US4615791A
Expired / Lapsed
US
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Visbreaking process
Assignee: Mobil Oil AS
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Filing: 1985-09-03
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Granted: 1986-10-07
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Expires: 2005-09-03
Abstract
Abstract Heavy petroleum oils such as resids are subjected to visbreaking in the presence of a hydroaromatic hydrogen donor solvent having an aromatic and alpha-to-aromatic proton content each of at least 20 percent of the total solvent hydrogen. The amount of donor solvent is from 0.1 to 50, preferably 0.1 to 20, weight percent of the heavy oil feed. The visbreaking may be carried out at relatively high severities as the use of the donor solvent reduces coke formation as well as producing a product of reduced viscosity, pour point and sedimentation characteristics. Reaction severity is usually in the range of 250 to 1500 seconds ERT at 800 DEG F. (427 DEG C.) but may range up to 15000 seconds ERT. Suitable solvents may be obtained from catalytic cracking process, for example, FCC cycle oils, slurry oils and main column bottoms.
Inventors
- 👤 Byung C. Choi
- 👤 Benjamin Gross
- 👤 Madhava Malladi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:12
CPC Classifications
C; C10; C10G; C10G9/00; C10G9/007; C10G47/00; C10G47/32; C10G47/34
Claims Analysis
Total Claims: 39
Claim 1
Independent Claim
95 words
A process for visbreaking a heavy petroleum residual oil in which the oil is subjected to visbreaking at an equivalent reaction time, ERT, of less than or equal to about 800 seconds at 800° F. in the absence of added free hydrogen and in the presence of about 0.1 to 50 weight percent of a highly aromatic hydrogen donor material characterized by its hydrogen content distribution, in H Ar and H alpha are each at least 20 percent of the total hydrogen content of the donor, to produce a visbroken oil product having reduced viscosity.
Claim 2
Dependent Claim
95 words
A process for visbreaking a heavy petroleum residual oil in which the oil is subjected to visbreaking at an equivalent reaction time, ERT, of less than or equal to about 800 seconds at 800° F. in the absence of added free hydrogen and in the presence of about 0.1 to 50 weight percent of a highly aromatic hydrogen donor material characterized by its hydrogen content distribution, in H Ar and H alpha are each at least 20 percent of the total hydrogen content of the donor, to produce a visbroken oil product having reduced viscosity.
Claim 3
Dependent Claim
34 words
A process according to claim 1 in which the H Ar and H alpha proton contents of the donor are from 20 to 50 percent each of the total hydrogen content of the donor.
Claim 4
Dependent Claim
39 words
A process according to claim 2 in which the donor solvent has an H Ar content of at least 2.0 weight percent of the donor and an H alpha content of at least 1.9 weight percent of the donor.
Claim 5
Dependent Claim
25 words
A process according to claim 1 in which the amount of the donor is from 1 to 20 weight percent of the heavy residual oil.
Claim 6
Dependent Claim
20 words
A process according to claim 1 in which the donor comprises a fraction produced by the catalytic cracking of petroleum.
Claim 7
Dependent Claim
39 words
A process according to claim 5 in which the hydrogen donor is a clarified slurry oil, a cycle oil, or a main column bottoms fraction obtained from the fluid catalytic cracking of petroleum of a TCC syntower bottoms fraction.
Claim 8
Dependent Claim
18 words
A process according to claim 1 in which the donor comprises a hydrocarbon obtained from a non-petroleum source.
Claim 9
Dependent Claim
25 words
A process according to claim 1 in which the visbreaking is carried out at a severity from 500 to 800 ERT seconds at 800° F.
Claim 10
Dependent Claim
30 words
A process according to claim 1 in which the visbreaking is carried out at a temperature from 350° to 485° C. with a residence time of 1 to 60 minutes.
Claim 11
Dependent Claim
30 words
A process according to claim 9 in which the visbreaking is carried out at a temperature from 425° to 455° C. with a residence time of 7 to 20 minutes.
Claim 12
Dependent Claim
88 words
In a process for visbreaking a heavy petroleum residual oil, the improvement comprising visbreaking the oil in the presence of 0.1 to 50 weight percent, based on the heavy oil, of a non-hydrotreated hydrogen donor solvent derived from a thermal or fluidized catalytic cracking process and in the absence of added free hydrogen and the hydrogen donor material being characterized by a hydrogen content distribution, in which H Ar and H alpha are each at least 20 percent of the total hydrogen content of the hydrogen donor material.
Claim 13
Dependent Claim
88 words
In a process for visbreaking a heavy petroleum residual oil, the improvement comprising visbreaking the oil in the presence of 0.1 to 50 weight percent, based on the heavy oil, of a non-hydrotreated hydrogen donor solvent derived from a thermal or fluidized catalytic cracking process and in the absence of added free hydrogen and the hydrogen donor material being characterized by a hydrogen content distribution, in which H Ar and H alpha are each at least 20 percent of the total hydrogen content of the hydrogen donor material.
Claim 14
Dependent Claim
25 words
A process according to claim 11 in which the visbreaking is carried out at a severity of up to 800 seconds ERT at 800° F.
Claim 15
Dependent Claim
19 words
A process according to claim 12 in which the visbreaking severity is from about 500 to 800 ERT seconds.
Claim 16
Dependent Claim
25 words
A process according to claim 11 in which the amount of the hydrogen donor is from 0.1 to 20 weight percent of the heavy oil.
Claim 17
Dependent Claim
31 words
A process according to claim 11 in which the H Ar and H alpha content of the hydrogen donor are from 20 to 50 percent each of the total hydrogen content.
