EP4453143A1 - Méthode de purification d'huiles lubrifiantes au moins en partie re-raffinées - Google Patents
Méthode de purification d'huiles lubrifiantes au moins en partie re-raffinéesInfo
- Publication number
- EP4453143A1 EP4453143A1 EP22840668.2A EP22840668A EP4453143A1 EP 4453143 A1 EP4453143 A1 EP 4453143A1 EP 22840668 A EP22840668 A EP 22840668A EP 4453143 A1 EP4453143 A1 EP 4453143A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- lubricating oil
- ppm
- regenerated
- partly
- refined
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G19/00—Refining hydrocarbon oils in the absence of hydrogen, by alkaline treatment
- C10G19/02—Refining hydrocarbon oils in the absence of hydrogen, by alkaline treatment with aqueous alkaline solutions
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G53/00—Treatment of hydrocarbon oils, in the absence of hydrogen, by two or more refining processes
- C10G53/02—Treatment of hydrocarbon oils, in the absence of hydrogen, by two or more refining processes plural serial stages only
- C10G53/12—Treatment of hydrocarbon oils, in the absence of hydrogen, by two or more refining processes plural serial stages only including at least one alkaline treatment step
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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
- C10M175/0016—Working-up used lubricants to recover useful products ; Cleaning with the use of chemical agents
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G2400/00—Products obtained by processes covered by groups C10G9/00 - C10G69/14
- C10G2400/10—Lubricating oil
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
- C10N2030/40—Low content or no content compositions
- C10N2030/41—Chlorine free or low chlorine content compositions
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2040/00—Specified use or application for which the lubricating composition is intended
- C10N2040/04—Oil-bath; Gear-boxes; Automatic transmissions; Traction drives
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2040/00—Specified use or application for which the lubricating composition is intended
- C10N2040/12—Gas-turbines
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2040/00—Specified use or application for which the lubricating composition is intended
- C10N2040/25—Internal-combustion engines
Definitions
- the present invention relates to the field of the re-refining or regeneration of used lubricating compositions. More specifically, the present invention relates to a method for purifying an at least partly re-refined lubricating oil, allowing access to a lubricating oil having in particular a reduced silicon content, suitable for its use as a base oil for the formulation of a new lubricating composition.
- Lubricating compositions are commonly used in mechanical systems for the main purposes of reducing the friction forces between the various moving metal parts and to prevent premature wear or even damage to these parts. , in particular of their surface. For example, they are used in various mechanical systems of vehicles, including the engine, the transmission or the hydraulic circuit.
- the lubricating compositions are subjected to stresses which cause their degradation and lead to an increase in the rate of undesirable elements, which may come from a degradation of the base oil itself or of the additives generally present in lubricating compositions, external pollutants, such as dust, elements emanating from the wear of the parts with which the oil is in contact during its use or even fuel fractions from the engine.
- a process for preparing a regenerated lubricating oil, advantageously having a reduced content of undesirable polycyclic aromatic hydrocarbons (PAHs) present in a used lubricating composition is also described in document WO 2018/109208, and comprises passing the lubricating composition used on activated carbon.
- PAHs polycyclic aromatic hydrocarbons
- these re-refined or regenerated oils generally comprise silicon contents still significantly higher than those of conventional base oils obtained directly from petroleum refining. .
- the present invention specifically aims to overcome the constraint linked to the presence of undesirable elements, such as silicon, in regenerated oils.
- the invention relates, according to a first of its aspects, to a process or a method for purifying an at least partly re-refined lubricating oil, said process comprising at least the following steps:
- step (b) recovery of said purified lubricating oil by separation of the strong base comprising the alkali or alkaline-earth metal cation from the product obtained at the end of step (a).
- step (a) of bringing the regenerated lubricating oil into contact with said strong base is carried out in the presence of water and, preferably, step (b) of separation of said strong base is carried out via one or more stages of filtration, distillation, decantation and/or liquid/liquid extraction, preferably liquid/liquid extraction, in particular with water.
- used lubricating composition (or more simply “used lubricant” or even “used oil”) is intended to denote any lubricating composition that has been used for the lubrication of moving parts, in particular metal parts, of a mechanical system, such as bearings, gears or motors.
- a used lubricating composition can come from different sources. In particular, as detailed in the rest of the text, it may be a lubricant that has been used for the lubrication of a motorization system, in particular "mobile”, or even for the lubrication of a so-called industrial system, especially "stationary".
- a used lubricating composition can be a mixture of several used lubricating compositions, coming from the same source or from several different sources.
- used lubricants include a number of degradation products derived from the oil itself or from the additives it contains, as well as metal particles, oxides metal and other elements, for example from the engine.
- a used oil can contain in particular a high content of undesirable elements, for example calcium (Ca), iron (Fe), magnesium (Mg), sodium (Na), nickel (Ni), phosphorus (P ), silicon (Si), chlorine (Cl), zinc (Zn) etc.
- the expression "new lubricating composition” within the meaning of the invention designates a lubricating composition which has not yet been used for the lubrication of the moving parts of a mechanical system, and who is ready for this use.
- the expression “at least partly re-refined lubricating oil”, also called more simply in the remainder of the text “regenerated oil” or even “recycled oil”, designates an oil derived at least partly from a used lubricating composition that has been subjected to one or more treatment steps, known as a re-refining treatment.
- an at least partly re-refined lubricating oil is obtained at the end of one or more stages of treatment of a used lubricant, aimed at eliminating, at least partly, a certain number of contaminating elements which are present there, such as dust, water, fuel fractions, metallic elements and other residues resulting from the degradation of the additives present in the lubricant.
- these pre-treatment steps to which the lubricating oils have been subjected, before their implementation in a purification process according to the invention can in particular be chosen from steps of dehydration, distillation, filtration, hydrogenation, liquid/liquid extraction, decantation and/or passage of the used lubricant over an adsorbent material, in particular over activated carbon.
