocracking reactor comprises a slurry phase reactor. 27. A method as defined in claim 24 or 25, wherein the hydrocracking reactor comprises an ebullated bed reactor. 28. A method as defined in claim 24 or 25, wherein the separator comprises a hot separator. 29. A method as defined in claim 24 or 25, wherein the separator comprises a distillation tower. 30. A method as defined in claim 24 or 25, wherein the colloidal or molecular catalyst has a size less than about 100 nm. 31. A method as defined in claim 24 or 25, wherein the colloidal or molecular catalyst has a size less than about 10 nm. 32. A method as defined in claim 24 or 25, wherein the colloidal or molecular catalyst has a size less than about 5 nm. 33. A method as defined in any of claim 1, 24 or 25, wherein the hydrocracking reactor comprises a fixed bed reactor. 34. A method as defined in any of claim 1, 24 or 25, wherein the diluent comprises a hydrocarbon oil diluent selected from the group consisting of vacuum gas oil, decant oil, cycled oil, light gas oil, and mixtures thereof. 35. A method of hydroprocessing a heavy oil feedstock, comprising: mixing a diluent and a catalyst precursor composition below a temperature at which a significant portion of the catalyst precursor composition starts to decompose to form a diluted precursor mixture;mixing the diluted precursor mixture with a heavy oil feedstock comprised of a substantial quantity of hydrocarbons having a boiling point greater than about 343° C. in a manner so as to yield a conditioned feedstock comprising the heavy oil feedstock, the diluent, and the catalyst precursor composition;heating the conditioned feedstock to a temperature so as to decompose the catalyst precursor composition and allow metal liberated from the decomposed catalyst precursor composition to react with sulfur liberated from the heavy oil feedstock so as to form well-dispersed metal sulfide catalyst particles in situ within the heavy oil feedstock less than 1 micron in size;heating or maintaining the heavy oil feedstock at a hydrocracking temperature within a hydrocracking reactor to form hydrocarbon free radicals from the heavy oil feedstock, the well-dispersed metal sulfide catalyst particles catalyzing reactions between hydrogen and hydrocarbon free radicals in the hydrocracking reactor to yield an upgraded material and reducing or eliminating formation of coke precursors and sediment in the hydrocracking reactor;transferring the upgraded material, together with residual metal sulfide catalyst particles and hydrogen, to a separator so as to separate gaseous and volatile fractions from a resid fraction containing the residual metal sulfide catalyst particles, the residual metal sulfide catalyst particles reducing or eliminating formation of coke precursors and sediment within the separator; andrecycling at least a portion of the resid fraction and residual metal sulfide catalyst particles remaining in the recycled resid fraction portion from the separator back into the hydrocracking reactor so as to further upgrade the recycled resid fraction portion and provide recycled metal sulfide catalyst particles within the hydrocracking reactor. 36. A method as in claim 35, wherein the catalyst precursor comprises an oil-soluble molybdenum compound. 37. A method as in claim 35, wherein the diluent is a hydrocarbon oil diluent. 38. A method of hydroproces sing a heavy oil feedstock, comprising: intimately mixing an oil-soluble molybdenum compound and a heavy oil feedstock at a temperature in a range of about 25° C. to about 350 ° C. and for a time period in a range of about 1 second to about 20 minutes so as to yield a conditioned feedstock;heating the conditioned feedstock to a temperature so as to decompose the molybdenum compound, cause or allow molybdenum liberated from the decomposed molybdenum compound to react with sulfur liberated from the heavy oil feedstock, and form the well-dispersed molybdenum sulfide catalyst particles in situ within the heavy oil feedstock less than 1 micron in size;heating or maintaining the heavy oil feedstock at a hydrocracking temperature within a hydrocracking reactor to form hydrocarbon free radicals from the heavy oil feedstock, the well-dispersed molybdenum sulfide catalyst particles catalyzing reactions between hydrogen and hydrocarbon free radicals in the hydrocracking reactor to yield an upgraded material and reducing or eliminating formation of coke precursors and sediment in the hydrocracking reactor;transferring the upgraded material, together with residual molybdenum sulfide catalyst particles and hydrogen, to a separator so as to separate gaseous and volatile fractions from a resid fraction containing the residual molybdenum sulfide catalyst particles, the residual molybdenum sulfide catalyst particles reducing or eliminating formation of coke precursors and sediment within the separator; andrecycling at least a portion of the resid fraction and residual molybdenum sulfide catalyst particles remaining in the recycled resid fraction portion from the separator back into the hydrocracking reactor so as to further upgrade the recycled resid fraction portion and provide recycled molybdenum sulfide catalyst particles within the hydrocracking reactor. 39. A method as in claim 38, further comprising mixing the oil-soluble molybdenum compound with a hydrocarbon oil diluent prior to mixing with the heavy oil feedstock.
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이 특허에 인용된 특허 (177)
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