| Patents for C10G 21 - Refining of hydrocarbon oils, in the absence of hydrogen, by extraction with selective solvents (2,651) |
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| 06/27/1990 | CN1043309A Method for isolation and purification of coal tar-derived anthracene |
| 06/14/1990 | WO1990006350A1 Process for the extraction of a hydrocarbonaceous filler by using an organic solvent |
| 06/13/1990 | EP0372652A1 Process for the conversion of a heavy hydrocarbonaceous feedstock |
| 06/13/1990 | EP0371980A1 Devices for bursting and decontamination, in particular of electric transformers and their oils |
| 06/06/1990 | CN1042730A New technology for manufacturing high-value product by use of wax oil |
| 06/05/1990 | CA2004480A1 Process for the conversion of a heavy hydrocarbonaceous feedstock |
| 05/25/1990 | CA2003833A1 Organic solvent hydrocarbon extraction procedure |
| 05/23/1990 | CN1008066B Process for sulfur removal from hydrocarbons |
| 04/24/1990 | US4919816 Using ion exchange resins to reduce corrosion |
| 04/11/1990 | EP0362446A1 Aromatic extraction process |
| 04/10/1990 | US4915819 Treatment of viscous crude oils |
| 04/10/1990 | US4915818 Forming water insoluble mercuric sulfide; phase separation; pollution control |
| 04/03/1990 | US4913178 Process and apparatus for removing PCB's from electrical apparatus |
| 03/21/1990 | CN1007239B Decalcification of hydrocarbonaceous feedstocks using sequestering agents |
| 03/20/1990 | US4909927 Mixture of N-methylpyrrolidone and additive selected from aliphatic aromatics, polar naphthalenes and(or) morpholine |
| 03/07/1990 | CN1040214A Decalcification of hydrocarbonaceous feedstocks using sequestering agents |
| 01/30/1990 | US4897182 Aromatic extraction process having improved water stripper |
| 01/30/1990 | CA1265086A1 Removal of polychlorinated biphenyls by solvent extraction |
| 01/09/1990 | US4892644 Upgrading solvent extracts by double decantation and use of pseudo extract as hydrogen donor |
| 12/27/1989 | EP0347411A1 Method for decontaminating transformers with pcb |
| 12/19/1989 | US4888108 Separation of fine solids from petroleum oils and the like |
| 12/05/1989 | CA1263625A1 Solvent refining of residues |
| 11/21/1989 | US4882035 Deasphalting, solvent extraction, shearing |
| 11/07/1989 | US4879004 Process for the extraction of oil or polychlorinated biphenyl from electrical parts through the use of solvents and for distillation of the solvents |
| 11/07/1989 | CA1262606A1 Method for replacing pcb-containing coolants in electrical induction apparatus with substantially pcb-free dielectric coolants |
| 11/01/1989 | CN1036787A Process for thermal cracking of residual hydrocarbon oils |
| 10/17/1989 | CA1262366A1 Extraction of aromatics with ethyl acetoacetate |
| 10/17/1989 | CA1262365A1 Extraction of aromatics with n-cyclohexyl-2- pyrrolidone |
| 09/26/1989 | US4869809 Aromatics extraction process control |
| 09/19/1989 | CA1259461A1 Method for replacing pcb-containing coolants in electrical induction apparatus with substantially pcb-free dielectric coolants |
| 09/12/1989 | US4866632 Control means and method for solvent refining unit |
| 08/29/1989 | US4861447 Process for reducing corrosive impurities in sulfolane used for extracting aromatic hydrocarbons |
| 08/23/1989 | EP0329510A1 Process for deasphaltizing a heavy hydrocarbon feedstock, and applications of this process |
| 08/16/1989 | EP0328216A1 Process for the thermal cracking of residual hydrocarbon oils |
| 07/26/1989 | EP0325486A2 Method of removing mercury from hydrocarbon oils |
| 07/11/1989 | US4846957 Precipitation of asphaltene |
| 07/11/1989 | CA1257214A1 Process for solid separation from hydroprocessing liquid product |
| 06/28/1989 | EP0321469A1 Reclassification of electrical apparatus contaminated with pcb. |
| 06/27/1989 | US4843184 Process for extracting paraffins from their mixtures with paraffinsulfonic acids |
| 06/21/1989 | EP0320813A1 Process for the continuous extraction of high or non-boiling but melting organic mixtures |
| 06/06/1989 | US4837338 Removal of impurities from n-methyl-pyrrolidone using highly pure water washed activated alumina |
| 05/16/1989 | US4831160 Solvent extraction, steam stripping |
| 05/16/1989 | US4830711 Installation for separating a solvent from a mixture of solvent and hydrocarbons |
| 05/09/1989 | US4828703 Draining, filling with interim dielectric, operating, draining |
| 05/09/1989 | CA1253825A1 Treatment of viscous crude oils |
| 05/02/1989 | US4827078 Process for extracting paraffins from their mixtures with alkanesulfonic acids |
| 05/02/1989 | US4827050 Carbon dioxide extraction agent, hydrocarbon entrainer |
| 05/02/1989 | US4826538 Immersing in solvent, heating, subjecting to ultrasonic waves |
| 04/25/1989 | CA1253103A1 Method for improving the stability of shale oil |
| 04/11/1989 | US4820400 Introducing free charge before filtration with undewaxed oil |
