US3773658A - Process for regenerating used lubricating oils - Google Patents

Process for regenerating used lubricating oils Download PDF

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Publication number
US3773658A
US3773658A US00150139A US3773658DA US3773658A US 3773658 A US3773658 A US 3773658A US 00150139 A US00150139 A US 00150139A US 3773658D A US3773658D A US 3773658DA US 3773658 A US3773658 A US 3773658A
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United States
Prior art keywords
solvent
residue
mixture
oil
vapors
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Expired - Lifetime
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US00150139A
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English (en)
Inventor
Q Vu
F Audibert
J Boucher
H Deville
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IFP Energies Nouvelles IFPEN
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IFP Energies Nouvelles IFPEN
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    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M175/00—Working-up used lubricants to recover useful products ; Cleaning
    • C10M175/005—Working-up used lubricants to recover useful products ; Cleaning using extraction processes; apparatus therefor

Definitions

  • ABSTRACT A process for regenerating used oils comprising contacting the same with a light paraffinic hydrocarbon as solvent, separating from the resulting mixture a solution of clarified oil and a residue, separating a substantial portion of the solvent from the clarified oil in a first flash zone, separating substantially the rest of the solvent from the clarified oil in a second flash zone, admixing with the residue a viscosity lowering agent, separating a substantial portion of the solvent vapors from the resulting mixture in a third flash zone and further separating substantially the rest of the solvent vapors from said residue in a fourth flash zone, eondensing the solvent vapors from the first, second and fourth zones and admixing the resulting condensate with the solvent vapors from the third zone.
  • the step of contacting the used oil with the light paraffinic hydrocarbon is generally conducted in a column from which there is withdrawn an overhead a mixture of paraffinic hydrocarbon and at least partially purified oil, thereafter called clarified oil, and a bottom residue containing the said paraffinic hydrocarbon.
  • the paraffinic hydrocarbon From the first mixture there is separated, generally by use of a series of flashes, the paraffinic hydrocarbon from the clarified oil. Said paraffinic hydrocarbon, after cooling, compression and condensation, is generally reused in a new purification step of used oil.
  • One of the objects of the present invention consists of carrying out the separation of the paraffinic hydrocarbon from the residue while avoiding the abovementioned drawbacks.
  • Another object of this invention consists of reducing the operating cost resulting in particular from the heating and the compression of the products.
  • Used oil is introduced through line 1 into the contact column 3 after admixture with a light paraffinic hydrocarbon, for example propane, fed through line 2.
  • a light paraffinic hydrocarbon for example propane
  • the oil has been optionally pretreated, for example, heated under vacuum (pretreatment not shown in the drawing).
  • the light paraffinic hydrocarbon or solvent will be considered, in the following description, for sake of simplification, as being propane; it must be understood however that the invention is not to be limited to this particular case.
  • the temperature and pressure conditions prevailing in the column are variable but generally close to the critical values of the paraffinic hydrocarbon; for example the temperature will be between and C and the pressure between 25 and 50 kglcm
  • At the lower part of the column there is withdrawn, through line 4, a sludge or viscous residue containing impurities,essentially of the asphaltene type, said residue carying along a part of the propane therewith.
  • the liquid product consisting essentially of oil still containing propane is withdrawn through line l0,'then heated in the oven 11, for example to a temperature of about -350C.
  • a part of the product issued from the oven through line 12 is conveyed, through line 7, to the inlet of the flash zone 8 and has the effect of heating the mixture from line 5.
