| Patents for C10G 21 - Refining of hydrocarbon oils, in the absence of hydrogen, by extraction with selective solvents (2,651) |
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| 05/05/1992 | CA1300163C Removal of impurities from n-methyl-pyrrolidone used for lubricating oilextraction using activated alumina |
| 04/22/1992 | CN1016354B Decalcification of hydrocarbonaceous feedstock using extraction |
| 04/15/1992 | EP0480106A1 Process for isolating mesophase pitch |
| 04/08/1992 | EP0479258A1 Solvent extraction process for treatment of oily substrates |
| 04/03/1992 | CA2052497A1 Solvent extraction process for treatment of oily substrates |
| 04/01/1992 | CN1059928A Hydrocracking process with polycyclic aromatic dimer removal |
| 04/01/1992 | CN1059851A Process for recovering solvent during hydrocarbon processing |
| 03/24/1992 | US5098994 Heat exchanging, reversing the flow and recovering the solvent |
| 03/05/1992 | WO1992003520A1 Hydrocracking process with polycyclic aromatic dimer removal |
| 02/25/1992 | CA1296359C Process for extracting paraffins from their mixtures with alkanesulphonic acids |
| 02/25/1992 | CA1296358C Process for removing paraffins from their mixtures with paraffinsulphonic acids |
| 02/25/1992 | CA1296357C Process for extracting paraffins from their mixtures with paraffinsulphonic acids |
| 02/18/1992 | US5089114 Method for processing heavy crude oils |
| 02/09/1992 | WO1992002278A1 Removing polychlorinated biphenyls from a contaminated surface |
| 02/09/1992 | CA2067201A1 Removing polychlorinated biphenyls from a contaminated surface |
| 02/02/1992 | CA2045376A1 Methods of extracting iron species from liquid hydrocarbons |
| 01/21/1992 | US5082535 Apparatus for the extraction of oil or polychlorinated biphenyl from electrical parts through the use of solvents and for distillation of the solvents |
| 01/21/1992 | US5082012 Simplified apparatus for decontaminating electrical apparatus contaminated with PCBs |
| 01/07/1992 | US5078858 Methods of extracting iron species from liquid hydrocarbons |
| 12/31/1991 | US5076909 Analyzing for aromatics by ultraviolet radiation |
| 12/27/1991 | EP0462734A1 Azeotropic distillation process for recovery of diamondoid compounds from hydrocarbon streams |
| 12/27/1991 | EP0462529A1 Method and device for cleaning of contaminated substances and appliances |
| 12/18/1991 | EP0461694A1 Process for deasphalting and demetallizing crude petroleum or its fractions |
| 12/17/1991 | US5073669 Method for aromatic hydrocarbon recovery |
| 12/05/1991 | CA2043488A1 Process for deasphalting and demetallizing crude petroleum or its fractions |
| 10/01/1991 | US5053137 Passing through cation then amion exchange resins |
| 09/17/1991 | CA1289098C Extraction of hydrocarbon oils using a combination polar extraction solvent-aliphatic-aromatic or polar extraction solvent-polar substituted naphthenes extraction solvent mixtures |
| 09/03/1991 | CA1288377C Extraction process and apparatus |
| 08/20/1991 | US5041206 Solvent extraction of lubricating oils |
| 08/14/1991 | EP0441677A1 Process for stabilising catalytically cracked gasoils, obtained gasoils and compositions containing this stabilised gasoil |
| 08/13/1991 | US5039399 Solvent extraction of lubricating oils |
| 08/07/1991 | EP0439905A1 Separation of furfural/middle distillate streams |
| 07/30/1991 | CA1287007C Process for upgrading diesel oils |
| 07/24/1991 | EP0408700A4 Composition and method for sweetening hydrocarbons |
| 07/23/1991 | US5034119 Non-carcinogenic bright stock extracts and deasphalted oils |
| 07/23/1991 | CA1286612C Process for the separation of solvents from hydrocarbons dissolved in said solvents |
| 07/19/1991 | CA2025028A1 Separation of furfural/middle distillate streams |
| 07/16/1991 | US5032250 Solvent extraction |
| 06/22/1991 | CA2031858A1 Rendering oily wastes landtreatable or usable |
| 06/22/1991 | CA2031857A1 Process for deoiling wastes |
| 06/19/1991 | EP0432858A1 Process for removing hydrogen sulfide from crude petroleum |
| 06/11/1991 | US5022981 Extractive and steam distillation |
| 06/05/1991 | EP0430444A1 Solvent extraction of lubricating oils |
| 05/29/1991 | EP0429197A1 Solvent extraction of lubricating oils |
| 05/15/1991 | EP0427452A2 Process for separating a charge containing dewaxing solvent and dewaxed oil |
| 05/14/1991 | US5015364 Method and means for refinery gas plant operation |
| 05/09/1991 | CA2029030A1 Process for treating a charge containing dewaxing solvent and dewaxed oil |
| 04/30/1991 | US5011594 Process for the continuous extraction of mixtures of organic substances with supercritical solvents |
| 04/30/1991 | CA1283618C Two step heterocyclic nitrogen extraction from petroleum oils |