- a composition at least partly re-refined according to the invention thus differs from a used lubricating oil or composition.
- the at least partly re-refined lubricating oil has in particular a reduced content of certain undesirable contaminants, for example water or fuel, and advantageously a reduced PAH content, and preferably satisfies a certain number of quality standards required for a basic lubricating oil.
- An at least partly re-refined lubricating oil according to the invention is also distinct from a virgin or new base oil (that is to say a refined base oil), in particular with regard to the silicon content present in the regenerated oil.
- an at least partly re-refined oil used in the treatment method according to the invention may comprise a particularly high silicon content and, in any event, undesirable for the implementation of this regenerated oil. for the formulation of a lubricating composition.
- the silicon content of a regenerated lubricating oil used in the purification process according to the invention may in particular be strictly greater than 2 ppm, preferably greater than or equal to 5 ppm, in particular greater than or equal to 10 ppm, plus particularly greater than or equal to 15 ppm, for example greater than or equal to 20 ppm, or even greater than or equal to 30 ppm.
- the silicon content of a regenerated lubricating oil can be up to 285 ppm, or even up to 290 ppm, or even up to 300 ppm.
- the silicon content can be evaluated by any method known to those skilled in the art, for example by X-ray fluorescence (XRE), by inductively coupled plasma atomic emission spectrometry (ICP-AES) or else by mass spectrometry at inductively coupled plasma (ICP-MS).
- XRE X-ray fluorescence
- ICP-AES inductively coupled plasma atomic emission spectrometry
- ICP-MS mass spectrometry at inductively coupled plasma
- the purification process according to the invention of a regenerated lubricating oil makes it possible to significantly reduce the silicon content present in the regenerated oil.
- the silicon content initially present in the regenerated lubricating oil can be reduced by at least 50% by weight of its initial value, in particular by at least 60%, advantageously by at least 70%, preferably by at least 80% of its initial value.
- the process according to the invention makes it possible to reduce the quantity of silicon to a content strictly less than 10 ppm, in particular less than or equal to 7 ppm, in particular less than or equal to 5 ppm.
- the purification process of the invention proves to be particularly advantageous for treating regenerated lubricating oils having, despite the re-refining treatments to which they have been subjected, a high residual silicon content, which is undesirable for their use. works as base oils for the formulation of new lubricants.
- the invention thus relates, according to another of its aspects, to a process or a method for reducing the silicon content in an at least partly re-refined lubricating oil, said process implementing at least steps (a) and (b) previously defined.
- It also relates to the use of at least one purification process according to the invention, implementing at least the aforementioned steps (a) and (b), to reduce the silicon content of a lubricating oil at least in part. re-refined.
- It also relates to a process for the preparation of an at least partly re-refined lubricating oil comprising less than 10 ppm, in particular less than 7 ppm, preferably less 5 ppm of silicon, from lubricating oil at least partly re-refined, said method implementing at least steps (a) and (b) defined above.
- the process of the invention advantageously makes it possible to reduce the content of other elements which may be considered undesirable, in particular chlorine, nitrogen and/or oxygen.
- These elements can prove to be undesirable at the level of the lubricant, in particular with regard to the effects of corrosion (for chlorine), modifications of the interfacial properties (for nitrogen) and tendency to oxidation (for oxygen) which they can spawn.
- the process of the invention in particular in the case where the regenerated oil comprises a high chlorine content, advantageously makes it possible to reduce in a manner this content significantly.
- Such a reduction in the chlorine content is advantageous in view of the undesirable effects of corrosion which may be caused by the hydrogen chloride which may be generated by the residual chlorine present in the lubricating oil.
- the chlorine content of a regenerated oil treated according to the invention is less than or equal to 30 ppm, in particular less than or equal to 25 ppm, and more particularly less than or equal to 10 ppm, or even less than or equal to 5 ppm .
- the invention thus relates to the use of a purification process according to the invention, implementing at least the aforementioned steps (a) and (b), to reduce the content of silicon, chlorine, oxygen and/or in nitrogen, in particular in silicon and/or in chlorine, more particularly in silicon of an at least partly re-refined lubricating oil.
- the process of the invention also makes it possible to reduce the boron and phosphorus contents present in the regenerated oils.
- the invention thus relates to the use of a purification process according to the invention, implementing at least the aforementioned steps (a) and (b), to reduce the silicon, chlorine, oxygen, nitrogen , boron and / or phosphorus, a lubricating oil at least partly re-refined.
- the regenerated and purified lubricating oil, obtained at the end of the treatment process according to the invention, proves to be particularly suitable, and this without requiring additional purification treatment, for its implementation as a base oil, for example for the purpose of being marketed as is, post-processed in fractions of different viscosities or even formulated with additives to produce a new lubricating composition.
- the method of the invention advantageously makes it possible to overcome the constraint of using regenerated lubricating oils for the formulation of new lubricants, linked to their silicon content.
- the lubricating oils regenerated and purified according to the process of the invention can be incorporated alone or mixed with one or more virgin base oils, for the formulation of a lubricant, without quantity limitation, since they do not contribute to increase the silicon content in the lubricant.
- the present invention also relates, according to another of its aspects, to the use of a lubricating oil regenerated and purified according to the process according to the invention, to formulate a new lubricating composition, in particular by adding it with one or several conventional additives in the field of lubricants.
- the invention relates in particular to a process or a method for preparing a lubricating composition comprising at least the following steps:
- step (i) purifying an at least partly re-refined lubricating oil by a purification process according to the invention as defined above, preferably said process not comprising any distillation step subsequent to step (b);
- step (ii) optionally, mixing said purified lubricating oil from step (i) with one or more other lubricating oils, in particular chosen from virgin base oils, lubricating oils regenerated and purified according to the process of the invention and at least partly re-refined lubricating oils;
- step (iii) supplementing said purified lubricating oil from step (i) or the mixture of lubricating oils from step (ii), with at least one additive, preferably chosen from friction modifier additives, extreme additives anti-wear additives, detergents, antioxidants, viscosity index improvers, pour point depressants, dispersants, anti-foaming agents, thickeners, and mixtures thereof.
