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Class Information
Number: 208/415
Name: Mineral oils: processes and products > By treatment of solid mineral, e.g., coal liquefaction, etc. > Including contact of feed with liquid produced in the process, i.e., recycle
Description: Subject matter wherein material derived from the solid feed is withdrawn from a later stage of the process and contacted, at an earlier stage of the process, with the solid feed to the process or with other feed-derived material.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7285694 |
Thermobaric molecular fractionation |
Oct. 23, 2007 |
| 6936159 |
Process for recovering hydrocarbons from a carbon containing material |
Aug. 30, 2005 |
| 6060631 |
Process for the conversion of plastic to produce a synthetic crude oil |
May. 9, 2000 |
| 5917102 |
Device for depolymerizing used and waste plastics |
Jun. 29, 1999 |
| 5573556 |
Conversion of solid carbonaceous material using polyoxoanions |
Nov. 12, 1996 |
| 5364996 |
Partial oxidation of scrap rubber tires and used motor oil |
Nov. 15, 1994 |
| 5338442 |
Process for converting and upgrading organic resource materials in aqueous environments |
Aug. 16, 1994 |
| 5332489 |
Hydroconversion process for a carbonaceous material |
Jul. 26, 1994 |
| 5277796 |
Pretreating oil shale with organic acid to increase retorting yield and process efficiency |
Jan. 11, 1994 |
| 5266189 |
Integrated low severity alcohol-base coal liquefaction process |
Nov. 30, 1993 |
| 5228982 |
Liquefaction of decarboxylated carbonaceous solids |
Jul. 20, 1993 |
| 5071540 |
Coal hydroconversion process comprising solvent extraction and combined hydroconversion and upgrading |
Dec. 10, 1991 |
| 5026475 |
Coal hydroconversion process comprising solvent extraction (OP-3472) |
Jun. 25, 1991 |
| 5015366 |
Process and apparatus for coal hydrogenation |
May. 14, 1991 |
| 5013428 |
Recovery of oil from a shale containing the same |
May. 7, 1991 |
| 4983278 |
Pyrolysis methods with product oil recycling |
Jan. 8, 1991 |
| 4944866 |
Process for the hydrogenation of coal |
Jul. 31, 1990 |
| 4917791 |
Process and catalysts for hydroconversion of coal or petroleum asphaltene to distillate liquids |
Apr. 17, 1990 |
| 4909928 |
Coating of solid carbonaceous material with hydrocarbon liquid in process utilizing water containing system for receiving such carbonaceous material therethrough |
Mar. 20, 1990 |
| 4879021 |
Hydrogenation of coal and subsequent liquefaction of hydrogenated undissolved coal |
Nov. 7, 1989 |
| 4846963 |
Ionic liquefaction process |
Jul. 11, 1989 |
| 4842692 |
Chemical reformer |
Jun. 27, 1989 |
| 4764270 |
Simultaneous upgrading of tar sand bitumen and coal by corefining |
Aug. 16, 1988 |
| 4740294 |
Method for sequentially co-processing heavy hydrocarbon and carbonaceous materials |
Apr. 26, 1988 |
| 4698149 |
Enhanced recovery of hydrocarbonaceous fluids oil shale |
Oct. 6, 1987 |
| 4689139 |
Process for the hydrogenation of coal |
Aug. 25, 1987 |
| 4675102 |
Process for producing a diesel fuel from medium heavy oil obtained from coal |
Jun. 23, 1987 |
| 4664788 |
Multi-stage coal liquefaction and fractionation method |
May. 12, 1987 |
| 4629554 |
Coal liquefaction with coal tar solvent |
Dec. 16, 1986 |
| 4627913 |
Catalytic coal liquefaction with treated solvent and SRC recycle |
Dec. 9, 1986 |
| 4617105 |
Coal liquefaction process using pretreatment with a binary solvent mixture |
Oct. 14, 1986 |
| 4587005 |
Process for beneficiating Rundle oil-shale |
May. 6, 1986 |
| 4545890 |
Coal liquefaction and hydrogenation |
Oct. 8, 1985 |
| 4544476 |
Coal liquefaction and hydrogenation |
Oct. 1, 1985 |
| 4541913 |
Process for hydrocracking supercritical gas extracts of carbonaceous material |
Sep. 17, 1985 |
| 4539093 |
Extraction process and apparatus for hydrocarbon containing ores |
Sep. 3, 1985 |
| 4536278 |
Shale oil stabilization with a hydrogen donor quench |
Aug. 20, 1985 |
| 4533460 |
Oil shale extraction process |
Aug. 6, 1985 |
| 4521291 |
Coal extraction |
Jun. 4, 1985 |
| 4518480 |
Process for the efficient utilization of solvent modified oil shales |
May. 21, 1985 |
| 4510038 |
Coal liquefaction using vacuum distillation and an external residuum feed |
Apr. 9, 1985 |
| 4495057 |
Combination thermal and solvent extraction oil recovery process and apparatus |
Jan. 22, 1985 |
| 4491513 |
Process for beneficiating oil-shale |
Jan. 1, 1985 |
| 4490213 |
Coal conversion processes |
Dec. 25, 1984 |
| 4475924 |
Coal derived fuel composition and method of manufacture |
Oct. 9, 1984 |
| 4470900 |
Solids precipitation and polymerization of asphaltenes in coal-derived liquids |
Sep. 11, 1984 |
| 4460452 |
Process for separating crude oil from mixtures comprising finely divided inorganic solids, crude oil, and water |
Jul. 17, 1984 |
| 4455215 |
Process for the geoconversion of coal into oil |
Jun. 19, 1984 |
| 4455217 |
Retorting process |
Jun. 19, 1984 |
| 4451351 |
Method of liquefaction of carbonaceous materials |
May. 29, 1984 |
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