CN108085121A - Waste lubricant oil regeneration and the processing method for recycling aromatic hydrocarbons - Google Patents

Waste lubricant oil regeneration and the processing method for recycling aromatic hydrocarbons Download PDF

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Publication number
CN108085121A
CN108085121A CN201711418841.4A CN201711418841A CN108085121A CN 108085121 A CN108085121 A CN 108085121A CN 201711418841 A CN201711418841 A CN 201711418841A CN 108085121 A CN108085121 A CN 108085121A
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CN
China
Prior art keywords
oil
aromatic hydrocarbons
recycling
processing
distillation
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CN201711418841.4A
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Chinese (zh)
Inventor
郭本辉
张晓平
许发有
刘玉滨
胡宝其
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常州菲纳斯能源科技有限公司
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Priority to CN201711418841.4A priority Critical patent/CN108085121A/en
Publication of CN108085121A publication Critical patent/CN108085121A/en

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    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10MLUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M175/00Working-up used lubricants to recover useful products ; Cleaning
    • C10M175/0083Lubricating greases
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10MLUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M175/00Working-up used lubricants to recover useful products ; Cleaning
    • C10M175/0025Working-up used lubricants to recover useful products ; Cleaning by thermal processes
    • C10M175/0033Working-up used lubricants to recover useful products ; Cleaning by thermal processes using distillation processes; devices therefor
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10MLUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M175/00Working-up used lubricants to recover useful products ; Cleaning
    • C10M175/005Working-up used lubricants to recover useful products ; Cleaning using extraction processes; apparatus therefor

Abstract

The invention belongs to technical field of lubricating oil, are related to waste lubricant oil regeneration and recycle the processing method of aromatic hydrocarbons.The waste lubricant oil regeneration of the present invention and the processing method for recycling aromatic hydrocarbons, including:(a) after waste lubricating oil being filtered and is demulsified, the first oil mixture is obtained;(b) after the first oil mixture is distilled, the second oil mixture is obtained;(c) the second oil mixture with extractant is extracted, sedimentation separation is carried out after the completion of extraction, upper strata is the 3rd oil mixture, and lower floor is raffinate;(d) the 3rd oil mixture is distilled, obtains Reclaimed Base Oil;(e) raffinate is distilled, recycling design recycling, and extraction raffinate after being distilled;(f) extraction raffinate carries out rectification under vacuum after distilling, and obtains aromatic hydrocarbons.The yield of Reclaimed Base Oil can not only be improved, the quality of Reclaimed Base Oil is good, and the aromatic hydrocarbons progress after extracting is rectified purified, realizes environmental-friendly recycling aromatic hydrocarbons and resource reutilization.

Description

Waste lubricant oil regeneration and the processing method for recycling aromatic hydrocarbons
Technical field
The invention belongs to technical field of lubricating oil, and in particular to a kind of waste lubricant oil regeneration and the processing side for recycling aromatic hydrocarbons Method.
Background technology
Lubricating oil is extract in oil with high value-added product, usually by lube base oil and lubricating oil The compositions such as additive.Lubricating oil can cause in use because of physics, chemistry or the factors such as artificial its property occur fission or Impurity etc. is mixed into, its quality is made to be lower and becomes waste lubricating oil.By suitable technical matters by waste lubricant oil regeneration, change into The reclaimed oil that can be re-used, no matter from the perspective of technology, environmental protection, the utilization of resources and economy, all with important Realistic meaning.
Traditional process for regeneration of waste lubricating oil is mainly sulfuric acid-carclazyte method, including purification, pickling, clay-filtered and fractionation Step, purifying step include sedimentation, filtering, coalescence, vacuum flashing, mainly remove water, part light oil and mechanical admixture.It should The shortcomings that technique productions is that quality of reclaimed is poor, and the rate of recovery is low, and secondary pollution is serious.In addition, waste lubricant oil regeneration returns at present Skill of knocking off also has distillation-solvent refining-clay-filtered method, distillation-solvent refining-hydrofinishing method, distillation-extraction process And technologies, each renovation process such as emerging molecular distillation and membrane filtration have its advantage and shortcoming.