- at least one additive preferably chosen from friction modifier additives, extreme additives anti-wear additives, detergents, antioxidants, viscosity index improvers, pour point depressants, dispersants, anti-foaming agents, thickeners, and mixtures thereof.
- the percentages are percentages by weight. The percentages are therefore expressed by mass relative to the total mass of the composition.
- the process of the invention makes it possible to purify any lubricating oil that is at least partly re-refined, called “regenerated oil”, in other words any lubricating oil resulting from a used lubricating composition having been subjected to one or more refining treatment steps.
- Used lubricating compositions and, consequently, regenerated lubricating oils comprise, in majority quantity, one or more base oils conventionally used in the field of lubricants, such as mineral, synthetic or natural, animal or vegetable oils or mixtures thereof. .
- It can be a mixture of several base oils, for example a mixture of two, three, or four base oils.
- base oils may in particular be oils of mineral or synthetic origin belonging to groups I to V according to the classes defined in the API classification (or their equivalents according to the ATIEL classification) and presented in the following table or their mixtures.
- the used lubricating composition from which the regenerated lubricating oil used in the process of the invention derives, may comprise at least 50% by weight of base oil(s) relative to its total weight, in particular at least 60% by weight of base oil(s), and more particularly between 60 and 99% by weight of base oil(s).
- the purification process according to the invention advantageously makes it possible to purify regenerated lubricating oils comprising one or more base oils from groups I, II, III and/or IV of the API classification, in particular from groups II and/or III.
- the regenerated lubricating oil, treated according to the invention can result from the treatment of a used lubricating composition having been used for the lubrication of a motorization system, in particular "mobile”, c ie including light vehicles, heavy vehicles, mobile machines known as “off road”, or marine vehicles.
- a motorization system in particular "mobile”, c ie including light vehicles, heavy vehicles, mobile machines known as “off road”, or marine vehicles.
- the regenerated lubricating oil, treated according to the invention can result from the treatment of a used lubricating composition having been used for the lubrication of a so-called industrial system, in particular "stationary”, that is to say including, without limitation, turbines, compressors, hydraulic systems, gears, or even forming or cutting machines.
- industrial system in particular "stationary”, that is to say including, without limitation, turbines, compressors, hydraulic systems, gears, or even forming or cutting machines.
- a used lubricating composition from which derives the regenerated lubricating oil to be treated according to the invention, may contain various conventional additives in the field of lubricants, such as friction modifier additives, extreme pressure additives, anti-wear additives, detergents, antioxidants, viscosity index (VI) improvers, pour point depressants (PPD), dispersing agents, antifoaming agents, thickeners, and mixtures thereof.
- friction modifier additives such as friction modifier additives, extreme pressure additives, anti-wear additives, detergents, antioxidants, viscosity index (VI) improvers, pour point depressants (PPD), dispersing agents, antifoaming agents, thickeners, and mixtures thereof.
- friction modifier additives such as friction modifier additives, extreme pressure additives, anti-wear additives, detergents, antioxidants, viscosity index (VI) improvers, pour point depressants (PPD), dispersing agents, antifoaming agents, thickeners, and mixtures thereof.
- the properties of the used lubricating composition are degraded due to its use, for a more or less long period, for the lubrication of a mechanical system, in particular a motorization system, such as a gasoline engine. combustion.
- used lubricating compositions may thus contain one or more additives described above and impurities resulting from the degradation of additives originally present in the lubricant, or resulting from the wear of moving mechanical parts.
- the composition of the used lubricant can of course be different depending on the origin of the lubricant, its initial formulation and the fact that it may have been contaminated differently depending on its use.
- the regenerated lubricating oil according to the invention comes more particularly from a used lubricating composition having been subjected to one or more prior pre-treatment steps known in the field of re-refining used lubricants.
- these processing steps aim to eliminate, at least partially, water, solid particles, fuel and/or other contaminants, such as PAHs, which are undesirable in the context of the formulation of lubricants.
- the regenerated lubricating oil according to the invention comes from a used lubricant having been subjected to one or more preliminary stages of dehydration, distillation, filtration, hydrogenation, liquid/liquid extraction , decanting and/or passing the used lubricant over an adsorbent material, preferably as detailed below.
- the invention also relates to a process or a method for preparing a regenerated and purified lubricating oil, comprising at least the steps consisting of:
- a lubricating oil at least partly re-refined from a used lubricating composition, said lubricating oil being in particular obtained by subjecting said used lubricating composition to at least one or more stages of dehydration, distillation, filtration, hydrogenation, liquid/liquid extraction, settling and/or passage of said used lubricating composition over an adsorbent material, preferably carried out under the conditions detailed below;
- the regenerated lubricating oil used in the process of the invention is obtained by subjecting a used lubricating composition to at least one prior step of dehydration. This dehydration step eliminates any water present in the used lubricant.
- the regenerated lubricating oil used according to the invention thus comprises a water content less than or equal to 10% by mass, in particular less than or equal to 5% by mass, in particular less than or equal to 5% by mass, in particular less or equal to 2% by mass and more particularly less than or equal to 1% by mass, relative to the total mass of said regenerated lubricating oil.
- This dehydration can be implemented by any method known to those skilled in the art, for example by distillation, decantation, heating or passing a flow of hot air over the used lubricating composition.
- the dehydration step can be carried out at a temperature of between 50°C and 250°C, preferably between 100°C and 200°C. In particular, it can be operated at a pressure of between 50,000 and 150,000 Pa, preferably at atmospheric pressure.
- the regenerated lubricating oil used in the process of the invention is obtained by subjecting a used lubricating composition to at least one prior filtration step.