  • a clarified oil substantially free of propane This oil may be subjected to finishing treatments, for example a treatment with sulfuric acid, followed with a treatment with earth completed with adistillation, itself followed by a treatment with earth of the purified oil cuts thus obtained.
  • propane vapors which, after condensation and recycling of the oil vapors carried along therewith, if any, are conveyed through line 17, to a compressor 18.
  • the propane vapors, issuingfrom said second flash zone are generally at a pressure of about 0.9 to 3 kg/cm.
  • 100C will be about 50 to 0.5 centistokes.
  • This liquid will be, for example, a hydrocarbon cut of the fuel oil type.
  • the volume ratio between the viscosity lowering agent and the residue will be from about 0.2 to about 5 and more particularly from 0.5 to 3.
  • the viscosity lowering agent is introduced through line 19.
  • the mixture of the residue with thefviscosity lowering agent, flowing through line 20, is first expanded by passage through the valve 32, and then reheated in a reheater (not shown on the drawing), it is finally introduced into a first flash zone for the residue 21, from where there are obtained, through line 22, propane vapors at a pressure substantially equal to that prevailing in line 9, for example a pressure of about kg/cm
  • the remaining liquid product issued from zone 21 is, afterv passage through line 23 equipped with the valve 24, conveyed to a second flash zone 25 of the residue.
  • the liquid circulating through line 30 is then admixed with the vapors from line 22, issued from the first flash zone of the residue 21.
  • line 2 is provided for recycling liquid solvent to the contact column 3, generally through a pump with one or more stages (not shown in the drawing). It is thus apparent from this drawing, that the solvent vapors obtained by pressure release of the residue in the first flash zone (line 22) do not flow through the cooler exchanger 29 of the indirect contact type, but are condensed by thermal exchange and direct contact with at least one part of the condensed vapors from the other flash zones which, on the contrary, have been condensed by indirect thermal exchange (exchanger 29).
  • volumetric ratio of viscosity lowering agent to residue is 0.2:1 to 5:1.
  • a process as defined by claim 1 wherein the volumetric ratio of viscosity lowering agent to residue is 0.521 to 3:1.
  • a process for regenerating used lubricating oils comprising contacting the used oils with a light liquid paraffinic hydrocarbon solvent; separating resulting contact mixture into a mixture of (a) clarified oil and solvent and (b) a viscous residue carrying along part of the solvent therewith, subjecting said mixture of (a) clarified oil andsolvent to a first pressure release and a first step of distillation of the solvent contained therein under a first pressure of 5-25 kg/cm, then to a second pressure release and a second step of distillation of the solvent contained therein under a second pressure of 0.9-3 kg/cm; and admixing to said (b) viscous residue carrying along a part of the solvent, with a hydrocarbon cut having a viscosity of 05-50 centistokes at 100C, and subjecting the resulting mixture of residue and hydrocarbon cut to a pressure release and a distillation of the solvent carried along therewith, wherein the latter distillation is conducted in two successive stages, a first stage at 5-25 kg/cm
  • both streams of solvent vapors obtained from the two pressure release and distillation of the mixture clarified oilsolvent and the stream of solvent vapors issued from the second pressure release of the residue are admixed with each other and condensed by indirect heat exchange with a coolant before being, at least partly, contacted directly with the stream of the solvent vapors issued from the first pressure release of the residue, this direct contact resulting in the condensation of the vapors issuing from said first pressure release of the residue.
  • the hydrocarbon cut is a fuel oil cut.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Chemistry (AREA)
  • Lubricants (AREA)
  • Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
US00150139A 1970-06-08 1971-06-04 Process for regenerating used lubricating oils Expired - Lifetime US3773658A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7021053A FR2096690B1 (fr) 1970-06-08 1970-06-08