| 03/28/1989 | US4816140 Process for deasphalting a hydrocarbon oil |
| 03/21/1989 | US4814021 Apparatus and method for reclassifying electrical apparatus contaminated with PCB |
| 03/07/1989 | US4810367 Heavy solvent and light solvent, precipitation |
| 03/07/1989 | US4810366 Process for separating a fluid feed mixture containing hydrocarbon oil and an organic solvent |
| 02/28/1989 | US4808765 Carbonyl sulfide; selective absorption and hydrolysis |
| 02/07/1989 | US4802975 Recovering volatile hydrocarbons through vertical packed column with steam, gases |
| 01/31/1989 | CA1249543A1 Process for increasing deasphalted oil production |
| 01/19/1989 | DE3717820C1 Process for producing mineral oil cuts of lubricating oil quality by extraction with polar solvents |
| 01/12/1989 | WO1989000332A1 Devices for bursting and decontamination, in particular of electric transformers and their oils |
| 01/10/1989 | US4797200 Upgrading heavy oils by solvent dissolution and ultrafiltration |
| 01/03/1989 | US4795551 Solvent refining of residues |
| 12/13/1988 | US4790337 Apparatus for removing PCB's from electrical apparatus |
| 12/13/1988 | CA1246483A1 Separation of aromatic and nonaromatic components in mixed hydrocarbon feeds |
| 12/13/1988 | CA1246482A1 Method to process heavy crude oils |
| 12/06/1988 | US4789463 Aqueous solution extraction and separation from petroleum crudes |
| 12/01/1988 | WO1988009225A1 Method for decontaminating transformers with pcb |
| 11/24/1988 | DE3715235A1 Process and device for extracting oil or polychlorinated biphenyl from impregnated electrical components by means of a solvent, and for distillation of the solvent |
| 11/17/1988 | EP0290656A1 Process for the separation of hydrocarbons from a mixed feedstock |
| 11/15/1988 | US4784753 Supercritical temperature and pressure, heat exchanging |
| 11/10/1988 | DE3714312A1 Process and device for cleaning electrical devices with an insulating oil in a vessel |
| 11/09/1988 | EP0290098A1 Process and apparatus for extracting oil or polychlorinated biphenyls from impregnated electrical components by means of a solvating agent, and distillation of the solvent |
| 11/01/1988 | US4781820 Aromatic extraction process using mixed polyalkylene glycols/glycol ether solvents |
| 11/01/1988 | US4781819 Water in oil emulsion, deasphalting |
| 11/01/1988 | CA1243979A1 Process for increasing deasphalted oil production from upgraded oil residua |
| 10/18/1988 | US4778945 Process for removing paraffins from their mixtures with paraffinsulphonic acids |
| 10/18/1988 | US4778592 Demetalation of hydrocarbonaceous feedstocks using amino-carboxylic acids and salts thereof |
| 10/18/1988 | US4778591 Demetalation of hydrocarbonaceous feedstocks using carbonic acid and salts thereof |
| 10/18/1988 | US4778590 Decalcification of hydrocarbonaceous feedstocks using amino-carboxylic acids and salts thereof |
| 10/18/1988 | US4778589 Demetallization of petroleum crudes, shale oil, liquified coal, tar sand effluent and similar oils and residues |
| 10/11/1988 | US4776927 Extractive distillation using n-substituted morpholine |
| 08/16/1988 | US4764256 Countercurrent flow; distillation, recycling |
| 08/02/1988 | US4761222 Method for separating normally liquid organic compounds |
| 07/28/1988 | DE3740067A1 Cleaning method for an electrical insulating part |
| 07/19/1988 | CA1239371A1 De-asphalting heavy crude oil and heavy crude oil/water emulsions |
| 06/28/1988 | CA1238598A1 Process for the preparation of hydrocarbon mixtures from an oil residue |
| 06/21/1988 | US4752382 Reducing the metals content of petroleum feedstocks |
| 06/15/1988 | EP0270928A2 Cleaning method for an insulating part |
| 06/14/1988 | US4750990 Membrane separation of hydrocarbons using cycloparaffinic solvents |
| 06/07/1988 | US4749472 Heating, distillation, extraction with aqueous carboxylic acid |
| 05/31/1988 | US4748288 Process for the separation of solvents from hydrocarbons dissolved in the solvents |
| 05/31/1988 | US4747936 Deasphalting and demetallizing heavy oils |
| 05/24/1988 | US4746420 Process for upgrading diesel oils |
| 05/17/1988 | US4744905 Polysiloxane blends, transformers |
| 05/11/1988 | CN87105310A Process for extracting paraffins from their mixtures with alkanesulphonic acids |
| 05/10/1988 | US4743360 Process for removing basic nitrogen compounds from gas oils |
| 04/20/1988 | CN87105311A Process for extracting paraffins from their mixtures with paraffinsulphonic acids |
| 04/19/1988 | US4738780 Method for replacing PCB-containing coolants in electrical induction apparatus with substantially PCB-free dielectric coolants |
| 04/13/1988 | CN87107146A Combining technique of catalytic cracking and extraction of heavy oil aromatics |
| 04/06/1988 | EP0160668B1 Method for reducing content of halogenated aromatics in hydrocarbon solutions |
| 03/30/1988 | EP0261701A1 Process for removing paraffins from their mixtures with paraffinsulphonic acids |