- This filtration can be implemented by any method known to those skilled in the art.
- This filtration step may or may not be a particulate filtration step. It can for example be implemented by diatomaceous earth type systems.
- the regenerated lubricating oil used in the process of the invention is obtained by subjecting a used lubricating composition to at least one prior distillation step, preferably which follows a prior dehydration step.
- Said distillation step(s) can be implemented by any technique known to those skilled in the art. It may be, for example, an atmospheric distillation or else a distillation under reduced pressure.
- the distillations can for example be carried out at a temperature of between 100°C and 500°C, preferably between 200°C and 400°C, more preferably between 300°C and 380°C. In particular, they can be operated at a pressure of between 25 and 2000 Pa, preferably between 50 and 1000 Pa, more particularly between 50 and 250 Pa.
- the regenerated lubricating oil used in the process of the invention is obtained by subjecting a used lubricating composition to at least one prior step of passing said used lubricating composition over an adsorbent material.
- the adsorbent material advantageously makes it possible to selectively adsorb aromatic compounds, in particular polycyclic aromatic hydrocarbons (PAHs).
- PAHs polycyclic aromatic hydrocarbons
- passage over an adsorbent material, preferably over activated carbon advantageously makes it possible to reduce the content of polycyclic aromatic hydrocarbons (PAHs), chosen in particular from chrysene, benzo[b]fluoranthene, benzo[j]fluoranthene, benzo[k ]fluoranthene, benzo[e]pyrene, benzo[a]pyrene, dibenz[a,h]anthracene and/or benz[a]anthracene, of the used lubricating composition.
- PAHs polycyclic aromatic hydrocarbons
- Passage of the used lubricating composition over an adsorbent material is understood to mean the flow of the used lubricating composition over the adsorbent support.
- the adsorbent materials can be, for example, activated carbon, zeolites, clays or functionalized porous compounds. Preferably, it is activated carbon.
- the regenerated lubricating oil used in the process of the invention can be obtained from the treatment of a used lubricating composition according to the process described in document WO 2018/109208.
- the quantity of activated carbon used is preferably between 0.5 and 60 g of activated carbon per liter of used lubricating composition, preferably between 0.5 and 50 g/l, preferably from 1 to 50 g/l, preferably between 1 and 30 g/l, for example between 5 and 60 g/l, preferably between 5 and 50 g/l.
- the flow rate of the used lubricating composition can be between 1 m 3 /h and 15 m 3 /h, for example between 5 and 10 m 3 /h.
- the activated carbon is characterized by a density of between 200 and 500 kg/m 3 , for example measured according to standard ASTDM D2854.
- the activated carbon is a coal coal, preferably comprising from 70 to 95%, advantageously from 80 to 90% by weight of carbon.
- the step of passing the used lubricating composition over an adsorbent support, preferably over activated carbon, is advantageously preceded by the following preliminary steps: - one or more distillation steps;
- the regenerated lubricating oil used in the process of the invention can be obtained by subjecting a used lubricating composition to at least one prior stage of hydrogenation (or hydrotreatment), preferably which follows a prior stage of dehydration and/or distillation.
- Said hydrogenation step(s) can be implemented by any technique known to those skilled in the art and consist, in general, in treating the lubricating oil with hydrogen, generally in the presence of a catalyst. hydrotreating.
- Such a catalyst may contain, for example, at least one oxide or sulfide of at least one group VI metal and/or of at least one group VIII metal, such as molybdenum, tungsten, nickel or cobalt, and a support, for example alumina, silica-alumina or a zeolite.
- the regenerated lubricating oil used in the process of the invention can be obtained by subjecting a used lubricating composition to at least one prior step of liquid/liquid extraction by a solvent, preferably which follows a prior step of dehydration and/or distillation.
- a solvent preferably which follows a prior step of dehydration and/or distillation.
- liquid/liquid extraction by a solvent advantageously makes it possible to lighten a dark colored used oil, to eliminate at least in part the bad odor or the aromatic compounds, in particular the polycyclic aromatic hydrocarbons (PAHs).
- Said extraction step(s) can be implemented by any technique known to those skilled in the art.
- the extraction is generally carried out in a mixer-settler or in an extraction column, using an appropriate extraction solvent.
- the regenerated lubricating oil used in the method of the invention can be obtained by subjecting a used lubricating composition to at least one prior settling step.
- Said settling step(s) can be implemented by any technique known to those skilled in the art.
- the invention is in no way limited to the implementation of the regenerated oils obtained as described previously.
- the method of the invention can thus be used to purify any lubricating oil at least in part re-refined, in particular resulting from prior treatment steps different from those described above.
- the purification treatment according to the invention is implemented at the level of a fraction (“cut”) of lubricating oil at least partly rerefined and distilled, said distilled lubricating oil coming in particular from a used lubricant having been subjected to one or more preliminary treatment steps of dehydration, filtration, hydrogenation, liquid/liquid extraction, decantation and/or passage of the used lubricant over an adsorbent material.
- the regenerated lubricating oil implemented in step (a) of the purification process according to the invention is a fraction of a lubricating oil at least partly re-refined and distilled.
- the regenerated lubricating oil used in the process of the invention has a kinematic viscosity measured at 100° C. according to the ASTM D445 standard of between 2 and 12 niiif/s′ 1 . in particular between 3 and 10 ninf/s' 1 .
- the regenerated lubricating oil used in a purification process according to the invention is in particular characterized by a high silicon content, in particular strictly greater than 2 ppm, in particular greater than or equal to 5 ppm, more particularly greater than or equal to 10 ppm, in particular greater than or equal to 15 ppm, for example greater than or equal to 20 ppm, in particular possibly up to 300 ppm, in particular up to 290 ppm, for example up to 285 ppm.
- the regenerated lubricating oil used in a purification process according to the invention can also be characterized by a high content of one or more elements chosen from chlorine, oxygen and nitrogen. It may for example have a chlorine content of at least 5 ppm, in particular of at least 10 ppm, in particular greater than or equal to 20 ppm, in particular greater than or equal to 30 ppm.