| 04/23/1991 | US5009772 Pressure reduction enhanced separation |
| 04/16/1991 | US5008004 Condensation, refluxing |
| 04/10/1991 | EP0420946A1 Process for the extraction of a hydrocarbonaceous filler by using an organic solvent |
| 04/03/1991 | CN1050400A Process for extracting petroleum from petroleum-containing soil |
| 04/02/1991 | CA1282364C Deasphalting process including energy recovery in the course of the separation of deasphalted oil and deasphalting solvent |
| 03/26/1991 | US5002655 Process for the recovery of aromatic nitrogen-containing compounds |
| 03/20/1991 | EP0417980A1 Process for the production of process oils with a low content of polycyclic aromatic compounds |
| 03/13/1991 | EP0416969A1 New water-in-oil emulsions and their use for removing hydrogen sulfide |
| 03/06/1991 | CA2024028A1 Water-in-oil emulsions and their use in the elimination of hydrogen sulphide |
| 03/05/1991 | CA1280990C Deasphalting process for a hydrocarbon feedstock containing asphaltene |
| 02/20/1991 | CN1049374A Withdrawing oil acid from crude oil |
| 02/20/1991 | CN1049373A Phosphoric acid/active carbon catalyst and coincidence process |
| 02/20/1991 | CN1049372A Coal distribution method using in coking |
| 02/19/1991 | US4994175 Syncrude dedusting extraction |
| 02/13/1991 | EP0412214A1 Purifying sulfolane |
| 02/12/1991 | US4992162 Solvent fraction separated from crude oil and combined with rerun solvent, distilled to give purified extraction solvent |
| 02/05/1991 | US4990238 Blends of tumorigenic and non-tumorigenic hydrocarbon oils |
| 01/29/1991 | US4988446 Quantitative analysis by chromatography of hydrocarbon oils, uv radiation |
| 01/23/1991 | EP0408700A1 Composition and method for sweetening hydrocarbons. |
| 01/15/1991 | US4985139 Two-step heterocyclic nitrogen extraction from petroleum oils with reduced refinery equipment |
| 01/15/1991 | US4985138 Process for treating a charge containing dewaxing solvent and dewaxed oil |
| 01/08/1991 | US4983222 Two-stage cleaning with degreasing agent; disassembly and recovering parts |
| 01/01/1991 | US4982051 Separation of furfural/middle distillate streams |
| 01/01/1991 | US4982049 Solvent extraction of diamondiods |
| 12/19/1990 | EP0403087A1 Conversion increase of vacuum residuums |
| 12/18/1990 | US4978512 Contacting sulfides with reaction product of alkalolamine and aldehyde |
| 12/12/1990 | CA2010774A1 Conversion increase of vacuum residiums |
| 12/05/1990 | EP0400989A2 Method for spectroscopic analysis of hydrocarbons, method for chromatographic analysis of hydrocarbons and hydrocarbon refining operation using these methods |
| 11/28/1990 | EP0399851A2 Purification of hydrocarbonaceous fractions |
| 11/28/1990 | CN1010583B Process for extracting paraffins from their mixtures with paraffinsulphonic acids |
| 11/26/1990 | CA2017527A1 Purification of hydrocarbonaceous fractions |
| 11/21/1990 | CN1010477B Process for extracting paraffins from mixture of alkane and alkanesutphonic acid |
| 11/06/1990 | CA1275960C Process for upgrading diesel oils including cetane improvement |
| 10/10/1990 | CN1009923B Process for removing paraffins from their mixture with paraffinsulphonic acid |
| 10/03/1990 | EP0389702A1 Method of removal of volatile acids from NMP solvent vapors with sacrificial metal and ion exchange |
| 10/02/1990 | US4960508 Two-step heterocyclic nitrogen extraction from petroleum oils |
| 10/02/1990 | US4960507 Two-step heterocyclic nitrogen extraction from petroleum oils |
| 09/07/1990 | WO1990010048A1 Solvent extraction process |
| 09/05/1990 | EP0385006A1 Removing haze from dewaxed hydrocarbon oil mixture boiling in the lubricating oil range |
| 09/05/1990 | CN1045119A Solvent extraction process |
| 08/28/1990 | US4952748 Solvent extraction of gas stream to remove diamondoid compounds |
| 08/28/1990 | US4952747 Distillation, solvent extraction, absorption, recycling, regeneration; controlling pressure and temperature |
| 08/21/1990 | CA1272976A1 Process for increasing bright stock oil raffinate production |
| 08/21/1990 | CA1272975A1 Separation of fine solids from petroleum oils and the like |
| 08/08/1990 | EP0380879A1 Removal of acidic impurities in processes for solvent extraction of aromatics from nonaromatics |
| 08/08/1990 | CN1044487A Prodn. of industrial light oil by solvent complex-extraction process |
| 08/07/1990 | US4946582 Copper and tin halide adsorbers |
| 07/31/1990 | CA2003344A1 Removal of acidic impurities in processes for solvent extraction of aromatics from nonaromatics |
| 07/25/1990 | CN1044116A Process for conversion of heavy hydrocarbonaccous feedstock |
| 07/12/1990 | WO1990007467A1 Composition and method for sweetening hydrocarbons |
| 07/03/1990 | US4938862 Synthesis gas direct heat exchange |