Publications (1)

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US3773658A true US3773658A (en) 1973-11-20

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US00150139A Expired - Lifetime US3773658A (en) 1970-06-08 1971-06-04 Process for regenerating used lubricating oils

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US (1) US3773658A (fr)
FR (1) FR2096690B1 (fr)
GB (1) GB1318150A (fr)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3864242A (en) * 1973-12-13 1975-02-04 Imamura Seisakusho Kk Treating muddy-like waste oily material
US4097369A (en) * 1975-02-28 1978-06-27 Adolf Schmids Erben Aktiengesellschaft Process for reclaiming used hydrocarbon oils
DE2747374A1 (de) * 1976-10-22 1978-07-20 Us Energy Verfahren zur wiederaufbereitung von abfallschmieroel
US4169044A (en) * 1977-07-21 1979-09-25 Phillips Petroleum Company Re-refining used lube oil
US4302325A (en) * 1980-10-28 1981-11-24 Delta Central Refining, Inc. Solvent extraction process for rerefining used lubricating oil
US4342645A (en) * 1980-10-28 1982-08-03 Delta Central Refining, Inc. Method of rerefining used lubricating oil
US4360420A (en) * 1980-10-28 1982-11-23 Delta Central Refining, Inc. Distillation and solvent extraction process for rerefining used lubricating oil
US4399025A (en) * 1980-10-28 1983-08-16 Delta Central Refining, Inc. Solvent extraction process for rerefining used lubricating oil
US5286380A (en) * 1990-05-14 1994-02-15 Petroleum Technology Corporation Apparatus for contaminated oil reclamation
US6174431B1 (en) * 1998-05-28 2001-01-16 Interline Hydrocarbon, Inc. Method for obtaining base oil and removing impurities and additives from used oil products
WO2002011850A1 (fr) * 2000-08-08 2002-02-14 Petronetics, Lc Traitement par lots dans le raffinage de l'huile usagee
US20020166134A1 (en) * 1999-06-18 2002-11-07 Field Loren J. Cardiomyocytes with enhanced proliferative potenial, and methods for preparing and using same
US20030116290A1 (en) * 2001-12-20 2003-06-26 3M Innovative Properties Company Continuous process for controlled evaporation of black liquor
US6869501B2 (en) 2001-12-20 2005-03-22 3M Innovative Properties Company Continuous process for controlled concentration of colloidal solutions

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1107673A (fr) * 1977-05-16 1981-08-25 Gerhard P. Nowack Recyclage des huiles lubrifiantes epuisees

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3864242A (en) * 1973-12-13 1975-02-04 Imamura Seisakusho Kk Treating muddy-like waste oily material
US4097369A (en) * 1975-02-28 1978-06-27 Adolf Schmids Erben Aktiengesellschaft Process for reclaiming used hydrocarbon oils
DE2747374A1 (de) * 1976-10-22 1978-07-20 Us Energy Verfahren zur wiederaufbereitung von abfallschmieroel
US4169044A (en) * 1977-07-21 1979-09-25 Phillips Petroleum Company Re-refining used lube oil
US4302325A (en) * 1980-10-28 1981-11-24 Delta Central Refining, Inc. Solvent extraction process for rerefining used lubricating oil
US4342645A (en) * 1980-10-28 1982-08-03 Delta Central Refining, Inc. Method of rerefining used lubricating oil
US4360420A (en) * 1980-10-28 1982-11-23 Delta Central Refining, Inc. Distillation and solvent extraction process for rerefining used lubricating oil
US4399025A (en) * 1980-10-28 1983-08-16 Delta Central Refining, Inc. Solvent extraction process for rerefining used lubricating oil
US5286380A (en) * 1990-05-14 1994-02-15 Petroleum Technology Corporation Apparatus for contaminated oil reclamation
US6174431B1 (en) * 1998-05-28 2001-01-16 Interline Hydrocarbon, Inc. Method for obtaining base oil and removing impurities and additives from used oil products
EP1097189A1 (fr) * 1998-05-28 2001-05-09 Interliner Hydrocarbon Inc. Procede permettant d'obtenir de l'huile de base et d'elimination de contaminants et d'additifs d'huiles usees
EP1097189A4 (fr) * 1998-05-28 2003-07-23 Interliner Hydrocarbon Inc Procede permettant d'obtenir de l'huile de base et d'elimination de contaminants et d'additifs d'huiles usees
US20020166134A1 (en) * 1999-06-18 2002-11-07 Field Loren J. Cardiomyocytes with enhanced proliferative potenial, and methods for preparing and using same
WO2002011850A1 (fr) * 2000-08-08 2002-02-14 Petronetics, Lc Traitement par lots dans le raffinage de l'huile usagee
US20030116290A1 (en) * 2001-12-20 2003-06-26 3M Innovative Properties Company Continuous process for controlled evaporation of black liquor
US6869501B2 (en) 2001-12-20 2005-03-22 3M Innovative Properties Company Continuous process for controlled concentration of colloidal solutions

Also Published As

Publication number Publication date
FR2096690A1 (fr) 1972-02-25
FR2096690B1 (fr) 1974-08-09
GB1318150A (en) 1973-05-23

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