- the chlorine content can for example be evaluated by any method known to those skilled in the art, for example by X-ray fluorescence (XRF).
- XRF X-ray fluorescence
- the regenerated lubricating oil used in a purification process according to the invention can also be characterized by a high content of boron and/or phosphorus.
- it may have a phosphorus content of at least 10 ppm, in particular of at least 15 ppm, in particular greater than or equal to 20 ppm.
- it may have a boron content of at least 10 ppm, or even at least 20 ppm, in particular greater than or equal to 30 ppm, or even greater than or equal to 50 ppm.
- the process for purifying a regenerated lubricating oil according to the invention comprises at least the steps consisting of:
- Bringing said regenerated lubricating oil into contact with said strong base may consist in adding said strong base to said regenerated lubricating oil, preferably within an autoclave.
- said regenerated lubricating oil is brought into contact with said strong base for a period of at least 1 minute, in particular ranging from 1 minute to 48 hours, preferably from 5 minutes to 2 hours.
- the contacting takes place at a temperature of at most 450° C., in particular at most 400° C., preferably at most 350° C.
- the contacting can be carried out at a temperature between 50° C. and 450° C., in particular between 90° C. and 350° C., more preferably between 150° C. and 350° C., in particular between 200° C. and 250°C, for example about 225°C.
- the contacting of said regenerated lubricating oil with said strong base is carried out for a period of 1 minute to 1 hour, in particular from 5 minutes to 40 minutes, and more particularly from 20 minutes to 40 minutes, for example approximately 30 minutes, in particular at a temperature of at most 450°C, in particular between 200°C and 250°C, for example approximately 225°C.
- the bringing into contact takes place at an absolute pressure of 0.1 to 100 bars, preferably of 1 to 50 bars, in particular of 1 to 10 bars, in particular of 1 to 5 bars.
- the regenerated lubricating oil is brought into contact with 0.1% to 40% by mass, in particular from 0.5 to 30% by mass, in particular from 1.0 to 20% by mass and more particularly from 1.0 to 5 0.0% by mass, of strong base comprising an alkali or alkaline-earth metal cation.
- the mass content of strong base means the mass content of strong base relative to the total mass of the mixture comprising the regenerated lubricating oil and the strong base in step (a).
- strong base within the meaning of the present invention, is meant a compound capable of capturing one or more protons and which, when brought into the presence of water, is completely protonated. Thus, one mole of strong base results in the release of one mole of hydroxide ion.
- These are in particular oxides and hydroxides of alkali or alkaline-earth metals.
- the strong base used in the process of the invention can for example be chosen from lithium hydroxide (LiOH), sodium hydroxide (NaOH), cesium hydroxide (CsOH), barium dihydroxide (Ba (OH)2), sodium oxide (Na2 ⁇ 3), potassium hydroxide (KOH), potassium oxide (K2O), calcium oxide (CaO), calcium dihydroxide (Ca (OH)2), magnesium oxide (MgO), magnesium dihydroxide (Mg(OH)2), and mixtures thereof.
- the strong base is chosen from NaOH, KOH and mixtures thereof, and more preferably is NaOH.
- the strong base can be brought into contact with the regenerated lubricating oil, in the solid state or in solution, in particular in water or in a polar solvent comprising an alcohol function and/or an ether function.
- step (a) of bringing the purification process of the invention into contact can be carried out in the presence of water.
- This variant is particularly preferred given its ease of implementation and the fact that it does not require the implementation of solvent that is expensive or difficult to recycle.
- the strong base added in step (a) is in solution in water.
- the regenerated lubricating oil can be brought into contact with an aqueous solution of a strong base comprising an alkali or alkaline-earth metal cation.
- a person skilled in the art is able to choose a sufficient quantity of water to dissolve/solubilize the strong base.
- the volume ratio of the strong base in solution in water to the regenerated lubricating oil i.e. the volume ratio (strong base + water)/oil
- the volume ratio (strong base + water)/oil can range from 0.1/99.9 to 80/ 20, in particular from 1/99 to 80/20, in particular from 1/99 to 70/30, preferably from 1/99 to 65/35, in particular from 1/99 to 60/40 and more particularly from 1/ 99 at 50/50.
- the contacting according to step (a) is preferably carried out for a period of 1 minute to 1 hour, in particular from 5 minutes to 40 minutes, in particular from 20 minutes to 40 minutes, for example about 30 minutes.
- this contacting step (a) is carried out at a temperature of 50 to 450° C., preferably of 90 to 350° C., more preferably of 150 to 350° C., for example approximately 225° C. , and at an absolute pressure of 0.1 to 100 bar, preferably 1 to 50 bar.
- step (a) of the method of the invention can be envisaged.
- the contacting of said regenerated oil with said strong base can be carried out in the presence of a polar solvent comprising an alcohol function and/or an ether function.
- the ratio between the volume of polar solvent and the volume of the regenerated lubricating oil and of the strong base can range from 1/99 to 95/10, from 1/99 to 90/10, from 2/98 to 90/10, from 2/98 to 85/15, from 2/98 to 80/20, from 2/98 to 75/25, from 2/98 to 70/30, from 2/98 to 65/35, from 2/98 to 60/40, 2/98 to 55/45, 2/98 to 50/50, 2/98 to 45/55, or 1/99 to 40/60, or any range defined by any two of the aforementioned terminals.
- the polar solvent can be more particularly chosen from (i) C 1 to C 4 alcohols, preferably from methanol, ethanol, propan-1-ol, propan-2-ol, butan-1-ol, butan-2-ol, 2-methylpropan-l-ol ethylene glycol, propylene glycol, (ii) alcohols comprising an ether function, preferably diethylene glycol, triethylene glycol, polyethylene glycol, polypropylene glycol and (iii) cyclic ethers, preferably tetrahydrofuran, 2-methyltetrahydrofuran, cyclopentylmethylether, tetrahydropyran, 1,4-dioxane, eucalyptol; and their mixtures.
