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Class Information
Number: 208/424
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
Description: Subject matter in which a procedure, more than mere "separation" is claimed for removal of solids from the liquid product of the process.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7419585 |
Process for upgrading residua |
Sep. 2, 2008 |
| 7112311 |
Cooling method of hydrotreating plant and cooling unit therefor |
Sep. 26, 2006 |
| 6689925 |
Conversion of drilling waste to fuel |
Feb. 10, 2004 |
| 6549817 |
Method for regulating centrifuges for dehydrating wastewater sludge, using fuzzy logic |
Apr. 15, 2003 |
| 6547960 |
Oil separating apparatus for oil containing substance and method therefor |
Apr. 15, 2003 |
| 5936134 |
Method for obtaining storable products of calorific energy and synthetical oils, by processing waste rubber materials with coal |
Aug. 10, 1999 |
| 5917102 |
Device for depolymerizing used and waste plastics |
Jun. 29, 1999 |
| 5879541 |
Apparatus and method for removing oil from oil-coated particles |
Mar. 9, 1999 |
| 5846314 |
Process for treating a waste material resulting from an oil recovery from tar sands process |
Dec. 8, 1998 |
| 5605618 |
Process for preparing nitrogen-containing isotropic pitch and nitrogen-containing isotropic pitch |
Feb. 25, 1997 |
| 5549831 |
Method for processing chemical cleaning solvent waste |
Aug. 27, 1996 |
| 5534137 |
Process for de-ashing coal tar |
Jul. 9, 1996 |
| 5492618 |
Recovery of hard acids and soft bases from decomposed coal |
Feb. 20, 1996 |
| 5489376 |
Recovery of hard acids and soft bases from decomposed coal |
Feb. 6, 1996 |
| 5489377 |
Recovery of hard acids and soft bases from decomposed coal |
Feb. 6, 1996 |
| 5337965 |
Method and apparatus for recycling asphalt based roofing material |
Aug. 16, 1994 |
| 5298157 |
Coal depolymerization utilizing hard acid/soft base |
Mar. 29, 1994 |
| 5296133 |
Low ash coal products from depolymerized coal |
Mar. 22, 1994 |
| 5294349 |
Coal depolymerization and hydroprocessing |
Mar. 15, 1994 |
| 5269910 |
Method of coil liquefaction by hydrogenation |
Dec. 14, 1993 |
| 5110450 |
Coal extract hydroconversion process comprising solvent enhanced carbon monoxide pretreatment |
May. 5, 1992 |
| 5091076 |
Acid treatment of kerogen-agglomerated oil shale |
Feb. 25, 1992 |
| 5041210 |
Oil shale retorting with steam and produced gas |
Aug. 20, 1991 |
| 5041209 |
Process for removing heavy metal compounds from heavy crude oil |
Aug. 20, 1991 |
| 5013428 |
Recovery of oil from a shale containing the same |
May. 7, 1991 |
| 5009770 |
Simultaneous upgrading and dedusting of liquid hydrocarbon feedstocks |
Apr. 23, 1991 |
| 4994175 |
Syncrude dedusting extraction |
Feb. 19, 1991 |
| 4944867 |
Process to secure oil, gas, and by-products from pyrobetuminous shale and other matter impregnated with hydrocarbons |
Jul. 31, 1990 |
| 4919792 |
Clarification of slurry oil |
Apr. 24, 1990 |
| 4888108 |
Separation of fine solids from petroleum oils and the like |
Dec. 19, 1989 |
| 4863586 |
Process for recovery of low-temperature carbonization oil |
Sep. 5, 1989 |
| 4842715 |
Novel technique for rendering oily sludges environmentally acceptable |
Jun. 27, 1989 |
| 4812225 |
Method and apparatus for treatment of oil contaminated sludge |
Mar. 14, 1989 |
| 4773988 |
Arsenic removal from shale oil by addition of basic materials |
Sep. 27, 1988 |
| 4737267 |
Oil shale processing apparatus and method |
Apr. 12, 1988 |
| 4705622 |
Process for dedusting shale-oil |
Nov. 10, 1987 |
| 4702820 |
Pretreatment by alkaline wetting and holding at temperature of natural materials having an argillaceous gangue containing combustible elements |
Oct. 27, 1987 |
| 4701263 |
Use of amine neutralized sulfonated polystyrenes for particle flocculation |
Oct. 20, 1987 |
| 4696750 |
Flocculation of particles by polymers that precipitate out of solution |
Sep. 29, 1987 |
| 4695372 |
Conditioning of carbonaceous material prior to physical beneficiation |
Sep. 22, 1987 |
| 4687569 |
Steam stripping process for solids separation in oil shale processing |
Aug. 18, 1987 |
| 4675102 |
Process for producing a diesel fuel from medium heavy oil obtained from coal |
Jun. 23, 1987 |
| 4670104 |
Polar solvent dedusting |
Jun. 2, 1987 |
| 4664788 |
Multi-stage coal liquefaction and fractionation method |
May. 12, 1987 |
| 4597851 |
Process for the utilization of waste waters in the hydrogenation of coal |
Jul. 1, 1986 |
| 4584087 |
Recovery of a carbonaceous liquid with a low fines content |
Apr. 22, 1986 |
| 4579173 |
Magnetized drive fluids |
Apr. 1, 1986 |
| 4572777 |
Recovery of a carbonaceous liquid with a low fines content |
Feb. 25, 1986 |
| 4571294 |
Process for extracting hydrocarbons from hydrocarbon bearing ores |
Feb. 18, 1986 |
| 4565622 |
Method of liquefying brown coal |
Jan. 21, 1986 |
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