US4525268A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combination process for upgrading residual oils
Assignee: Ashland LLC
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Filing: 1983-11-10
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Granted: 1985-06-25
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Expires: 2003-11-10
Abstract
Abstract A combination operation for upgrading reduced crudes is described which particularly restricts the contact time between hydrocarbons, solid sorbent material and cracking catalyst particles whereby quenching of visbroken product vapors is eliminated, coke formation is substantially restricted and catalytic cracking of hot product vapors of visbreaking contributes to the catalytic cracking thereof in a time-temperature restricted atmosphere providing substantial yields of gasoline and gasoline precursors.
Inventors
- 👤 Dwight F. Barger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:30
CPC Classifications
C; C10; C10G; C10G51/00; C10G51/02; C10G51/04; C10G55/00; C10G55/02; C10G55/06
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
206 words
A method for converting heavy residual oil feeds comprising metallo-organic compounds boiling above 1050° F. to produce gasoline boiling products which comprises, A. contacting said residual oil feed for less than about two seconds in substantially plug flow with solid sorbent fluid particle material in a first transport zone at an elevated temperature and for a time sufficient to demetallize and decarbonize said residual oil feed and thermally visbreak multi-ring compounds boiling above 1050° F. to vaporous material boiling below 1050° F., separating vaporous materials from solid sorbent particle material, B. thereafter immediately contacting said separated vaporous material with an active high temperature crystalline zeolite cracking catalyst discharged by a standpipe to form a flowing suspension in plug flow therewith in a second lateral transport reaction zone above the first transport zone at a temperature within the range of 1050° F. to 1350° F. for a period of time less than about 3 seconds, C. discharging the suspension in said second transport zone downwardly into a product vapor-catalyst separation zone, recovering vaporous products of said zeolite catalyst cracking operation separately from catalyst particles in said product separation zone, D. regenerating said solid sorbent particles material and recycling said material for contact with additional heavy oil feed.
Claim 2
Independent Claim
206 words
A method for converting heavy residual oil feeds comprising metallo-organic compounds boiling above 1050° F. to produce gasoline boiling products which comprises, A. contacting said residual oil feed for less than about two seconds in substantially plug flow with solid sorbent fluid particle material in a first transport zone at an elevated temperature and for a time sufficient to demetallize and decarbonize said residual oil feed and thermally visbreak multi-ring compounds boiling above 1050° F. to vaporous material boiling below 1050° F., separating vaporous materials from solid sorbent particle material, B. thereafter immediately contacting said separated vaporous material with an active high temperature crystalline zeolite cracking catalyst discharged by a standpipe to form a flowing suspension in plug flow therewith in a second lateral transport reaction zone above the first transport zone at a temperature within the range of 1050° F. to 1350° F. for a period of time less than about 3 seconds, C. discharging the suspension in said second transport zone downwardly into a product vapor-catalyst separation zone, recovering vaporous products of said zeolite catalyst cracking operation separately from catalyst particles in said product separation zone, D. regenerating said solid sorbent particles material and recycling said material for contact with additional heavy oil feed.
Claim 3
Dependent Claim
47 words
The method of claim 1 wherein the lapse of time between recovery of vaporous material from solid sorbent material and contact with said crystalline zeolite cracking catalyst to form a suspension therewith is a fraction of a second and without significant cooling of the recovered vaporous materials.
Claim 4
Dependent Claim
28 words
The method of claim 1 wherein the solid sorbent fluid particle material is selected from relatively inert clays and cracking catalyst comprising little if any catalytic cracking activity.
Claim 5
Dependent Claim
37 words
The method of claim 1 wherein demetallization and decarbonization of the heavy oil feed with solid sorbent material is at least 75 or 80 percent before contact of formed vaporous product thereof with said zeolite cracking catalyst.
Claim 6
Dependent Claim
94 words
The method of claim 1 wherein exposure of the residual oil feed to contact with solid sorbent material at an elevated visbreaking temperature is restricted to not exceed about 1 second and vaporous products thereof are brought in contact with a suspended crystalline zeolite cracking catalyst in a time frame less than a fraction of a second from the time of separation from inert solids, said suspension of hydrocarbon vapors and zeolite cracking catalyst passed through a transport zone for a period of time sufficient to convert vaporous material to gasoline boiling range material.
Claim 7
Dependent Claim
60 words
The method of claim 1 wherein the residual oil is upgraded thermally with inert sorbent material in the presence of a normally gaseous product of catalytic cracking comprising hydrogen, said solid sorbent particle to oil feed ratio being in the range of 2-6 to 1 on a weight basis in a riser at a suspension velocity below about 100 ft./sec.
Claim 8
Dependent Claim
49 words
The method of claim 1 wherein the vaporous hydrocarbon product of the inert solid contact is catalytically converted to gasoline and gasoline precursors with dispersed phase catalyst particle at a concentration in the range of 3-10 to 1 on a weight basis at a suspension velocity below 100 ft./sec.
Claim 9
Dependent Claim
40 words
The method of claim 1 wherein the solid sorbent particles and the catalyst particles separated from transport contact zones are separately stripped at an elevated temperature equal to or above the temperature recovered from their respective elongated confined transport zones.
Claim 10
Dependent Claim
26 words
The method of claim 1 wherein the separated solid sorbent particles are regenerated at a higher temperature than the temperature relied upon to regenerate catalyst particles.
Claim 11
Dependent Claim
32 words
The method of claim 1 wherein said vaporous hydrocarbon product separated from solid sorbent material is contacted with catalyst particles at a catalyst to oil ratio of 6-8 on a weight basis.
Claim 12
Dependent Claim
45 words
The method of claim 1 wherein catalytic cracking of vaporous hydrocarbon product is effected with suspended catalyst in a transport zone under temperature and contact time conditions providing a transport reactor zone outlet temperatue in the range of 950° F. up to about 1150° F.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-06-24 | 1988-12-24 | 1989-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-06-24 | 1992-12-24 | 1993-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-06-24 | 1996-12-24 | 1997-06-25 | $7700.00 | Window Closed / Lapsed |