Distillation-extraction process, that is, chemical extraction regeneration technology therein is a kind of very effective, equal for all size scale Waste lubricating oil applicatory refines regeneration technology.Currently used is vacuum distillation-furfural extraction-clay regeneration technique, should Technique is will to be evaporated under reduced pressure obtained distillate first with furfural extraction, then with clay finishing, the namely regenerated base oil of product. The shortcomings that technique, is, emulsion is easily generated when being extracted using furfural extraction agent, and separation is relatively difficult;Furfural extraction Finish is more than the energy that high, solvent recovery consumes;Furfural has certain toxicity, harmful to the person and environment, does not adapt to The requirement of environmental protection.In addition, purification by liquid extraction effect and sedimentation separation effect are poor, the yield of Reclaimed Base Oil is influenced;It is mended using carclazyte It fills refined, not only reduces the yield of Reclaimed Base Oil, moreover, discarded carclazyte can also generate serious harm to environment.
Therefore, existing waste lubricant oil regeneration technology and technique also there is environmental pollution degree is big, cost of investment is high, The deficiencies such as oil quality and yield are low;In addition, existing waste lubricant oil regeneration technology and technique are all had ignored to waste lubricating oil In aromatic hydrocarbons recycling or processing, all without proposing preferably environmental-friendly aromatic recovery technology, it is impossible to preferably meet society It can develop, the requirement of environmental protection and the utilization of resources.
In consideration of it, special propose the present invention.
The content of the invention
It is an object of the invention to provide the processing method of a kind of waste lubricant oil regeneration and recycling aromatic hydrocarbons, process conditions temperature With, low energy consumption, easy to operate, can not only improve the yield of Reclaimed Base Oil, and the quality of Reclaimed Base Oil is good, and will extracting Aromatic hydrocarbons progress afterwards is rectified purified, realizes environmental-friendly recycling aromatic hydrocarbons and resource reutilization.
To achieve the above object, the technical solution adopted by the present invention is:
A kind of waste lubricant oil regeneration and the processing method for recycling aromatic hydrocarbons, comprise the following steps:
(a) after waste lubricating oil being filtered and is demulsified, the first oil mixture is obtained;
(b) after the first oil mixture is distilled, the second oil mixture is obtained;
(c) the second oil mixture with extractant is extracted, sedimentation separation is carried out after the completion of extraction, upper strata is the 3rd Oil mixture, lower floor are raffinate;
(d) the 3rd oil mixture is distilled, obtains Reclaimed Base Oil;
(e) raffinate is distilled, recycling design recycling, and extraction raffinate after being distilled;
(f) extraction raffinate carries out rectification under vacuum after distilling, and obtains aromatic hydrocarbons.
As further preferred technical solution, in step (a), it is filtered using basket filter, basket filter Mesh number is 60~100 mesh, is preferably 70~90 mesh, further preferably 80 mesh.
As further preferred technical solution, in step (a), demulsification operation includes:
The waste lubricating oil obtained after filtering is heated to temperature as 100~150 DEG C, when pressure is 0.01~0.05Mpa, is added Enter desalted water and demulsifier, after standing 6~10h, discharge moisture and mechanical admixture in waste lubricating oil, obtain the mixing of the first oil-containing Object.
As further preferred technical solution, step (b) includes:
(b1) the first oil mixture is flashed, obtains the second oil mixture;
(b2) the first oil mixture is cut by the way of distillation or evaporation, cuts into various distillates.
As further preferred technical solution, in step (b1), the temperature of flash distillation is 100~300 DEG C, vacuum degree for- 0.01~0.09Mpa;
Preferably, in step (b2), the distillation includes at least one of vacuum distillation and molecular distillation, the evaporation Including thin film evaporation.
As further preferred technical solution, in step (c), the extractant is dimethyl sulfoxide (DMSO).
As further preferred technical solution, in step (c), the volume ratio of extractant and the second oil mixture for 1~ 10:1;
Preferably, extraction temperature is 20~50 DEG C, and the sedimentation time is 10~60min.
As further preferred technical solution, the temperature of distillation is 60~200 DEG C in step (d), and vacuum degree is -0.01 ~-0.09MPa.
As further preferred technical solution, in step (e), the temperature of distillation is 60~200 DEG C, and vacuum degree is -0.01 ~-0.09MPa.
