| Patents for C10G 21 - Refining of hydrocarbon oils, in the absence of hydrogen, by extraction with selective solvents (2,651) |
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| 12/15/1981 | US4305813 Method of extractive purification of residues from crude oil refining and heavy ends thereof |
| 12/15/1981 | US4305812 Solvent deasphalting by polarity gradient extraction |
| 12/08/1981 | US4304660 Treating secondary raffinates with sulfuric acid |
| 12/01/1981 | US4303497 Desulfurization, demetalation and denitrogenation of coal |
| 12/01/1981 | CA1113419A1 Process for removing unfilterable solids from an oil |
| 11/24/1981 | US4302325 Solvent extraction process for rerefining used lubricating oil |
| 11/03/1981 | US4298456 Oil purification by deasphalting and magneto-filtration |
| 10/27/1981 | US4297206 Hydrotreatment of the extract prior to circulation to the extractor; jet fuels |
| 10/13/1981 | US4294695 Multi-phase separation methods and apparatus |
| 10/13/1981 | US4294689 Solvent refining process |
| 09/29/1981 | CA1109817A1 Process for regenerating exhausted oils |
| 09/22/1981 | US4290880 Supercritical process for producing deasphalted demetallized and deresined oils |
| 09/22/1981 | CA1109415A1 Acetonitrile extractive distillation solvent for c-5 hydrocarbons |
| 09/15/1981 | CA1109014A1 Solvent recovery process for processing of hydrocarbons |
| 09/03/1981 | WO1981002422A1 Multidentate macromolecular complex salt clathrates |
| 08/12/1981 | EP0033512A2 Separation of aromatic hydrocarbons from petroleum fractions |
| 07/21/1981 | US4279739 Process for separating bituminous materials |
| 07/14/1981 | US4278529 Process for separating bituminous materials with solvent recovery |
| 07/14/1981 | US4278505 Process of recovering an n-hexane product which is free from aromatic compounds |
| 06/23/1981 | US4274934 Process for removing nitrogen from shale oil using pyrrole polymerization |
| 06/16/1981 | US4273645 Solvent extraction production of lube oil fractions |
| 06/16/1981 | US4273644 Pressure reduction and steam stripping |
| 06/09/1981 | US4272361 Method for reducing the nitrogen content of shale oil |
| 06/02/1981 | US4271009 Method for reducing the nitrogen content of shale oil |
| 05/12/1981 | CA1100898A1 Process for separating tar and solids from coal liquefaction products using a halogenated aliphatic solvent |
| 04/28/1981 | CA1100080A1 Solvent deasphalting apparatus and process |
| 04/07/1981 | US4260476 Separation of aromatic hydrocarbons from petroleum fractions |
| 03/25/1981 | EP0025765A1 Process for the separation with the aid of sulfon amides of dienic and/or aromatic hydrocarbons from hydrocarbon mixtures containing them |
| 03/25/1981 | EP0025764A1 Process for the preparation of aliphatic sulfonamides |
| 03/17/1981 | US4256567 Pretreatment with sulfonating agents |
| 03/10/1981 | CA1097255A1 Solvent recovery process for n-methyl-2-pyrrolidone in hydrocarbon extraction |
| 03/03/1981 | CA1096801A1 Deasphalting with liquid hydrogen sulfide |
| 01/27/1981 | CA1094497A1 Aromatic extraction with solvent recovery and regeneration |
| 01/07/1981 | EP0021479A1 Process and plant for the removal of acidic components |
| 12/23/1980 | US4240901 Recycling an inert gas through the contact zone of the extraction tower |
| 12/16/1980 | US4239617 Process and apparatus for solvent extraction of oil from oil-containing diatomite ore |
| 12/16/1980 | US4239616 Removing entrained resinous bodies from extracted oil |
| 12/16/1980 | CA1091615A1 Use of n-methyl-morpholine-3-one in the extractive distillation of hydrocarbons |
| 12/16/1980 | CA1091607A1 Method for reclaiming waste lubricating oils |
| 12/10/1980 | EP0020094A1 An improved solvent extraction process for providing lubricating oil fractions |
| 11/25/1980 | US4236030 By extraction with an aqueous formaldehyde solution |
| 11/11/1980 | US4233140 Recycling and solvent extraction |
| 11/04/1980 | US4231459 Control system for an N-methyl-2-pyrrolidone refining unit receiving light sweet charge oil |
| 10/28/1980 | US4230215 Control system for an MP refining unit receiving medium sweet charge oil |
| 10/28/1980 | US4230184 Sulfur extraction method |
| 10/14/1980 | US4228002 Precipitation of asphaltenes and settling of mineral matter |
| 09/23/1980 | US4224674 Control system for an N-methyl-2-pyrrolidone refining unit receiving heavy sweet charge oil |
| 09/23/1980 | US4224673 Control system for an MP refining unit receiving heavy sour charge oil |
| 09/09/1980 | CA1085335A1 Thermal stabilization of n-methyl-2-pyrrolidone |
| 09/09/1980 | CA1085334A1 Simultaneous deasphalting-extraction process |
| 07/29/1980 | US4214975 Solvent recovery process for processing of hydrocarbons |