- C 1 to C 4 alcohols preferably from methanol, ethanol, propan-1-ol, propan-2-ol, butan-1-ol, butan-2-ol, 2-methylpropan-l-ol ethylene glycol, propylene
- the bringing into contact according to step (a) is preferably carried out for a period of 1 minute to 48 hours, preferably from 5 minutes to 2 hours.
- this contacting step (a) is carried out at a temperature of 50 to 450° C., preferably of 90 to 350° C., more preferably of 150 to 350° C. and at an absolute pressure of 0.1 at 100 bars, preferably from 1 to 50 bars.
- the contacting of said regenerated oil with said strong base can be carried out in the absence of addition of solvent; in other words, the strong base is then added in solid form and not in solution.
- the bringing into contact according to step (a) is preferably carried out for a period of 1 minute to 48 hours, preferably from 5 minutes to 2 hours.
- this contacting step (a) is carried out at a temperature of 50 to 450° C., preferably of 90 to 350° C., more preferably of 150 to 350° C. and at an absolute pressure of 0.1 at 100 bars, preferably from 1 to 50 bars.
- the strong base is separated in order to recover said purified lubricating oil.
- the separation of the strong base after the contacting in step (a) can be carried out, for example, by filtration, distillation, extraction with a solvent, for example with water, decantation or by the combination of two, three or four of these steps.
- step (b) is more particularly chosen with regard to the conditions chosen to operate step (a).
- step (b) is carried out via one or more stages of filtration, distillation, decantation and/or liquid/liquid extraction, preferably liquid/liquid extraction, in particular with water .
- step (b) in particular in the case where step (a) of bringing the regenerated lubricating oil into contact with the strong base comprising an alkali or alkaline-earth metal cation is carried out in the presence of water , as described above, step (b) can be carried out by liquid/liquid extraction with water of the product resulting from step (a).
- liquid/liquid extraction with water or more simply “extraction by water”, is meant one or more stages of liquid/liquid extraction with water.
- the process for purifying an at least partly re-refined lubricating oil according to the invention comprises at least the following steps:
- step (b) separation of the strong base comprising the alkali or alkaline-earth metal cation from the product obtained at the end of step (a) via one or more liquid/liquid extraction steps with water.
- the water used does not contain a base and in particular does not contain a strong base comprising an alkali or alkaline-earth metal cation.
- An acid pH can be obtained by adding one or more organic or inorganic acids.
- usable organic acids include citric acid (COHSO?), formic acid (CH 2 O 2 ), acetic acid (CH 3 COOH), sulfamic acid (H3NSO3).
- inorganic acids are hydrochloric acid (HCl), nitric acid (HNO3), sulfuric acid (H2SO4), phosphoric acid (H3PO4).
- step (b) is carried out with water at neutral pH.
- Step (b) of extraction with water can be carried out at a temperature of 0° to 80° C., for example from 0° to 60° C., preferably from 0° to 40° C., advantage preferably from 0° to 30° C., in particular without external heating.
- Step (b) is typically carried out at atmospheric pressure.
- the water/product volume ratio resulting from step (a) can range from 10/90 to 90/10, from 20/80 to 80/20, from 30/70 to 70/ 30, from 35/65 to 65/35, from 35/65 to 60/40, from 40/60 to 60/40, or even within any interval defined by any two of the aforementioned limits.
- the product from step (a) and the water can be introduced into tanks, reactors or mixers commonly used in the profession and the two components can be mixed.
- Contacting may include vigorous agitation of the two components by a mixing device.
- the two components can be mixed together by agitation or by shaking.
- the contacting can be carried out in an enclosure in which the two components circulate against the current. This contact may occur more than once, in particular under the conditions presented above.
- Step (b) of extraction with water can optionally be preceded by one or more preliminary steps of separation of the strong base comprising the alkali or alkaline-earth metal cation in solution in water, for example by filtration, centrifugation, decantation or a combination of these steps.
- the strong base in solution in water separated at the end of step (b) can be returned (recycled), partially or totally, in step (a).
- step (b) to separate the regenerated and purified oil from the product obtained at the end of step (a) can still be considered.
- step (b) of separation between the strong base and the purified oil can be carried out by extraction with a polar solvent immiscible with the product obtained at the end of step (a).
- polar solvent immiscible with the product from step (a) within the meaning of the present invention, is meant a polar solvent forming a heterogeneous mixture with said product.
- immiscible with the product a solvent for which we obtain a rate defined as the ratio of the volume of polar solvent after extraction on the volume of initial polar solvent greater than or equal to 0.95, the volume of polar solvent after extraction corresponding to a phase containing said polar solvent, immiscible with the product from step (a) and recovered after stirring then settling of a mixture of one part by volume of polar solvent with twenty-five parts by volume of said product at atmospheric pressure and at a temperature of 20°C.
- the polar solvent(s) may be chosen from glycol ethers, including in particular polyethylene glycol of chemical formula HO-(CH2-CH2-O) n -H with a mass-average molar mass of 90 to 800 g/mol, for example diethylene glycol and tetraethylene glycol, polypropylene glycol of chemical formula H[OCH(CH3)CH2] n OH with a mass-average molar mass of 130 to 800 g/mol, for example dipropylene glycol and tetrapropylene glycol; dialkyl formamides, in which the alkyl group can comprise from 1 to 8 or from 1 to 3 carbon atoms, in particular N,N-dimethyl formamide (DMF); dialkyl sulfoxides, in which the alkyl group can comprise from 1 to 8 or from 1 to 3 carbon atoms, in particular dimethyl sulfoxide (DMSO) and sulfolane; compounds comprising a furan ring; cyclic carbonate esters, compris
- Water can have an acidic, basic or neutral pH.
