Patent US3476186A successfully refreshed from Google Patents.
US4846958A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High severity visbreaking with recycle
Assignee: Lummus Technology LLC
•
Filing: 1988-05-26
•
Granted: 1989-07-11
•
Expires: 2008-05-26
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 recycling treated product.
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 08:46
CPC Classifications
C; C10; C10G; C10G35/00; C10G35/02; C10G55/00; C10G55/02; C10G55/04; C10G67/00; C10G67/02; C10G67/04; C10G67/0454; C10G67/049; C10G9/00; C10G9/007
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
115 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; 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, based on the fraction of a 650°+F. fraction of the visbreaking product subjected to said treating, said treating providing a remaining product having a reduced Shell Hot Filtration number with respect to said visbreaking product; and recycling a portion of the remaining product to the visbreaking to reduce coking and fouling.
Claim 2
Dependent Claim
115 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; 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, based on the fraction of a 650°+F. fraction of the visbreaking product subjected to said treating, said treating providing a remaining product having a reduced Shell Hot Filtration number with respect to said visbreaking product; and recycling a portion of the remaining product to the visbreaking to reduce coking and fouling.
Claim 3
Dependent Claim
29 words
The process of claim 1 wherein a portion of the visbreaking product which boils above 650° F. is subjected to said treating to reduce the Shell Hot Filtration number.
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
32 words
The process of claim 1 wherein the heavy phase is separated in an amount no greater than 5%, be weight, of the 650° F.+fraction of the visbreaking product subjected to the treating.
Claim 9
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 10
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 11
Dependent Claim
21 words
The process of claim 1 wherein only the portion of the visbreaking product to be recycled is subjected to said treating.
Claim 12
Dependent Claim
19 words
The process of claim 1 wherein the treating is effected at a temperature from 200° F. to 700° F.
Claim 13
Dependent Claim
29 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
29 words
The process of claim 7 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
22 words
The process of claim 1, wherein said treating provides a remaining product having a Shell Hot Filtration number of at least 0.25.
References Cited (Backward Citations)
US2191972A
Cited
US2133240A
Cited
US4486295A
Cited
US4389302A
Cited
US4396494A
Cited
US4428824A
Cited
US4530755A
Cited
US4514283A
Cited
US4767521A
Cited
US4773986A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-07-10 | 1993-01-09 | 1993-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-07-10 | 1997-01-09 | 1997-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-07-10 | 2001-01-09 | 2001-07-11 | $7700.00 | Window Closed / Lapsed |