As further preferred technical solution, in step (f), the temperature of rectification under vacuum is 120~300 DEG C, vacuum degree For -0.01~-0.09MPa.
Compared with prior art, the beneficial effects of the present invention are:
1st, the processing method of waste lubricant oil regeneration of the invention and recycling aromatic hydrocarbons, is filtered waste lubricating oil and breaks first Breast eliminates moisture and mechanical admixture in some granule foreigns and waste lubricating oil;Then carry out distillation and remove a small amount of component And lighter component;Obtained oil mixture is extracted using extractant again, remove waste lubricating oil in aromatic hydrocarbons, metal, Carbon residue, chlorine etc. improve product colour;The upper oil phase being obtained by extraction is distilled, obtains Reclaimed Base Oil;It will be obtained by extraction Lower floor's extract liquor distilled, recycling design recycling, and by after distillation extraction raffinate carry out rectification under vacuum refine, recycling virtue Hydrocarbon.In this way, not only increasing the yield and quality of Reclaimed Base Oil, aromatic hydrocarbons has also effectively been recycled, has realized resource reutilization, drop Low production cost.
2nd, method of the invention, Reclaimed Base Oil high income, yield can reach 80~95%.
3rd, the Reclaimed Base Oil quality obtained by the method for the present invention is good, improves product photostability and oxidation is stable The properties such as property, reduce content of beary metal, improve product colour, reduce arene content.
4th, present invention employs environmental-friendly aromatic recovery technology, flow is simple, and low energy consumption, reduces equipment investment, Aromatics yield is high, and the aromatics yield that extraction raffinate is obtained through rectification under vacuum after distillation can reach more than 90%.
5th, the processing method of waste lubricant oil regeneration of the invention and recycling aromatic hydrocarbons, easy to operate, condition mitigates, environment friend Good, low energy consumption, and regeneration equipment investment is few, and operating cost is low, superior product quality, has great commercial introduction value.
Description of the drawings
It, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical solution of the prior art Embodiment or attached drawing needed to be used in the description of the prior art are briefly described, it should be apparent that, in describing below Attached drawing is some embodiments of the present invention, for those of ordinary skill in the art, before not making the creative labor It puts, can also be obtained according to these attached drawings other attached drawings.
Fig. 1 is waste lubricant oil regeneration provided in an embodiment of the present invention and the process flow schematic diagram for recycling aromatic hydrocarbons.
Specific embodiment
Embodiment of the present invention is described in detail below in conjunction with embodiment and embodiment, but this field skill Art personnel will be understood that following embodiments and embodiment are merely to illustrate the present invention, and be not construed as the model of the limitation present invention It encloses.Based on the embodiments of the present invention, those of ordinary skill in the art are obtained without making creative work Every other embodiment, belongs to the scope of protection of the invention.
A kind of waste lubricant oil regeneration is provided in some embodiments and recycles the processing method of aromatic hydrocarbons, is comprised the following steps:
(a) after waste lubricating oil being filtered and is demulsified, the first oil mixture is obtained;
(b) after the first oil mixture is distilled, the second oil mixture is obtained;
(c) the second oil mixture with extractant is extracted, sedimentation separation is carried out after the completion of extraction, upper strata is the 3rd Oil mixture, lower floor are raffinate;
(d) the 3rd oil mixture is distilled, obtains Reclaimed Base Oil;
(e) raffinate is distilled, recycling design recycling, and extraction raffinate after being distilled;
(f) extraction raffinate carries out rectification under vacuum after distilling, and obtains aromatic hydrocarbons.
The present invention is filtered waste lubricating oil and is demulsified first, eliminates in some granule foreigns and waste lubricating oil Moisture and mechanical admixture obtain the first oil mixture;Then by the first oil mixture carry out distillation remove a small amount of component and Lighter component obtains the second oil mixture;The second obtained oil mixture is extracted using extractant again, has been extracted Into rear carry out sedimentation separation, aromatic hydrocarbons, metal, carbon residue, chlorine in waste lubricating oil etc. are removed, improves product colour;Then to extraction The 3rd obtained oil mixture is distilled, and removes a small amount of solvent entrained by oil phase, the regeneration basis being had excellent performance Oil;The lower floor's raffinate being obtained by extraction is distilled again, recycling design recycling, and extraction raffinate after distillation is depressurized It is rectified purified, recycle aromatic hydrocarbons.In this way, not only increasing the yield and quality of Reclaimed Base Oil, aromatic hydrocarbons has also effectively been recycled, it is real Existing resource reutilization, reduces production cost, balances the relation of environmental protection, resource regeneration and financial cost well, realizes Abundant regeneration to waste lubricating oil.
