| Patents for C10G 53 - Treatment of hydrocarbon oils, in the absence of hydrogen, by two or more refining processes (1,942) |
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| 04/28/1981 | CA1100078A1 Process for preparing lubricating oil from used waste lubricating oil |
| 04/07/1981 | US4260476 Separation of aromatic hydrocarbons from petroleum fractions |
| 03/31/1981 | CA1098547A1 Etherification processing of light hydrocarbons |
| 03/17/1981 | US4256578 Waste oil recovery process |
| 03/17/1981 | US4256567 Pretreatment with sulfonating agents |
| 02/24/1981 | US4252637 Treatment with sodium and potassium hydroxides |
| 12/16/1980 | CA1091607A1 Method for reclaiming waste lubricating oils |
| 11/18/1980 | US4234409 Process for the production of lubricating blend stocks |
| 11/11/1980 | US4233140 Recycling and solvent extraction |
| 07/08/1980 | CA1081132A1 Waste oil recovery unit |
| 05/20/1980 | US4203933 For use as dielectric oils |
| 05/20/1980 | US4203827 Process for treating sour petroleum distillates |
| 05/06/1980 | US4201658 Separation using deasphalting solvent |
| 04/29/1980 | CA1076507A1 Rerefining of used motor oils |
| 03/25/1980 | US4194924 Process for reclaiming aircraft fuel tank purging fluids |
| 02/19/1980 | CA1072035A1 Production of lubricating oils blending stock and selected components for asphalt production |
| 02/05/1980 | CA1071132A1 Process for the reclamation of waste hydrocarbon oils |
| 01/01/1980 | US4181597 Method of stabilizing lube oils |
| 12/04/1979 | CA1067439A1 Process and apparatus for re-refining used petroleum products |
| 10/09/1979 | US4170551 Waste oil recovery unit |
| 09/25/1979 | US4169044 Re-refining used lube oil |
| 08/14/1979 | CA1060371A1 Process for reducing the sulfur content of hydrocarbon |
| 07/03/1979 | US4159937 Mixed-phase reaction product effluent separation process |
| 06/05/1979 | CA1055876A1 Process for the separation of aromatic hydrocarbons from a mixed hydrocarbon feedstock |
| 05/15/1979 | US4154670 For reuse |
| 04/17/1979 | US4149966 Method of removing elemental sulfur from hydrocarbon fuel |
| 03/20/1979 | CA1050914A1 Production of lubricating oils blending stocks |
| 01/30/1979 | US4137148 From waxy crude, solvent extraction, dewaxing over zeolite catalyst, hydrotreatment |
| 01/09/1979 | CA1046004A1 Method for removing sulfur and nitrogen in petroleum oils |
| 11/07/1978 | US4124492 Process for the reclamation of waste hydrocarbon oils |
| 10/24/1978 | US4121999 To remove mercaptans, phenolic catalyst toxins, and toxin precurso |
| 09/12/1978 | US4113604 Oxidation of residual mercaprans to disulfides |
| 07/18/1978 | US4101414 Rerefining of used motor oils |
| 05/30/1978 | US4092240 Refrigeration oil processing |
| 02/14/1978 | US4073720 Method for reclaiming waste lubricating oils |
| 02/14/1978 | US4073719 Process for preparing lubricating oil from used waste lubricating oil |
| 01/31/1978 | US4071438 Method of reclaiming waste oil by distillation and extraction |
| 01/24/1978 | US4070271 Catalytic oxidation of mercaptans and removal of naphthenic acids, catalyst toxins, and toxin precursors from petroleum distillates |
| 07/05/1977 | US4033860 Mercaptan conversion process |
| 11/02/1976 | US3989616 Vacuum distillation, solvent extraction, deasphalting |
| 06/01/1976 | US3960683 Irradiating with ultraviolet rays |
| 03/23/1976 | US3945914 Process for "sulfur reduction of an oxidized hydrocarbon by forming a metal-sulfur-containing compound" |