| Patents for C10G 21 - Refining of hydrocarbon oils, in the absence of hydrogen, by extraction with selective solvents (2,651) |
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| 09/13/1994 | US5346615 Precipitation with organic carbonate |
| 09/06/1994 | US5344555 Sweetening oils and desulfurization |
| 08/31/1994 | EP0612829A1 Process for deasphalting and demetallizing petroleum residues |
| 08/25/1994 | CA2115488A1 Process for deasphalting and demetallizing petroleum residues |
| 08/09/1994 | US5336840 Solvent extraction, heat exchanging, cooling |
| 08/04/1994 | WO1994017155A1 Treatment of waste petroleum |
| 08/04/1994 | CA2154155A1 Treatment of waste petroleum |
| 07/26/1994 | US5332842 Process for inhibiting oxidation and polymerization of furfural and its derivatives |
| 07/12/1994 | US5328596 Lubricating oil refining process |
| 07/05/1994 | US5326456 Upgrading of bitumen asphaltenes by hot water treatment containing carbonate (C-2726) |
| 06/29/1994 | EP0603400A1 Method of removing halogenated aromatic compound from hydrocarbon oil |
| 06/29/1994 | CN1088606A Denitrifying method for liquid petroleum products |
| 06/29/1994 | CN1025183C Method of separating and purification for tar-derived anthracene |
| 06/22/1994 | EP0591218A4 Non-carcinogenic bright stock extracts and deasphalted oils and process for the production thereof |
| 06/07/1994 | CA1330063C De-asphalting process of a heavy hydrocarbon stock |
| 05/31/1994 | US5316659 From tar sands, superheated |
| 05/25/1994 | EP0597970A1 Process for removing impurities from petroleum products |
| 05/10/1994 | CA1329374C Methods for deactivating copper in hydrocarbon fluids |
| 05/03/1994 | US5308470 Non-carcinogenic asphalts and asphalt blending stocks |
| 04/13/1994 | EP0591218A1 Non-carcinogenic bright stock extracts and deasphalted oils and process for the production thereof |
| 04/12/1994 | CA1328420C Process for deasphalting heavy hydrocarbons |
| 04/06/1994 | EP0590673A1 Process for producing low viscosity lubricating base oil having high viscosity index |
| 04/06/1994 | EP0590672A1 Process for producing low viscosity lubricating base oil having high viscosity index |
| 03/09/1994 | CN1083513A Method for separating petroleum heavy oil |
| 03/08/1994 | US5292993 Process for removing impurities from petroleum products |
| 03/08/1994 | CA1327539C Removal of volatile acids from nmp solvent vapors with sacrificial metal and ion exchange |
| 02/22/1994 | US5288391 Deoiling, solvent extraction, separation; biodegradable solids; fuels |
| 02/15/1994 | US5286386 Solvent extraction process for treatment of oily substrates |
| 02/03/1994 | WO1994002209A1 Process and device for cleaning pcb-contaminated electric appliances |
| 02/01/1994 | US5282959 Method for the extraction of iron from liquid hydrocarbons |
| 01/11/1994 | CA1325992C Method of removing mercury from hydrocarbon oils |
| 12/29/1993 | EP0576346A1 Method of dehydrating solvant from hydrocarbons dewaxing (operation) process |
| 12/23/1993 | WO1993025635A1 Method of removing halogenated aromatic compound from hydrocarbon oil |
| 12/23/1993 | CA2114840A1 Method of removing halogenated aromatic compound from hydrocarbon oil |
| 12/21/1993 | US5271863 Compositions for extracting iron species from liquid hydrocarbon systems |
| 12/15/1993 | CN1079497A Method for removal of halogenated aromatic compound from hydrocarbon oil |
| 12/14/1993 | US5269968 Compositions for removing polychlorinated biphenyls from a contaminated surface |
| 11/25/1993 | WO1993023131A1 Recovering a relatively volatile component of a solution from a less volatile component, e.g. as in solvent recovery |
| 11/25/1993 | CA2135284A1 Recovering a relatively volatile component of a solution from a less volatile component, e.g. as in solvent recovery |
| 11/24/1993 | CN1022844C New technology for manufacturing high-value product by use of wax oil |
| 10/20/1993 | EP0566224A2 Improved amorphous adsorbent-based refining methods |
| 10/20/1993 | EP0460015B1 Solvent extraction process |
| 10/14/1993 | CA2092145A1 Amorphous adsorbent-based refining methods |
| 10/13/1993 | EP0565324A1 Method of recovering organic sulfur compound from liquid oil |
| 09/29/1993 | EP0562815A1 Aromatic hydrocarbons separation from aromatic/non-aromatic mixtures |
| 09/29/1993 | CN1022254C Process for conversion of heavy hydrocar-bonaccous feedstock |
| 09/28/1993 | CA2090148A1 Organic non-quaternary clathrate salts for petroleum separation |
| 09/22/1993 | CN1076473A Removing metal impurities from hydrocarbon materials by inorganic phosphorated chelating agent |
| 09/17/1993 | CA2087299A1 Method for the extraction of iron from liquid hydrocarbons |
| 09/07/1993 | US5242579 Control method for solvent refining lubricating oils |
| 08/10/1993 | US5234597 Selective extraction of aromatic hydrocarbons from a mixture with non-aromatic hydrocarbons |
| 08/10/1993 | US5234504 Methods for removing contaminants from contaminated solids (II) |
| 08/03/1993 | US5232577 Hydrocracking process with polycyclic aromatic dimer removal |