- the liquid/liquid extraction step eliminates all or almost all of the alkaline or alkaline-earth cation content.
- step (b) preferably carried out by one or more extraction steps with water, makes it possible to obtain a purified oil having a mass content of alkaline or alkaline-earth cation of less than or equal to 2 ppm.
- the regenerated oil obtained at the end of step (b) of the process of the invention has a significantly reduced silicon content compared to the lubricating oil regenerated before the treatment. according to the invention introduced in step (a).
- the silicon content in the lubricating oil purified at the end of step (b) is strictly less than 10 ppm, in particular less than or equal to 7 ppm, in particular less than or equal to 5 ppm.
- the regenerated oil obtained at the end of step (b) of the process of the invention also has a reduced phosphorus and boron content.
- the phosphorus content in the lubricating oil purified at the end of step (b) is strictly less than 5 ppm, in particular less than or equal to 3 ppm and more particularly less than or equal to 1 ppm.
- the boron content in the lubricating oil purified at the end of step (b) can advantageously be strictly less than 5 ppm, in particular less than or equal to 3 ppm and more particularly less than or equal to 1 ppm.
- the method for purifying a regenerated lubricating oil according to the invention does not implement any distillation step subsequent to step (b).
- step (b) no step subsequent to step (b) is required.
- the lubricating oil recovered at the end of step (b) of the process according to the invention having a very low silicon content, is suitable as a base oil for the formulation of lubricants, in particular lubricants for mobile motorization systems or industrial systems, in the same way as a virgin base oil, without requiring further purification steps.
- the lubricating oil recovered at the end of step (b) thus has properties substantially comparable to those of virgin oils and in particular satisfies the quality standards of base oils.
- the lubricating oil purified at the end of the process of the invention can be used as a base oil to formulate a new lubricating composition.
- the invention thus relates, according to another of its aspects, to a process or method for preparing a new lubricating composition, comprising at least the steps consisting in: (i) recovering a purified lubricating oil from the treatment of a lubricating oil at least partly re-refined by a process according to the invention, as detailed above; (ii) optionally, mixing said purified lubricating oil from step (i) with one or more other lubricating oils; and (iii) supplementing said purified lubricating oil from step (i) or the mixture of lubricating oils from step (ii), with at least one additive.
- the additive or additives may be of any type suitable for use in a lubricant and chosen according to the destination of the lubricant.
- the reclaimed and purified base oil may be used alone or blended with one or more other lubricating oils, including one or more virgin base oils (i.e. newly refined lubricating oils that have never been used in lubricants), with one or more other base oils regenerated and purified by a process according to the invention or else with one or more regenerated lubricating oils resulting from known re-refining treatments.
- one or more virgin base oils i.e. newly refined lubricating oils that have never been used in lubricants
- other base oils regenerated and purified by a process according to the invention or else with one or more regenerated lubricating oils resulting from known re-refining treatments.
- the regenerated and purified base oil can be used to formulate lubricants for the lubrication of various mechanical systems.
- the regenerated and purified base oil can be used to formulate lubricants for the lubrication of a motorization system, in particular "mobile”, that is to say including light vehicles, heavy-duty vehicles, so-called “off-road” mobile machines, or marine vehicles.
- the regenerated and purified base oil can be used to formulate lubricants for the lubrication of a so-called industrial system, in particular "stationary”, that is to say including in a non-limiting way turbines, compressors, hydraulic systems, gears, or even forming or cutting machines.
- industrial system in particular "stationary”, that is to say including in a non-limiting way turbines, compressors, hydraulic systems, gears, or even forming or cutting machines.
- the re-refined and purified base oil according to the invention can be used to formulate lubricants for motorization systems, such as the transmission or the engine in a motorization system, in particular for heavy or light vehicles. or marine engines.
- the additives can be introduced individually and/or in the form of a mixture like those already marketed for commercial formulations of vehicle engine lubricants, with a level of performance as defined by the ACEA (Association of European Automobile Manufacturers) and/or API (American Petroleum Institute), known to those skilled in the art.
- These additives may in particular be chosen from friction modifier additives, extreme pressure additives, anti-wear additives, detergents, antioxidants, agents improving the viscosity index (VI), agents lowering the point of flow (PPD), dispersants, antifoaming agents, thickeners and mixtures thereof.
- additives can be added to a regenerated and purified base oil according to the invention in an appropriate amount determined by those skilled in the art.
- the silicon content of lubricating oils is determined by an analysis method based on X-ray fluorescence (XRF) after filtration of the sample.
- XRF X-ray fluorescence
- the chlorine, boron and phosphorus contents of the lubricating oils are quantified by an analysis method based on an XRF measurement after filtration of the sample.
- the nitrogen content of lubricating oils is quantified by chemiluminescence.
- the three lubricating oils treated are commercially available regenerated (or re-refined) lubricating oils.
- These regenerated oils contain in particular silicon that we wish to be able to eliminate.
- the regenerated lubricating oils were subjected to a purification process according to the invention, under the conditions detailed below.
- a 1.5 L AISI-316L grade stainless steel autoclave equipped with mechanical agitation is charged with regenerated lubricating oil 1 (493.2 g), a strong base in the form of NaOH (13.93 g ) and water (13.87 g), the strong base being dissolved in water before its introduction into the autoclave.
- the autoclave is closed and the gas overhead in the autoclave is flushed with nitrogen for 30 minutes at 1 bar.
- the autoclave is then heated under autogenous pressure with stirring at a speed of approximately 1500 rpm at a temperature of 225°C for a period of 30 minutes, once the target temperature has been reached.
- the pressure at the end of the test is 3 bars.
- the autoclave is cooled to room temperature then the contents are unloaded and extracted twice with 400 mL of millipore water to eliminate the strong base residues and the residual impurities.
