US4397736A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrotreating supercritical solvent extracts in the presence of alkane extractants
Assignee: Phillips Petroleum Co
•
Filing: 1981-04-01
•
Granted: 1983-08-09
•
Expires: 2001-04-01
Abstract
Abstract A process of recovering the hydrocarbon values from low organic carbon content deposits comprises the hydrotreating of hydrocarbons from those deposits in the presence of supercritical alkane-containing solv
Inventors
- 👤 Jim Y. Low
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 08:40
CPC Classifications
C; C10; C10G; C10G1/00; C10G1/002; B; B01; B01D; B01D11/00; B01D11/02; B01D11/0203; C10G1/04; Y; Y10; Y10S; Y10S208/00; Y10S208/952
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
82 words
A process for recovering hydrocarbons from naturally-occurring low organic carbon content carbonaceous material selected from oil shale, tar sand, and mixtures thereof comprising the step of contacting said material under supercritical conditions with an added mixture of structurally analogous hydrocarbon solvents wherein at least one solvent is aromatic, at least one solvent is cycloaliphatic and is structurally analogous to the aromatic solvent, and wherein the cycloaliphatic solvent is present in an amount of 2-10% by weight based on the total solvent weight.
Claim 2
Dependent Claim
82 words
A process for recovering hydrocarbons from naturally-occurring low organic carbon content carbonaceous material selected from oil shale, tar sand, and mixtures thereof comprising the step of contacting said material under supercritical conditions with an added mixture of structurally analogous hydrocarbon solvents wherein at least one solvent is aromatic, at least one solvent is cycloaliphatic and is structurally analogous to the aromatic solvent, and wherein the cycloaliphatic solvent is present in an amount of 2-10% by weight based on the total solvent weight.
Claim 3
Dependent Claim
26 words
The process of claim 1 wherein the cycloaliphatic solvent is present in an amount of 5 to 10% by weight based on the total solvent weight.
Claim 4
Dependent Claim
25 words
The process of claims 1 or 2 wherein the aromatic solvent is toluene or benzene and the structurally analogous cycloaliphatic solvent is methylcyclohexane or cyclohexane.
Claim 5
Dependent Claim
28 words
The process of claims 1 or 2 further comprising the steps of hydrotreating the material in the presence of the solvent mixture and recovering the resultant hydrotreated product.
Claim 6
Dependent Claim
13 words
The process of claim 4 wherein the solvent mixture comprises toluene and methylcyclohexane.
References Cited (Backward Citations)
US2118940A
Cited
US2270674A
Cited
GB493307A
Cited
US2793104A
Cited
US3421868A
Cited
UST861027I4
Cited
US3607717A
Cited
US3594305A
Cited
US3813329A
Cited
US3929193A
Cited
US4019975A
Cited
US3997424A
Cited
US3970541A
Cited
US4108760A
Cited
US4083769A
Cited
US4155832A
Cited
US4158638A
Cited
US4303495A
Cited
US4197183A
Cited
US4297200A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-08-08 | 1987-02-07 | 1987-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-08-08 | 1991-02-07 | 1991-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-08-08 | 1995-02-07 | 1995-08-09 | $7700.00 | Window Closed / Lapsed |