| 07/20/1993 | CA1320467C Process for the thermal cracking of residual hydrocarbon oils |
| 06/29/1993 | US5223175 Dispersed aqueous solution of glyoxal and acetic acid or sodium acetate buffer, saturated liquid hydrocarbon, emulsifier |
| 06/29/1993 | US5223122 Producing method of fractionated wax products having different molecular weights from solid wax |
| 06/15/1993 | US5220106 Organic non-quaternary clathrate salts for petroleum separation |
| 06/09/1993 | CN1021114C Phosphoric acid/active carbon catalyst and coincidence process |
| 06/02/1993 | EP0543933A1 Hydrocracking process with polycyclic aromatic dimer removal |
| 05/19/1993 | CN1020745C Process for recovering solvent during hydrocarbon processing |
| 05/18/1993 | CA1317891C Process for separating a fluid feed mixture containing hydrocarbon oil and a organic solvent |
| 05/18/1993 | CA1317890C Process for separating a fluid mixture containing hydrocarbons and an organic solvent |
| 05/12/1993 | CN1020626C Process for thermal cracking of residual hydrocarbon oils |
| 04/28/1993 | EP0538819A2 Treatment of oils using epoxylated tertiary amines |
| 04/28/1993 | EP0538738A2 Desulfurization and Decolourizing of light oil by extraction |
| 04/13/1993 | US5202520 Method for aromatic hydrocarbon recovery |
| 03/09/1993 | US5192421 Vacuum distillation for deasphalting |
| 03/02/1993 | US5191152 Process for the separation of aromatic hydrocarbons with energy redistribution |
| 02/23/1993 | US5188709 Crude oil processing apparatus for heavy oil extraction |
| 02/18/1993 | WO1993003115A1 Process for removing impurities from petroleum products |
| 01/26/1993 | US5181557 Apparatus for separating a resin phase from a solvent solution containing a solvent, demetallized oil and a resin |
| 01/12/1993 | US5178747 Free of polynuclear aromatic compounds; vacuum distillation; solvent extraction |
| 01/12/1993 | CA1312571C Energy efficient aromatic extraction process |
| 01/07/1993 | WO1993000414A1 Non-carcinogenic bright stock extracts and deasphalted oils and process for the production thereof |
| 12/23/1992 | CN1019584B Solvent extraction process |
| 12/22/1992 | US5172760 Heat exchange apparatus for separating a resin phase from a solvent solution containing a solvent, demetallized oil and a resin |
| 12/15/1992 | US5171426 Control method for solvent refining lubricating oils |
| 12/15/1992 | CA1311401C Process and apparatus for removing pcb's from electrical apparatus |
| 11/11/1992 | EP0512165A1 Method of operating an unsaturated gas plant |
| 10/13/1992 | US5154831 Solvent extraction process employing comminuting and dispersing surfactants |
| 10/06/1992 | US5152886 Method for improving heavy crude oils by reducing the asphaltene content of crude oils and oil-containing tar sands |
| 09/23/1992 | EP0504982A1 Continuous process for deasphalting and demetallating a residue from crude oil distillation |
| 09/23/1992 | CA2063101A1 Continuous process for deasphalting and demetallating a residue from crude oil distillation |
| 09/08/1992 | US5145574 Deasphalting |
| 08/18/1992 | US5139651 Aromatic extraction process using mixed polyalkylene glycol/glycol ether solvents |
| 08/18/1992 | US5139621 Azeotropic distillation process for recovery of diamondoid compounds from hydrocarbon streams |
| 08/05/1992 | EP0497024A1 Non-carcinogenic light lubricants and a process for producing same |
| 07/14/1992 | CA1304911C Sulfur removal from hydrocarbons |
| 07/09/1992 | DE4100345A1 Removal of suspended material from organic liq. (mixts.) - by adding fatty alcohol-polyglycol-ether] to e.g. diesel oil, mixing and sepg. solids using known techniques |
| 06/24/1992 | EP0491058A1 Vapor solvent decontamination of PCB transformer components |
| 06/17/1992 | DE4041097C1 Prodn. of paraffin oils - comprises extracting solvent raffinate with super-critical gases using carbon di:oxide, propane and butane |
| 06/16/1992 | US5122194 Methods and compositions for removing polychlorinated biphenyls from a contaminated surface |
| 06/10/1992 | EP0489371A1 Hydrocarbon mixtures with high monocyclic and bicyclic aromatics content |
| 06/10/1992 | CN1016965B Process for deasphalt of hydrocarbon charge consisting of asphaltene |
| 06/09/1992 | US5120900 Integrated solvent extraction/membrane extraction with retentate recycle for improved raffinate yield |
| 06/06/1992 | WO1992010448A1 Integrated solvent extraction/membrane extraction with retentate recycle for improved raffinate yield |
| 06/06/1992 | CA2096656A1 Integrated solvent extraction/membrane extraction with retentate recycle for improved raffinate yield |
| 06/03/1992 | EP0321469B1 Reclassification of electrical apparatus contaminated with pcb |
| 05/13/1992 | EP0485077A1 Solvent extraction process involving membrane separation of extract phase and/or intermediate zone phase with pseudo extract/pseudo raffinate recycle |
| 05/06/1992 | CA2054046A1 Solvent extraction process involving membrane separation of extract phase and/or intermediate zone phase with pseudo extract/pseudo raffinate recycle |