| Patents for C10G 21 - Refining of hydrocarbon oils, in the absence of hydrogen, by extraction with selective solvents (2,651) |
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| 11/14/1978 | US4125458 Simultaneous deasphalting-extraction process |
| 11/07/1978 | US4124492 Process for the reclamation of waste hydrocarbon oils |
| 09/12/1978 | US4113607 Extraction with ferric chloride |
| 08/29/1978 | US4110398 Metal separation from dragstream material of refining process |
| 08/22/1978 | US4108681 Method for dissolving asphaltic material |
| 08/15/1978 | CA1036525A1 Recovery and handling of asphalt containing a high concentration of asphaltene |
| 07/18/1978 | US4101415 Solvent deasphalting |
| 06/13/1978 | US4094770 Process for removing unfilterable solids from an oil |
| 05/09/1978 | US4088540 Solvent deasphalting apparatus |
| 05/02/1978 | US4087355 Solvent extraction of aromatic hydrocarbons |
| 04/25/1978 | US4086159 Solvent extraction of aromatic hydrocarbons with ethylene oxide polyol adducts |
| 04/11/1978 | US4083772 Aromatic hydrocarbon separation process |
| 03/28/1978 | US4081369 Liquid membranes, precipitation |
| 03/28/1978 | US4081355 Solvent extraction |
| 03/28/1978 | US4081354 Liquid-liquid extraction process |
| 03/28/1978 | US4081332 Extractive distillation of C5 hydrocarbons using acetonitrile and additives |
| 02/14/1978 | US4073720 Method for reclaiming waste lubricating oils |
| 01/17/1978 | US4069141 Process for recovering fuel oil from topped crude |
| 11/15/1977 | US4058454 Aromatic hydrocarbon separation via solvent extraction |
| 11/08/1977 | US4057491 Solvent recovery process for N-methyl-2-pyrrolidone in hydrocarbon extraction |
| 10/25/1977 | US4055480 Multi-phase separation methods and apparatus |
| 10/18/1977 | US4054512 Deasphalting with liquid hydrogen sulfide |
| 10/11/1977 | US4053744 Means for controlling a solvent refining unit |
| 10/11/1977 | US4053369 Extractive distillation |
| 09/13/1977 | US4048062 Aromatic extraction with solvent recovery and regeneration |
| 09/06/1977 | US4046676 Aromatic hydrocarbon separation via solvent extraction |
| 09/06/1977 | US4046675 Aromatic hydrocarbon separation via solvent extraction |
| 08/30/1977 | US4045332 Solvent extraction |
| 08/09/1977 | US4040958 Process for separating solids from high-boiling hydrocarbons in a plurality of separation stages |
| 08/02/1977 | US4039432 Upgrading metal-contaminated petroleum oils containing vanadium and/or nickel |
| 08/02/1977 | US4039389 Liquid-liquid extraction apparatus |
| 07/12/1977 | US4035287 Desulfurization of residual oil |
| 07/05/1977 | US4033784 Method for dissolving asphaltic material |
| 05/03/1977 | US4021335 Method for upgrading black oils |
| 04/19/1977 | US4018666 Process for producing low pour point transformer oils from paraffinic crudes |
| 04/12/1977 | US4017383 Evaporation |
| 03/22/1977 | US4013549 Phenolwater mixturesn-methyl-2-pyrrolidone |
| 01/04/1977 | US4001107 Solvent extraction, separation of benzene, toluene, xylene |
| 12/21/1976 | US3998726 Hydrocarbon deasphalting process and solvent extractor therefor |
| 10/12/1976 | US3985644 Methanol mixtures as solvents for aromatics extraction |
| 09/21/1976 | US3981798 Liquid extraction using certain ethers and estersmono-ethyl or mono-methyl ether of glycerine, glycerine mono- or di-acetate |
| 09/21/1976 | US3981797 Control of hydrocarbon deasphalting process |
| 08/31/1976 | US3977964 Stabilization of hydrocracked lube oils |
| 08/17/1976 | US3975396 Deasphalting process |
| 08/10/1976 | US3974073 Coal liquefaction |
| 08/03/1976 | US3972807 Hydrocarbon deasphalting via solvent extraction |
| 08/03/1976 | US3972692 Process for removing acid from hydrocarbons |
| 07/13/1976 | US3969196 Process for the separation of mixtures of substances |
| 06/29/1976 | US3966589 Process for the separation of aromatic hydrocarbons from a mixed hydrocarbon feedstock |
| 05/18/1976 | US3957628 Removal of organic sulfur compounds from hydrocarbon feedstocks |
| 04/27/1976 | US3953324 Removal of solvent |