Claim 18
Dependent Claim
107 words
A process for visbreaking a heavy petroleum residual oil which comprises subjecting the oil to an elevated temperature for a period of time corresponding to an equivalent reaction time of 250 to 1500 ERT seconds at 800° F., in the absence of added free hydrogen and in the presence of from 0.1 to 50 weight percent, based on the residual oil, of a hydro-aromatic hydrogen donor solvent having a content of H Ar and H alpha each of at least 20 percent of the total hydrogen content of the solvent, and recovering a fuel oil product having a viscosity lower than that of the starting residual oil.
Claim 19
Dependent Claim
107 words
A process for visbreaking a heavy petroleum residual oil which comprises subjecting the oil to an elevated temperature for a period of time corresponding to an equivalent reaction time of 250 to 1500 ERT seconds at 800° F., in the absence of added free hydrogen and in the presence of from 0.1 to 50 weight percent, based on the residual oil, of a hydro-aromatic hydrogen donor solvent having a content of H Ar and H alpha each of at least 20 percent of the total hydrogen content of the solvent, and recovering a fuel oil product having a viscosity lower than that of the starting residual oil.
Claim 20
Dependent Claim
22 words
A process according to claim 16, in which the visbreaking is carried out at 400 to 1200 ERT seconds at 800° F.
Claim 21
Dependent Claim
19 words
A process according to claim 17, in which the visbreaking is carried out at 500 to 800 ERT seconds.
Claim 22
Dependent Claim
23 words
A process according to claim 1, in which the visbreaking is carried out at 350° to 485° C. for 1 to 60 minutes.
Claim 23
Dependent Claim
23 words
A process according to claim 19 in which the visbreaking is carried out at 425° to 455° C. for 7 to 20 minutes.
Claim 24
Dependent Claim
31 words
A process according to claim 16 in which the visbreaking is carried out in the presence of 0.1 to 20 weight percent, based on the residual oil, of the hydro-aromatic solvent.
Claim 25
Dependent Claim
24 words
A process according to claim 21 in which the amount of hydro-aromatic solvent is 10 to 20 weight percent, based on the residual oil.
Claim 26
Dependent Claim
38 words
A process according to claim 16 in which the hydro-aromatic solvent has a H Ar content from 20 to 50% and a H alpha content from 20 to 50%, based on total hydrogen content of the hydro-aromatic solvent.
Claim 27
Dependent Claim
36 words
A process according to claim 23 in which the hydro-aromatic solvent has a H Ar content of at least 2.0 weight percent and a H alpha of at least 1.9 weight percent, based on the solvent.
Claim 28
Dependent Claim
24 words
A process according to claim 16 in which the hydro-aromatic solvent is a non-hydrotreated solvent derived from the catalytic cracking of a petroleum oil.
Claim 29
Dependent Claim
28 words
A process according to claim 25 in which the hydro-aromatic solvent is selected from FCC main column bottoms, TCC syntower bottoms, clarified slurry oil and light cycle oil.
Claim 30
Dependent Claim
21 words
A process according to claim 26 in which the hydro-aromatic solvent is FCC light cycle oil or TCC light cycle oil.
Claim 31
Dependent Claim
15 words
A process according to claim 16 in which the hydroaromatic solvent is a non-petroleum material.
Claim 32
Dependent Claim
14 words
A process according to claim 28 in which the hydroaromatic solvent comprises coal liquids.
Claim 33
Dependent Claim
15 words
A process according to claim 29 in which the coal liquids comprises SRC recycle oil.
Claim 34
Dependent Claim
105 words
A process for thermal cracking a heavy oil which comprises subjecting the oil to an elevated temperature for a period of time corresponding to an equivalent reaction time of 1500 to 15,000 ERT seconds at 427° C., in the absence of added free hydrogen and in the presence of from 0.1 to 50 weight percent, based on the heavy oil, of a non-hydrotreated solvent derived from the cracking of a petroleum oil, which has a content of H Ar and H alpha hydrogen each of at least 20 percent of the total hydrogen content of the solvent and recovering lighter products from the reaction mixture.
Claim 35
Dependent Claim
105 words
A process for thermal cracking a heavy oil which comprises subjecting the oil to an elevated temperature for a period of time corresponding to an equivalent reaction time of 1500 to 15,000 ERT seconds at 427° C., in the absence of added free hydrogen and in the presence of from 0.1 to 50 weight percent, based on the heavy oil, of a non-hydrotreated solvent derived from the cracking of a petroleum oil, which has a content of H Ar and H alpha hydrogen each of at least 20 percent of the total hydrogen content of the solvent and recovering lighter products from the reaction mixture.
Claim 36
Dependent Claim
32 words
A process according to claim 31 in which the solvent has an H Ar and H alpha content of 20 to 50 percent each of the total hydrogen content of the solvent.
Claim 37
Dependent Claim
39 words
A process according to claim 31 in which the H Ar content of the solvent is at least 2.0 weight percent and the H alpha content of the solvent is at least 1.9 weight percent, based on the solvent.
Claim 38
Dependent Claim
24 words
A process according to claim 31 in which the amount of the solvent is from 0.1 to 20 weight percent of the heavy oil.
Claim 39
Dependent Claim
23 words
A process according to claim 31 in which the solvent comprises a hydrocarbon fraction produced by the catalytic cracking of a petroleum oil.
References Cited (Backward Citations)
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FR2381093A1
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US4434045A
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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) | 1989-10-06 | 1990-04-07 | 1990-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-10-06 | 1994-04-07 | 1994-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-10-06 | 1998-04-07 | 1998-10-07 | $7700.00 | Window Closed / Lapsed |