| 07/15/1980 | CA1081643A1 Process for producing low pour point transformer oils from paraffinic crudes |
| 07/08/1980 | US4212070 Control system for a furfural refining unit receiving heavy sweet charge oil |
| 07/08/1980 | US4211633 Separation of asphaltic materials from heptane soluble components in liquified solid hydrocarbonaceous extracts |
| 06/24/1980 | US4209385 Method for reducing the nitrogen content of shale oil with a selective solvent comprising an organic acid and a mineral acid |
| 06/17/1980 | US4208263 Subjecting to voltage gradients |
| 06/17/1980 | CA1079666A1 Simultaneous production of lube oil and low pour products |
| 06/10/1980 | US4207174 Liquid-liquid extraction apparatus and process |
| 06/10/1980 | US4207168 Deasphalting by gravity settling |
| 05/06/1980 | US4201660 Process for the separation of mixtures of various hydrocarbon compounds |
| 05/06/1980 | US4201658 Separation using deasphalting solvent |
| 05/06/1980 | US4201626 Liquid-liquid contacting apparatus |
| 04/15/1980 | CA1075630A1 Use of water/methanol mixtures as solvents for aromatics extraction |
| 03/05/1980 | EP0008449A1 Process for removing COS from a gas or liquid stream |
| 03/04/1980 | US4191639 Hydrogen sulfide, carbon dioxide, hydrocarbon solvents |
| 02/05/1980 | CA1071132A1 Process for the reclamation of waste hydrocarbon oils |
| 01/08/1980 | CA1069454A1 Solvent deasphalting process by solvent recovery at staged pressures |
| 12/25/1979 | USRE30179 Common ion effect to assist LM separation |
| 12/25/1979 | US4180456 Process for recovering a premium oil from a slurry produced by high temperature hydrogenation of a solid, hydrocarbonaceous fuel |
| 12/18/1979 | US4179362 Process for aromatics extraction from a 300°-430° F. boiling range naphtha |
| 12/04/1979 | US4177137 Heat exchange for stripping |
| 11/20/1979 | US4175034 Closed-loop vacuum fractionation process |
| 10/23/1979 | USRE30125 Liquid membrane process for the separation of aqueous mixtures |
| 10/23/1979 | US4172014 Control system for a furfural refining unit receiving medium sour charge oil |
| 10/09/1979 | US4170547 Process for the separation of dienic or aromatic hydrocarbons from hydrocarbon fractions containing them with the aid of sulfonamides |
| 10/09/1979 | US4170544 Hydrocracking process including upgrading of bottoms fraction of the product |
| 10/02/1979 | US4169781 Denitrification by furfural-ferric chloride extraction of coker oil |
| 10/02/1979 | US4169766 Control system for an N-methyl-2-pyrrolidone refining unit receiving light sour charge oil |
| 10/02/1979 | CA1063614A1 Solvent extraction |
| 09/25/1979 | US4169016 Control system for a furfural refining unit receiving light sweet charge oil |
| 09/18/1979 | US4168226 Addition of water prior to heating |
| 09/18/1979 | CA1062644A1 Separation process |
| 09/11/1979 | US4167452 Control system for an N-methyl-2-pyrrolidone refining unit receiving medium sour charge oil |
| 09/11/1979 | US4167451 N-Methyl-2-pyrrolidone refining unit control system |
| 09/11/1979 | CA1062190A1 Process and equipment for the de-asphalting of residues from vacuum distillation of petroleum, and application to the reclaiming of lubricant oils |
| 08/21/1979 | US4165259 Control system for a furfural refining unit receiving heavy sour charge oil |
| 08/14/1979 | US4164450 Control system for a furfural refining unit receiving light sour charge oil |
| 08/14/1979 | CA1060369A1 Coal liquefaction |
| 07/24/1979 | US4162197 Analyzers, flow rate control |
| 07/17/1979 | US4161427 Control system for a furfural refining unit receiving medium sweet charge oil |
| 06/05/1979 | CA1055876A1 Process for the separation of aromatic hydrocarbons from a mixed hydrocarbon feedstock |
| 05/22/1979 | US4155833 Separation of true asphaltenes from microcrystalline waxes |
| 05/22/1979 | CA1054961A1 Process of separating solids from dust-containing high-boiling hydrocarbons |
| 05/02/1979 | EP0001676A2 A process for separating tar and solids from coal liquefaction products |
| 05/02/1979 | EP0001675A2 Process for increasing fuel yield of coal liquefaction |
| 05/01/1979 | CA1053601A1 Extractive distillation |
| 04/18/1979 | EP0001457A1 Process for the recovery of n-hexane free of benzene |
| 04/10/1979 | US4148716 Process for separating tar and solids from coal liquefaction products using a halogenated aliphatic solvent |
| 03/20/1979 | US4145277 Denitrification by furfural-ferric chloride extraction of a hydrodesulfurized hydrocarbonaceous oil |
| 01/09/1979 | US4133740 Process for increasing the fuel yield of coal liquefaction products by extraction of asphaltenes, resins and aromatic compounds from said coal liquefaction products |