US3884829A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Methods and compositions for refining bituminous froth recovered from tar sands
Assignee: Great Canadian Oil Sands Ltd
•
Filing: 1972-11-14
•
Granted: 1975-05-20
•
Expires: 1992-11-14
Abstract
Abstract A method for refining emulsion-containing bituminous froth having water and mineral matter impurities recovered from tar sands via hot water extraction comprising adding a deemulsifying quantity of a C3 to C7 ketone to the froth and thereafter centrifuging the froth-ketone mixture to provide a froth product substantially reduced in water, mineral matter and emulsions.
Inventors
- 👤 James L Moyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:34
CPC Classifications
B; B01; B01D; B01D17/00; B01D17/02; B01D17/04; B01D17/047; C; C10; C10C; C10C3/00; C10C3/08; C10G; C10G1/00; C10G1/04; C10G1/045
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
64 words
AN IMPROVED DILUENT SUITABLE FOR IMPROVING THE PROCESSABILITY OF BITUMINOUS FROTH CONSISTING OF: A. 20 TO 80 PERCENT PETROLEUM NAPHTHA CHARACTERIZED AS BOILING IN THE RANGE OF 150* TO 500*F. AND CONTAINING 5 TO 50 PERCENT AROMATIC HYDROCARBONS, 0 TO 50 PERCENT OLEFINS, 50 TO 95 PERCENT SATURATED HYDROCARBONS AND B. 20 TO 80 PERCENT OF A C3 TO C7 KETONE AND MIXTURES THEREOF.
Claim 2
Dependent Claim
64 words
AN IMPROVED DILUENT SUITABLE FOR IMPROVING THE PROCESSABILITY OF BITUMINOUS FROTH CONSISTING OF: A. 20 TO 80 PERCENT PETROLEUM NAPHTHA CHARACTERIZED AS BOILING IN THE RANGE OF 150* TO 500*F. AND CONTAINING 5 TO 50 PERCENT AROMATIC HYDROCARBONS, 0 TO 50 PERCENT OLEFINS, 50 TO 95 PERCENT SATURATED HYDROCARBONS AND B. 20 TO 80 PERCENT OF A C3 TO C7 KETONE AND MIXTURES THEREOF.
Claim 3
Dependent Claim
21 words
A composition according to claim 1 wherein said ketone is selected from the group consisting of acetone, 2-butanone, 2-pentanone and 3-pentanone.
Claim 4
Independent Claim
55 words
A METHOD FOR UPGRADING EMULSION CONTAINING BITUMINOUS FROTH CONTAINING WATER AND MINERAL IMPURITIES WHICH COMPRISES DILUTING THE FROTH WITH PETROLEUM NAPHTHA CONTAINING 10 TO 50 PERCENT BY VOLUME OF A C3 C7 KETONE AND THEREAFTER CENTRIFUGING THE DILUTED FROTH AND RECOVERING A FROTH PRODUCT FREE OF EMULSIONS AND SUBSTANTIALLY REDUCED IN WATER AND MINERAL MATTER.
Claim 5
Independent Claim
55 words
A METHOD FOR UPGRADING EMULSION CONTAINING BITUMINOUS FROTH CONTAINING WATER AND MINERAL IMPURITIES WHICH COMPRISES DILUTING THE FROTH WITH PETROLEUM NAPHTHA CONTAINING 10 TO 50 PERCENT BY VOLUME OF A C3 C7 KETONE AND THEREAFTER CENTRIFUGING THE DILUTED FROTH AND RECOVERING A FROTH PRODUCT FREE OF EMULSIONS AND SUBSTANTIALLY REDUCED IN WATER AND MINERAL MATTER.
Claim 6
Independent Claim
83 words
A method for upgrading a bitumen froth recovered from tar sands via hot water extraction process which comprises: a. mixing said bituminous froth containing 35 to 45 percent water and 1 to 5 percent mineral matter with a petroleum naphtha boiling in the range of 150* to 500* F. and containing 10 to 50 percent C3 to C7 ketones, b. centrifuging the froth-diluent mixture and c. recovering a diluted bitumen froth substantially free of emulsions and substantially reduced in water and mineral matter.
Claim 7
Independent Claim
83 words
A method for upgrading a bitumen froth recovered from tar sands via hot water extraction process which comprises: a. mixing said bituminous froth containing 35 to 45 percent water and 1 to 5 percent mineral matter with a petroleum naphtha boiling in the range of 150* to 500* F. and containing 10 to 50 percent C3 to C7 ketones, b. centrifuging the froth-diluent mixture and c. recovering a diluted bitumen froth substantially free of emulsions and substantially reduced in water and mineral matter.
Claim 8
Dependent Claim
21 words
A method according to claim 3 wherein the ketone is selected from the group consisting of acetone, 2-butanone, 2-pentanone and 3-pentanone.
Claim 9
Dependent Claim
21 words
A method according to claim 4 wherein the ketone is selected from the group consisting of acetone, 2-butanone, 2-pentanone and 3-pentanone.
Claim 10
Independent Claim
103 words
A method for upgrading emulsion containing bituminous froth containing water and mineral impurities comprising: a. adding to the froth a liquid diluent characterized as containing i. 20 to 80 volume percent of a C3 to C7 ketone and mixtures thereof and ii. 20 to 80 volume percent of petroleum naphtha characterized as boiling in the range of 150* to 500* F. and containing 5 to 50 percent aromatic hydrocarbons, 0 to 50 percent olefins and 50 to 95 percent saturated hydrocarbons; b. centrifuging said froth and c. recovering a froth product substantially free of emulsions and substantially reduced in water and mineral matter.
Claim 11
Independent Claim
103 words
A method for upgrading emulsion containing bituminous froth containing water and mineral impurities comprising: a. adding to the froth a liquid diluent characterized as containing i. 20 to 80 volume percent of a C3 to C7 ketone and mixtures thereof and ii. 20 to 80 volume percent of petroleum naphtha characterized as boiling in the range of 150* to 500* F. and containing 5 to 50 percent aromatic hydrocarbons, 0 to 50 percent olefins and 50 to 95 percent saturated hydrocarbons; b. centrifuging said froth and c. recovering a froth product substantially free of emulsions and substantially reduced in water and mineral matter.
Claim 12
Dependent Claim
35 words
A method according to claim 7 wherein said emulsion containing bituminous froth is recovered via hot water extraction from tar sands and contains 35 to 45 percent water and 1 to 5 percent mineral matter.
Claim 13
Dependent Claim
21 words
A method according to claim 7 wherein the ketone is selected from the group consisting of acetone, 2-butanone, 2-pentanone, and 3-pentanone.
Claim 14
Dependent Claim
21 words
A method according to claim 8 wherein the ketone is selected from the group consisting of acetone, 2-butanone, 2-pentanone, and 3-pentanone.
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) | 1978-05-19 | 1978-11-18 | 1979-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-19 | 1982-11-18 | 1983-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-19 | 1986-11-18 | 1987-05-20 | $7700.00 | Window Closed / Lapsed |