- the autoclave as used for the first test is charged with the regenerated lubricating oil
- the autoclave is closed and the gas overhead in the autoclave is flushed with nitrogen for 30 minutes at 1 bar.
- the autoclave is then heated under autogenous pressure with stirring at a speed of approximately 1500 rpm at a temperature of 225°C for a period of 30 minutes, once the target temperature has been reached.
- the pressure at the end of the test is 5 bars.
- the autoclave is cooled to ambient temperature then the contents are discharged and extracted three times with 400 mL of millipore water.
- the autoclave as used for the first test is charged with the regenerated lubricating oil
- the autoclave is closed and the gas overhead in the autoclave is flushed with nitrogen for 30 minutes at 1 bar.
- the autoclave is then heated under autogenous pressure with stirring at a speed of approximately 1500 revolutions/minute at a temperature of 225° C. for a period of 30 minutes, once the target temperature has been reached.
- the pressure at the end of the test is 6 bars.
- the autoclave is cooled to ambient temperature then the contents are discharged and extracted three times with 400 mL of millipore water.
- the regenerated lubricating oils, before purification, and after purification and extraction as described above, are analyzed to measure the silicon, chlorine, oxygen and nitrogen contents according to the measurement protocols described above.
- the purification treatment made it possible to significantly reduce the silicon content in the three regenerated oils.
- the elimination of silicon is almost total in the three regenerated oils treated according to the invention.
- the treatment according to the invention also made it possible to significantly reduce the chlorine content.
- regenerated oil 3 used in example 1 as well as two other commercially available regenerated lubricating oils, were subjected to a purification process according to the invention, under the conditions described in example 1 for the regenerated oil 3.
- the purification treatment made it possible to significantly reduce the silicon, phosphorus and boron contents in the three regenerated oils.
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- Oil, Petroleum & Natural Gas (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Combustion & Propulsion (AREA)
- Lubricants (AREA)
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR2114080A FR3130826A1 (fr) | 2021-12-21 | 2021-12-21 | Méthode de purification d’huiles lubrifiantes au moins en partie re-raffinées |
| PCT/EP2022/086877 WO2023118063A1 (fr) | 2021-12-21 | 2022-12-20 | Méthode de purification d'huiles lubrifiantes au moins en partie re-raffinées |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4453143A1 true EP4453143A1 (fr) | 2024-10-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP22840668.2A Pending EP4453143A1 (fr) | 2021-12-21 | 2022-12-20 | Méthode de purification d'huiles lubrifiantes au moins en partie re-raffinées |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP4453143A1 (fr) |
| KR (1) | KR20240129188A (fr) |
| CN (1) | CN118891347A (fr) |
| FR (1) | FR3130826A1 (fr) |
| WO (1) | WO2023118063A1 (fr) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3151855A1 (fr) * | 2023-08-01 | 2025-02-07 | Totalenergies Onetech | Compositions lubrifiantes comprenant une huile re-raffinée |
| FR3156802A1 (fr) * | 2023-12-19 | 2025-06-20 | Totalenergies Onetech | Composition lubrifiante de compresseur à vis à base d’huile re-raffinée |
| FR3164222A1 (fr) | 2024-07-08 | 2026-01-09 | Totalenergies Onetech | Procede de purification d’huiles lubrifiantes au moins en partie re-raffinees par traitement basique sous irradiation micro-ondes |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE353838B (fr) | 1970-08-21 | 1973-02-19 | I Bolyos | |
| DE2041668B2 (de) | 1970-08-21 | 1972-11-02 | Kathrein-Werke, Anton Kathrein, 8200 Rosenheim | Sperrfilter |
| US3625881A (en) * | 1970-08-31 | 1971-12-07 | Berks Associates Inc | Crank case oil refining |
| FR2109395A5 (fr) | 1970-10-14 | 1972-05-26 | Telemecanique Electrique | |
| DE2818521A1 (de) * | 1978-04-27 | 1979-11-08 | Degussa | Verfahren zur wiederaufbereitung von gebrauchten schmieroelen (ii) |
| FR2725725B1 (fr) | 1994-10-17 | 1996-12-13 | Inst Francais Du Petrole | Procede et installation pour la purification des huiles usagees |
| FR2735785B1 (fr) * | 1995-06-22 | 1997-08-08 | Chavet Bernard | Procede de raffinage d'huiles usagees par traitement alcalin |
| DE60211041T2 (de) * | 2002-07-15 | 2006-12-07 | Sener Grupo de Ingenieria, S.A., Tres Cantos | VERFAHREN ZUR REGENERATION VON ALTÖLEN MITTELS LöSUNGSMITTELEXTRAKTION |
| FR2961521B1 (fr) * | 2010-06-22 | 2013-07-12 | Conception D Equipements Pour L Environnement Et L Ind Soc D | Procede de purification d'une charge hydrocarbonee usagee |
| FR3060406B1 (fr) | 2016-12-16 | 2021-02-12 | Total Marketing Services | Procede de traitement des huiles usagees |
| CN108485791A (zh) * | 2018-05-17 | 2018-09-04 | 濮阳市盛源石油化工(集团)有限公司 | 一种环保型废润滑油脱色去味再生工艺 |
-
2021
- 2021-12-21 FR FR2114080A patent/FR3130826A1/fr active Pending
-
2022
- 2022-12-20 KR KR1020247024454A patent/KR20240129188A/ko active Pending
- 2022-12-20 WO PCT/EP2022/086877 patent/WO2023118063A1/fr not_active Ceased
- 2022-12-20 CN CN202280090634.3A patent/CN118891347A/zh active Pending
- 2022-12-20 EP EP22840668.2A patent/EP4453143A1/fr active Pending
Also Published As
| Publication number | Publication date |
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| FR3130826A1 (fr) | 2023-06-23 |
| WO2023118063A1 (fr) | 2023-06-29 |
| KR20240129188A (ko) | 2024-08-27 |
| CN118891347A (zh) | 2024-11-01 |
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