Above-mentioned waste lubricant oil regeneration and the processing method for recycling aromatic hydrocarbons, Reclaimed Base Oil high income, yield can reach 80~ 95%;Obtained Reclaimed Base Oil quality is good, improves the properties such as product photostability and oxidation stability, and effectively improves viscous Index is spent, content of beary metal is reduced, improves product colour, reduce arene content;In addition, it additionally uses environmental-friendly Aromatic recovery technology, flow is simple, and low energy consumption, reduces equipment investment, aromatics yield is high, and extraction raffinate is obtained through rectification under vacuum after distillation To aromatics yield can reach more than 90%.
In a preferred embodiment, in step (c), the extractant is dimethyl sulfoxide (DMSO).
Extraction, is referred to as extracting, and is to the base oil component in waste lubricating oil and addition using some organic solvents The different characteristic of the impurities exhibits such as agent, oxidizer product, greasy filth, under certain condition, base oil and impurity are separated, and are obtained Reclaimed oil.Using extraction process in waste lubricant oil regeneration technology, etching apparatus, dirt that the process bands such as traditional sulfuric acid are come can be eliminated The problems such as contaminating environment, and it is simple for process, convenient and flexible operation, low energy consumption, efficient, and the regeneration oil quality of acquisition is good.
The present invention has carried out substantial amounts of solvent selection according to the terms and conditions requirement of extractant and has worked, and has chosen dimethyl Sulfoxide is as Novel Extractant, for the regeneration of waste lubricating oil.The result shows that it is stripped using dimethyl sulfoxide (DMSO), Neng Gouti The yield of high reclaimed oil, yield can reach 80~95%;And obtained Reclaimed Base Oil quality is good, improves viscosity and refers to Number, reduces content of beary metal, improves product colour, reduce arene content, improves product photostability and oxidation peace The properties such as qualitative.
It is good for some component dissolubilities in waste oil using dimethyl sulfoxide (DMSO) as extractant, be conducive to improve extraction Efficiency, density and viscosity is smaller, is conducive to enhance sedimentation separation effect, and then improves the yield of reclaimed oil.Extractant tool simultaneously There is good environmental-protecting performance, it is small to the person and environmental hazard;Extractant boiling point is relatively low, is easily recycled, and loss is few, after recycling directly Recycling;Extractant derives from a wealth of sources, and cheap, compared to the extraction of existing furfural or NMP or other mixed type solvents Agent is taken, there is better effect of extracting, it is easier to recycle and reuse, save production cost, actual application value is high, warp Ji high efficiency.
In a preferred embodiment, in step (c), the volume ratio of extractant and the second oil mixture for 1~ 10:1;Preferably 2~9:1, further preferably 3~8:1.Suitable oil ratio is conducive to improve effect of extracting, cost-effective, Reduce subsequent processing energy consumption.
In the present invention, the typical but non-limiting volume ratio of extractant and the second oil mixture is 1:1、2:1、3:1、 4:1、5:1、6:1、7:1、8:1、9:1 or 10:1.
Preferably, extraction temperature is 20~50 DEG C, and the sedimentation time is 10~60min.
Preferably, extraction temperature is 25~45 DEG C, and the sedimentation time is 20~50min;
It is highly preferred that extraction temperature is 28~40 DEG C, the sedimentation time is 25~45min.
The present invention is extracted under the conditions of relatively mild, without the process conditions of the harshness such as high temperature and pressure, and is avoided The pollutants such as acid sludge and waste water, environmental-friendly, with short production cycle, production efficiency is high.
