US4773986A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High severity visbreaking
Assignee: Lummus Technology LLC
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Filing: 1986-12-18
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Granted: 1988-09-27
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Expires: 2006-12-18
Abstract
Abstract The severity of a visbreaking operation is increased by treating product to remove a heavier phase in an amount of less than 15 weight percent and provide a remaining product having a Shell Hot Filtration number of less than 0.25.
Inventors
- 👤 Robert J. Feldman
- 👤 Andrei Rhoe
- 👤 Roger P. Van Driesen
- 👤 Joseph F. Puzio
- 👤 Vincent A. Strangio
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:31
CPC Classifications
C; C10; C10G; C10G67/00; C10G67/02; C10G55/00; C10G55/02; C10G55/04; C10G67/04; C10G67/0454; C10G67/049; C10G9/00; C10G9/007
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
96 words
A process for upgrading a viscous feed, comprising: subjecting a viscous feed to visbreaking at a severity to produce a visbreaking product having a Shell Hot Filtration number of greater than 0.25; and treating at least a portion of the visbreaking product to separate a heavy phase containing an asphaltene portion, said heavy phase being separated in an amount no greater than 15% by weight, of a 650° F.+ fraction of said at least a portion of the visbreaking product said treating providing a remaining product have a Shell Hot Filtration number of less than 0.25.
Claim 2
Dependent Claim
96 words
A process for upgrading a viscous feed, comprising: subjecting a viscous feed to visbreaking at a severity to produce a visbreaking product having a Shell Hot Filtration number of greater than 0.25; and treating at least a portion of the visbreaking product to separate a heavy phase containing an asphaltene portion, said heavy phase being separated in an amount no greater than 15% by weight, of a 650° F.+ fraction of said at least a portion of the visbreaking product said treating providing a remaining product have a Shell Hot Filtration number of less than 0.25.
Claim 3
Dependent Claim
33 words
The process of claim 1 wherein a portion of the visbreaking product which boils above 650° F. is subjected to said treating to provide a Shell Hot Filtration number of less than 0.25.
Claim 4
Dependent Claim
18 words
The process of claim 2 wherein said treating comprises centrifugation to separate a heavier phase from remaining product.
Claim 5
Dependent Claim
33 words
The process of claim 3 wherein the heavy phase is separated in an amount no greater than 5%, by weight, of the 650° F.+ fraction of the visbreaking product subjected to the treating.
Claim 6
Dependent Claim
14 words
The process of claim 1 wherein said treating includes the addition of an antisolvent.
Claim 7
Dependent Claim
14 words
The process of claim 1 wherein said treating includes the addition of a diluent.
Claim 8
Dependent Claim
33 words
The process of claim 1 wherein the heavy phase is separated in an amount no greater than 5%, by weight, of the 650° F.+ fraction of the visbreaking product subjected to the treating.
Claim 9
Dependent Claim
19 words
The process of claim 7 wherein the remaining product has a Shell Hot Filtration number of less than 0.15.
Claim 10
Dependent Claim
20 words
The process of claim 1 wherein the treating is effected at a temperature of from 200° F. to 700° F.
Claim 11
Dependent Claim
28 words
The process of claim 1 wherein the visbreaking is effected at a severity to convert from 4% to 25%, by weight, of the viscous feed to 350° F.-material.
Claim 12
Dependent Claim
20 words
The process of claim 3 wherein the treating is effected at a temperature of from 200° F. to 700° F.
Claim 13
Dependent Claim
30 words
The process of claim 11 wherein the visbreaking is effected at a severity to convert from 4% to 25%, by weight, of the viscous feed to 350° F. - material.
Claim 14
Dependent Claim
30 words
The process of claim 8 wherein the visbreaking is effected at a severity to convert from 4% to 25%, by weight, of the viscous feed to 350° F. - material.
Claim 15
Dependent Claim
23 words
The process of claim 1 wherein said remaining product is suitable for blending with a cutter stock for use as a fuel oil.
Claim 16
Dependent Claim
112 words
A process for upgrading a viscous feed, comprising: subjecting a viscous feed to visbreaking at a severity to produce a visbreaking product having a Shell Hot Filtration number of greater than 0.25; and treating at least a portion of the visbreaking product to separate a heavy phase containing an asphaltene portion, said heavy phase being separated in an amount no greater than 15%, by weight, of a 650° F.+ fraction of said at least a portion of the visbreaking product said treating providing a remaining product having a Shell Hot Filtration number of less than 0.25; and recycling a portion of the remaining product to the visbreaking to reduce coking and fouling.
Claim 17
Dependent Claim
112 words
A process for upgrading a viscous feed, comprising: subjecting a viscous feed to visbreaking at a severity to produce a visbreaking product having a Shell Hot Filtration number of greater than 0.25; and treating at least a portion of the visbreaking product to separate a heavy phase containing an asphaltene portion, said heavy phase being separated in an amount no greater than 15%, by weight, of a 650° F.+ fraction of said at least a portion of the visbreaking product said treating providing a remaining product having a Shell Hot Filtration number of less than 0.25; and recycling a portion of the remaining product to the visbreaking to reduce coking and fouling.
Claim 18
Dependent Claim
18 words
The process of claim 15 wherein said treating comprises centrifugation to separate a heavier phase from remaining product.
Claim 19
Dependent Claim
30 words
The process of claim 15 wherein the visbreaking is effected at a severity to convert from 4% to 25%, by weight of the viscous feed to 350° F. - material.
Claim 20
Dependent Claim
16 words
The process of claim 15 wherein the heavy phase is physically separated from the remaining product.
Claim 21
Dependent Claim
33 words
The process of claim 17 wherein the heavy phase is separated in an amount no greater than 5%, by weight, of the 650° F.+ fraction of the visbreaking product subjected to the treating.
Claim 22
Dependent Claim
19 words
The process of claim 19 wherein the remaining product has a Shell Hot Filtration number of less than 0.15.
Claim 23
Dependent Claim
14 words
The process of claim 15 wherein said treating includes the addition of a diluent.
Claim 24
Dependent Claim
23 words
The process of claim 15 wherein said remaining product is suitable for blending with a cutter stock for use as a fuel oil.
References Cited (Backward Citations)
US3365384A
Cited
US3684685A
Cited
US4178228A
Cited
US4470900A
Cited
US4277324A
Cited
US4481101A
Cited
US4389302A
Cited
US4508614A
Cited
US4454023A
Cited
US4615791A
Cited
US4604188A
Cited
US4530755A
Cited
US4657665A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-09-27 | 1992-03-28 | 1992-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-09-27 | 1996-03-28 | 1996-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-09-27 | 2000-03-28 | 2000-09-27 | $7700.00 | Window Closed / Lapsed |