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Class Information
Number: 208/425
Name: Mineral oils: processes and products > By treatment of solid mineral, e.g., coal liquefaction, etc. > Specified procedure to improve separation of solids from liquid product > Including centrifugation, filtering, flotation or vibration
Description: Subject matter wherein the specified procedure includes the use of centrifugal force, shaking, or the attachment of gas bubbles to a solid, or the passage of liquid through a septum which holds back solids of a certain size.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7585407 |
Processing asphaltene-containing tailings |
Sep. 8, 2009 |
| 7438189 |
Bituminous froth inclined plate separator and hydrocarbon cyclone treatment process |
Oct. 21, 2008 |
| 7438807 |
Bituminous froth inclined plate separator and hydrocarbon cyclone treatment process |
Oct. 21, 2008 |
| 7416671 |
Separation and recovery of bitumen oil from tar sands |
Aug. 26, 2008 |
| 7141162 |
Bituminous froth inclined plate separator and hydrocarbon cyclone treatment process |
Nov. 28, 2006 |
| 6547960 |
Oil separating apparatus for oil containing substance and method therefor |
Apr. 15, 2003 |
| 6549817 |
Method for regulating centrifuges for dehydrating wastewater sludge, using fuzzy logic |
Apr. 15, 2003 |
| 6110359 |
Method for extracting bitumen from tar sands |
Aug. 29, 2000 |
| 5879541 |
Apparatus and method for removing oil from oil-coated particles |
Mar. 9, 1999 |
| 5534137 |
Process for de-ashing coal tar |
Jul. 9, 1996 |
| 5496465 |
Vibrating bed coal pyrolysis system |
Mar. 5, 1996 |
| 5460270 |
Oil sand extraction process with in-line middlings aeration and recycle |
Oct. 24, 1995 |
| 5337965 |
Method and apparatus for recycling asphalt based roofing material |
Aug. 16, 1994 |
| 5242580 |
Recovery of hydrocarbons from hydrocarbon contaminated sludge |
Sep. 7, 1993 |
| 5223148 |
Process for increasing the bitumen content of oil sands froth |
Jun. 29, 1993 |
| 5192423 |
Apparatus and method for separation of wet particles |
Mar. 9, 1993 |
| 5192422 |
Oil shale beneficiation process using a spiral separator |
Mar. 9, 1993 |
| 5186820 |
Process for separating bitumen from tar sands |
Feb. 16, 1993 |
| 5169518 |
Recovery of petroleum from tar sands |
Dec. 8, 1992 |
| 5122259 |
Separation of oil and precious metals from mined oil-bearing rock material |
Jun. 16, 1992 |
| 5118408 |
Reducing the water and solids contents of bitumen froth moving through the launder of a spontaneous flotation vessel |
Jun. 2, 1992 |
| 5114568 |
Reclamation system for contaminated material |
May. 19, 1992 |
| 5071540 |
Coal hydroconversion process comprising solvent extraction and combined hydroconversion and upgrading |
Dec. 10, 1991 |
| 5066388 |
Process and apparatus for disengaging and separating bitumen from pulverized tar sands using selective cohesion |
Nov. 19, 1991 |
| 5019245 |
Method for recovery of hydrocarbons form contaminated soil or refuse materials |
May. 28, 1991 |
| 4994175 |
Syncrude dedusting extraction |
Feb. 19, 1991 |
| 4946597 |
Low temperature bitumen recovery process |
Aug. 7, 1990 |
| 4859317 |
Purification process for bitumen froth |
Aug. 22, 1989 |
| 4828688 |
Method for separation of heterogeneous phases |
May. 9, 1989 |
| 4820405 |
Method of liquefying coal |
Apr. 11, 1989 |
| 4812225 |
Method and apparatus for treatment of oil contaminated sludge |
Mar. 14, 1989 |
| 4783268 |
Microbubble flotation process for the separation of bitumen from an oil sands slurry |
Nov. 8, 1988 |
| 4714543 |
Method of treating brown coal for liquefaction |
Dec. 22, 1987 |
| 4707275 |
Process for separating water and solids from fuels |
Nov. 17, 1987 |
| 4602991 |
Coal liquefaction process |
Jul. 29, 1986 |
| 4594141 |
Conversion of high boiling organic materials to low boiling materials |
Jun. 10, 1986 |
| 4576708 |
Beneficiation of shale kerogen and its conversion into shale oil |
Mar. 18, 1986 |
| 4545892 |
Treatment of primary tailings and middlings from the hot water extraction process for recovering bitumen from tar sand |
Oct. 8, 1985 |
| 4539097 |
Method for filtering solvent and tar sand mixtures |
Sep. 3, 1985 |
| 4536278 |
Shale oil stabilization with a hydrogen donor quench |
Aug. 20, 1985 |
| 4536277 |
Shale oil stabilization with a hydrogen donor quench and a hydrogen transfer catalyst |
Aug. 20, 1985 |
| 4529497 |
Disposal of spent oil shale and other materials |
Jul. 16, 1985 |
| 4523986 |
Liquefaction of coal |
Jun. 18, 1985 |
| 4510038 |
Coal liquefaction using vacuum distillation and an external residuum feed |
Apr. 9, 1985 |
| 4495032 |
Split hub wheel apparatus |
Jan. 22, 1985 |
| 4495056 |
Oil shale retorting and retort water purification process |
Jan. 22, 1985 |
| 4487682 |
Coal extraction |
Dec. 11, 1984 |
| 4473461 |
Centrifugal drying and dedusting process |
Sep. 25, 1984 |
| 4470899 |
Bitumen recovery from tar sands |
Sep. 11, 1984 |
| 4466882 |
Simultaneous beneficiation and treatment of oil shale |
Aug. 21, 1984 |
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