In the present invention, it is 20 DEG C that extraction temperature is typical but non-limiting, 22 DEG C, 25 DEG C, 26 DEG C, 28 DEG C, 30 DEG C, 32 DEG C, 35 DEG C, 36 DEG C, 38 DEG C, 40 DEG C, 42 DEG C, 45 DEG C, 48 DEG C or 50 DEG C;Sedimentation time it is typical but non-limiting for 10min, 15min, 20min, 25min, 30min, 35min, 40min, 45min, 50min, 55min or 60min.
In a preferred embodiment, in step (a), it is filtered using basket filter, basket filter Mesh number is 60~100 mesh, is preferably 70~90 mesh, further preferably 80 mesh.
In a preferred embodiment, in step (a), demulsification operation includes:
The waste lubricating oil obtained after filtering is heated to temperature as 100~150 DEG C, pressure is 0.01~0.05Mpa, is added in Desalted water and demulsifier after standing 6~10h, discharge moisture and mechanical admixture in waste lubricating oil, obtain the first oil mixture.
In the present invention, waste lubricating oil first passes through the basket filter of preferably 80 mesh, and large granular impurity is fallen in coarse filtration;Filtering Waste lubricating oil afterwards carries out being heated to 100~150 DEG C, 0.01~0.05Mpa of pressure, while injects desalted water and demulsifier, quiet After putting 6~10h, the time of standing is preferably 8h, discharges moisture and mechanical admixture in waste lubricating oil, obtains the mixing of the first oil-containing Object.It is understood that type commonly used in the art can be used in desalted water therein and demulsifier.
It should be noted that in some embodiments, can by the first oil mixture obtained after demulsification directly into Row extraction, can also extract the second oil mixture obtained after distillation.
In a preferred embodiment, step (b) includes:
(b1) by the first oil mixture at 100~300 DEG C, vacuum degree is dodged under the conditions of being -0.01~0.09Mpa It steams, removes a small amount of moisture and lighter component, obtain the second oil mixture;
(b2) the first oil mixture is cut by the way of vacuum distillation, molecular distillation and/or thin film evaporation, Cut into various distillates.
It needs exist for illustrating, the cutting mode of the first oil mixture in the present invention including but not limited to depressurizes Distillation, molecular distillation, thin film evaporation with and combinations thereof, can also by the way of commonly used in the art and operating condition carry out Cutting, the present invention do not make this special restriction.
In a preferred embodiment, in step (d), the 3rd oil-containing of upper strata obtained after sedimentation separation is mixed Object is 60~200 DEG C in temperature, under the conditions of vacuum degree is -0.01~-0.09MPa, carries out flash distillation precipitation, removing oil phase is molten Solve a small amount of solvent carried.
In a preferred embodiment, in step (e), the lower floor's raffinate obtained after sedimentation separation is pumped into molten Agent retracting device is 60~200 DEG C in temperature, and vacuum degree carries out distillation purifying solvent under the conditions of being -0.01~-0.09MPa, Solvent after recycling repeats utilization.
In a preferred embodiment, in step (f), raffinate is after desolventizing, extraction raffinate after being distilled, rich For collection to a certain amount of carry out rectification under vacuum, temperature is 120~300 DEG C, and vacuum degree is -0.01~-0.09MPa, recycles aromatic hydrocarbons.
It can thus be seen that extractant of the present invention is easily recycled, easy to operate, condition mitigates, and loss is few, energy It consumes low, can directly be reused after recycling, and then production cost is greatly saved, significant effect.
