Patent US3779895A successfully refreshed from Google Patents.
US3779895A
Expired / Lapsed
US
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Treatment of heavy petroleum oils
Assignee: Texaco Inc
•
Filing: 1971-12-23
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Granted: 1973-12-18
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Expires: 1991-12-23
Abstract
Abstract Metal and asphaltene-containing heavy petroleum oils are subjected to high temperature steam treatment and then contacted with a deasphalting solvent. The product is particularly suited for further catalytic treatment.
Inventors
- 👤 R Wilson
- 👤 E Cole
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:37
CPC Classifications
C; C10; C10G; C10G67/00; C10G67/02; C10G67/04; C10G67/0454; C10G67/0463; C10G31/00; C10G31/08; C10G2300/00; C10G2300/10; C10G2300/107
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
26 words
The process of claim 1 in which contact of the treated fraction with the solvent is effected at a temperature between 50* F. and 400* F.
Claim 2
Dependent Claim
23 words
The process of claim 1 in which the stable water-asphaltene emulsion is formed on cooling said product to a temperature below 400* F.
Claim 3
Dependent Claim
18 words
The process of claim 3 in which the solvent contacting is effected in the presence of said emulsion.
Claim 4
Dependent Claim
20 words
The process of claim 3 in which the emulsion is removed prior to contacting the H2O treated fraction with solvent.
Claim 5
Dependent Claim
11 words
The process of claim 1 in which the solvent is N-methyl-2-pyrrolidone.
Claim 6
Dependent Claim
19 words
The process of claim 1 in which the solvent is a low molecular weight paraffin containing 3-10 carbon atoms.
Claim 7
Dependent Claim
25 words
The process of claim 1 in which the solvent de-asphalted oil is subjected to catalytic treatment at a temperature between 700* F. and 950* F.
Claim 8
Dependent Claim
12 words
The process of claim 8 in which the catalytic treatment is cracking.
Claim 9
Dependent Claim
12 words
The process of claim 8 in which the catalytic treatment is hydrocracking.
Claim 10
Dependent Claim
12 words
The process of claim 8 in which the catalytic treatment is hydrodesulfurization.
Claim 11
Dependent Claim
49 words
The process of claim 1 in which the heavy petroleum fraction is introduced into a dispersing zone at a rate between 0.5 and 5.0 volumes of heavy petroleum fraction per volume of dispersing zone per hour and the H2O is introduced at a rate between 0.1 and 5.0 v/v/hr.
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) | 1976-12-17 | 1977-06-18 | 1977-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-17 | 1981-06-18 | 1981-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-17 | 1985-06-18 | 1985-12-18 | $7700.00 | Window Closed / Lapsed |