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Class Information
Number: 208/429
Name: Mineral oils: processes and products > By treatment of solid mineral, e.g., coal liquefaction, etc. > Including contact with extraneous additive other than hydrogen, e.g., solvent, etc. > Distinct addition zones
Description: Subject matter in which additive comes into contact with feedstock in a plurality of distinct contact zones.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 5936134 |
Method for obtaining storable products of calorific energy and synthetical oils, by processing waste rubber materials with coal |
Aug. 10, 1999 |
| 5571403 |
Process for extracting hydrocarbons from diatomite |
Nov. 5, 1996 |
| 5120429 |
Co-processing of carbonaceous solids and petroleum oil |
Jun. 9, 1992 |
| 5059307 |
Process for upgrading coal |
Oct. 22, 1991 |
| 5047143 |
Method for converting lower grade uintaite to higher grade materials |
Sep. 10, 1991 |
| 5015366 |
Process and apparatus for coal hydrogenation |
May. 14, 1991 |
| 4828031 |
In situ chemical stimulation of diatomite formations |
May. 9, 1989 |
| 4798668 |
Extraction of hydrocarbon-containing solids |
Jan. 17, 1989 |
| 4764270 |
Simultaneous upgrading of tar sand bitumen and coal by corefining |
Aug. 16, 1988 |
| 4698149 |
Enhanced recovery of hydrocarbonaceous fluids oil shale |
Oct. 6, 1987 |
| 4695373 |
Extraction of hydrocarbon-containing solids |
Sep. 22, 1987 |
| 4664788 |
Multi-stage coal liquefaction and fractionation method |
May. 12, 1987 |
| 4639310 |
Process for the production of reformer feed and heating oil or diesel oil from coal by liquid-phase hydrogenation and subsequent gas-phase hydrogenation |
Jan. 27, 1987 |
| 4587004 |
Process for beneficiating oil-shale |
May. 6, 1986 |
| 4587005 |
Process for beneficiating Rundle oil-shale |
May. 6, 1986 |
| 4545891 |
Extraction and upgrading of fossil fuels using fused caustic and acid solutions |
Oct. 8, 1985 |
| 4539093 |
Extraction process and apparatus for hydrocarbon containing ores |
Sep. 3, 1985 |
| 4539094 |
Extraction of depolymerized carbonaceous material using supercritical ammonia |
Sep. 3, 1985 |
| 4539095 |
Aqueous alkali depolymerization of coal with a quinone |
Sep. 3, 1985 |
| 4518480 |
Process for the efficient utilization of solvent modified oil shales |
May. 21, 1985 |
| 4502940 |
Method for extracting caking coals |
Mar. 5, 1985 |
| 4491512 |
Recovery of oil from oil-bearing carbonates |
Jan. 1, 1985 |
| 4490213 |
Coal conversion processes |
Dec. 25, 1984 |
| 4469584 |
Process for pyrolyzing oil-shale |
Sep. 4, 1984 |
| 4449586 |
Process for the recovery of hydrocarbons from oil shale |
May. 22, 1984 |
| 4440622 |
Integration of short-contact-time liquefaction and critical solvent deashing with gasification through methanol-to-gasoline |
Apr. 3, 1984 |
| 4431510 |
Process for producing hydrogen-enriched hydrocarbonaceous products from coal |
Feb. 14, 1984 |
| 4428820 |
Coal liquefaction process with controlled recycle of ethyl acetate-insolubles |
Jan. 31, 1984 |
| 4401551 |
Solvent extraction method |
Aug. 30, 1983 |
| 4396488 |
Process for coal liquefaction employing a superior coal liquefaction process solvent |
Aug. 2, 1983 |
| 4389950 |
Process for burning retorted oil shale and improved combustor |
Jun. 28, 1983 |
| 4389300 |
Solvent extraction method |
Jun. 21, 1983 |
| 4387015 |
Coal liquefaction quenching process |
Jun. 7, 1983 |
| 4376693 |
Solid liquid extraction |
Mar. 15, 1983 |
| 4376032 |
Coal Liquefaction desulfurization process |
Mar. 8, 1983 |
| 4374023 |
Process for recovering hydrocarbons from a diatomite-type ore |
Feb. 15, 1983 |
| 4366043 |
Method and apparatus for heat processing pulverized brown coal |
Dec. 28, 1982 |
| 4322283 |
Coal conversion in the presence of added hydrogen sulfide |
Mar. 30, 1982 |
| 4299684 |
Demineralization of coal |
Nov. 10, 1981 |
| 4269692 |
Coal refining |
May. 26, 1981 |
| 4244700 |
Method of and apparatus for heat processing of pulverized solid fuel |
Jan. 13, 1981 |
| 4225420 |
Process for improving soluble coal yield in a coal deashing process |
Sep. 30, 1980 |
| 4211632 |
Method for heat processing of pulverized brown coal |
Jul. 8, 1980 |
| 4196072 |
Hydroconversion process |
Apr. 1, 1980 |
| 4191628 |
Process for removal of mineral particulates from coal-derived liquids |
Mar. 4, 1980 |
| 4189371 |
Multiple-stage hydrogen-donor coal liquefaction process |
Feb. 19, 1980 |
| 4174263 |
Recovery of bitumen from tar sands |
Nov. 13, 1979 |
| 4172025 |
Process for secondary recovery of bitumen in hot water extraction of tar sand |
Oct. 23, 1979 |
| 4167470 |
Process and apparatus for solvent extraction of oil from oil-containing diatomite ore |
Sep. 11, 1979 |
| 4162956 |
Coal deashing process having improved solvent recovery techniques |
Jul. 31, 1979 |
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