US4428824A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for visbreaking resid deasphaltenes
Assignee: Mobil Oil AS
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Filing: 1982-09-27
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Granted: 1984-01-31
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Expires: 2002-09-27
Abstract
Abstract A process is described for visbreaking a deasphalted hydrocarbon oil and subsequently reblending the recovered asphaltene fraction to produce a product of low viscosity and pour point and requiring less cutter stock oil as compared to conventional visbreaking processes.
Inventors
- 👤 Byung C. Choi
- 👤 Benjamin Gross
- 👤 Madhava Malladi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:47
CPC Classifications
C; C10; C10G; C10G55/00; C10G55/02; C10G55/04; C10G2300/00; C10G2300/10; C10G2300/107
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
69 words
An improved process for producing a fuel oil from a resid feed, said process consisting essentially of: (1) deasphalting said resid feed in the presence of a solvent to produce a deasphalted oil and an asphaltene fraction; (2) visbreaking said deasphalted oil; (3) reblending said asphaltene fraction into said deasphalted oil subsequent to said visbreaking; and (4) further blending the product of step (3) with viscosity cutter stock oil.
Claim 2
Dependent Claim
69 words
An improved process for producing a fuel oil from a resid feed, said process consisting essentially of: (1) deasphalting said resid feed in the presence of a solvent to produce a deasphalted oil and an asphaltene fraction; (2) visbreaking said deasphalted oil; (3) reblending said asphaltene fraction into said deasphalted oil subsequent to said visbreaking; and (4) further blending the product of step (3) with viscosity cutter stock oil.
Claim 3
Dependent Claim
18 words
The process of claim 1 wherein said solvent comprises a paraffin within a C 3 -C 8 range.
Claim 4
Dependent Claim
18 words
The process of claim 1 wherein the range of said solvent is within C 3 -C 4 .
Claim 5
Dependent Claim
20 words
The process of claim 1 wherein said solvent to said resid feed ratio ranges from 1 to 20 by weight.
Claim 6
Dependent Claim
20 words
The process of claim 1 wherein said solvent to said resid feed ratio is from 5 to 12 by weight.
Claim 7
Dependent Claim
28 words
The process of claim 1 wherein said solvent is removed from said deasphalted oil and said asphaltene fraction prior to visbreaking and recycled for use in step 1.
Claim 8
Dependent Claim
121 words
A process for the production of a fuel oil product of low viscosity and pour point said process consisting essentially of the following steps: (1) deasphalting a resid feed in the presence of a solvent comprising a light normal paraffin within a C 3 -C 8 range, said solvent to resid feed ratio ranging from 1 to 20 by weight to produce a deasphalted oil and asphaltene fraction; (2) removing said solvent from said deasphalted oil and said asphaltene fraction; (3) recycling said solvent for use in step 1; (4) visbreaking said deasphalted oil; (5) reblending said asphaltene fraction into said deasphalted oil fraction subsequent to visbreaking; and (6) further blending the product of step 5 with viscosity cutter stock oil.
Claim 9
Dependent Claim
121 words
A process for the production of a fuel oil product of low viscosity and pour point said process consisting essentially of the following steps: (1) deasphalting a resid feed in the presence of a solvent comprising a light normal paraffin within a C 3 -C 8 range, said solvent to resid feed ratio ranging from 1 to 20 by weight to produce a deasphalted oil and asphaltene fraction; (2) removing said solvent from said deasphalted oil and said asphaltene fraction; (3) recycling said solvent for use in step 1; (4) visbreaking said deasphalted oil; (5) reblending said asphaltene fraction into said deasphalted oil fraction subsequent to visbreaking; and (6) further blending the product of step 5 with viscosity cutter stock oil.
Claim 10
Dependent Claim
18 words
The process of claim 7 wherein the range of said solvent is within C 3 -C 4 .
Claim 11
Dependent Claim
19 words
The process of claim 7 wherein the range of said solvent to resid ratio is from 5 to 12.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-01-30 | 1987-08-01 | 1988-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-01-30 | 1991-08-01 | 1992-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-01-30 | 1995-08-01 | 1996-01-31 | $7700.00 | Window Closed / Lapsed |