US4357230A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Extraction of oil using amides
Assignee: Carrier Corp
•
Filing: 1980-09-25
•
Granted: 1982-11-02
•
Expires: 2000-09-25
Abstract
Abstract This invention relates to the extraction of oil shales and tar sands using an amide to effect extraction of kerogen and bitumenous materials from the shale or sand. Extraction may be at ambient conditions, if desired.
Inventors
- 👤 Howard W. Sibley
- 👤 Joseph A. Bzdula
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:37
CPC Classifications
C; C10; C10G; C10G1/00; C10G1/04
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
35 words
In a process for extracting organic materials from oil shale or tar sand by contacting the same with an organic extractant, the improvement wherein said organic extractant is an aliphatic amide comprisng the moiety ##STR2##
Claim 2
Dependent Claim
35 words
In a process for extracting organic materials from oil shale or tar sand by contacting the same with an organic extractant, the improvement wherein said organic extractant is an aliphatic amide comprisng the moiety ##STR2##
Claim 3
Dependent Claim
31 words
The process of claim 1 wherein said amide is represented by the formula: ##STR3## where R 1 , R 2 and R 3 comprise in total 4 to 20 carbon atoms.
Claim 4
Dependent Claim
42 words
The process of claim 2 wherein at least two of R 1 , R 2 and R 3 are aliphatic groups, with the proviso that R 3 is an aliphatic group but one of R 1 or R 2 can be hydrogen.
Claim 5
Dependent Claim
26 words
The process of claim 3 wherein R 1 and R 2 are methyl and R 3 is an aliphatic group of 4 to 10 carbon atoms.
Claim 6
Dependent Claim
41 words
The process of claim 2 wherein extraction is at a temperature of about 80° to about 350° F., a pressure of from about 1 to about 1.5 atmospheres and for a period of from about 30 minutes to about 2 hours.
Claim 7
Dependent Claim
11 words
The process of claim 5 wherein said oil shale is extracted.
Claim 8
Dependent Claim
11 words
The process of claim 5 wherein said tar sand is extracted.
Claim 9
Dependent Claim
18 words
The process of claim 6 wherein said amide is removed from said oil shale subsequent to said extraction.
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) | 1985-11-01 | 1986-05-03 | 1986-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-11-01 | 1990-05-03 | 1990-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-11-01 | 1994-05-03 | 1994-11-02 | $7700.00 | Window Closed / Lapsed |