In a preferred embodiment, the processing method of waste lubricant oil regeneration and recycling aromatic hydrocarbons, comprises the following steps:
(a) waste lubricating oil is first filtered using 80 mesh basket filters;
The waste lubricating oil obtained after filtering is heated to temperature as 100~150 DEG C again, pressure is 0.01~0.05Mpa, is added Enter desalted water and demulsifier, after standing 6~10h, discharge moisture and mechanical admixture in waste lubricating oil, obtain the mixing of the first oil-containing Object;
(b1) by the first oil mixture at 100~300 DEG C, vacuum degree is subtracted under the conditions of being -0.01~0.09Mpa Pressure distillation, removes a small amount of moisture and lighter component, obtains the second oil mixture;
(b2) the first oil mixture is cut by the way of vacuum distillation, molecular distillation and/or thin film evaporation, Cut into various distillates;
(c) the second oil mixture is extracted with extractant, extraction temperature is 20~50 DEG C, is carried out after the completion of extraction Sedimentation separation, sedimentation time are 10~60min, and upper strata is the 3rd oil mixture, and lower floor is raffinate;Wherein, the extraction Agent is taken as dimethyl sulfoxide (DMSO), the volume ratio of extractant and the second oil mixture is 1~10:1;
(d) the 3rd oil mixture of upper strata that will be obtained after sedimentation separation, temperature be 60~200 DEG C, vacuum degree for- Under the conditions of 0.01~-0.09MPa, flash distillation precipitation is carried out, a small amount of solvent that removing oil phase dissolving carries obtains Reclaimed Base Oil;
(e) the lower floor's raffinate that will be obtained after sedimentation separation is pumped into solvent recovery unit, is 60~200 DEG C in temperature, Vacuum degree is distillation purifying solvent under the conditions of -0.01~-0.09MPa, and the solvent obtained after recycling repeats utilization;
(f) raffinate is after desolventizing, extraction raffinate after being distilled, and is enriched with to a certain amount of carry out rectification under vacuum, temperature is 120~300 DEG C, vacuum degree is -0.01~-0.09MPa, recycles aromatic hydrocarbons.
With reference to specific embodiments and the drawings, the invention will be further described.
Embodiment 1
Fig. 1 shows waste lubricant oil regeneration and recycles the flow diagram of the processing method of aromatic hydrocarbons, as shown in Figure 1, described Waste lubricant oil regeneration and recycle aromatic hydrocarbons processing method, including:Waste lubricating oil first passes around filtering, demulsification (or deposition dehydrating) Afterwards, then it is evaporated under reduced pressure;Waste oil after vacuum distillation or after vacuum distillation and demulsification is extracted again with extractant, Sedimentation separation after the completion of extraction, upper strata obtain extraction oil phase, and lower floor obtains raffinate;It is de- that upper strata extraction oil phase is subjected to flash distillation It is molten to get to Reclaimed Base Oil;Lower floor's raffinate is evaporated under reduced pressure, recycling design recycling;It will be evaporated under reduced pressure to Extraction raffinate carries out rectification under vacuum to get to aromatic hydrocarbons after the distillation arrived.
A kind of waste lubricant oil regeneration and the processing method for recycling aromatic hydrocarbons, comprise the following steps:
(a) waste lubricating oil is first filtered using 80 mesh basket filters;
The waste lubricating oil obtained after filtering is heated to temperature as 100 DEG C, pressure 0.02Mpa again, add in desalted water and Demulsifier after standing 8h, discharges moisture and mechanical admixture in waste lubricating oil, obtains the first oil mixture;
(b1) by the first oil mixture at 100 DEG C, vacuum degree is evaporated under reduced pressure under the conditions of being -0.01Mpa, is removed A small amount of moisture and lighter component, obtain the second oil mixture;Second oil mixture therein can be vacuum 1st side cut tapped oil and/ Or second line of distillation tapped oil;
(b2) the first oil mixture is cut by the way of vacuum distillation, molecular distillation and/or thin film evaporation, Cut into various distillates;
(c) the second oil mixture is extracted with dimethyl sulfoxide (DMSO) extractant, extractant and the second oil mixture Volume ratio be 3:1, extraction temperature is 28 DEG C, and sedimentation separation, sedimentation time 30min, upper strata the are carried out after the completion of extraction Three oil mixtures, lower floor are raffinate;
(d) the 3rd oil mixture of upper strata that will be obtained after sedimentation separation, temperature be 200 DEG C, vacuum degree for- Under the conditions of 0.01MPa, flash distillation precipitation is carried out, a small amount of solvent that removing oil phase dissolving carries obtains Reclaimed Base Oil;
(e) the lower floor's raffinate that will be obtained after sedimentation separation is pumped into solvent recovery unit, is 200 DEG C in temperature, vacuum It spends for distillation purifying solvent under the conditions of -0.01MPa, the solvent recycling obtained after recycling;
(f) raffinate is after desolventizing, extraction raffinate after being distilled, and is enriched with to a certain amount of carry out rectification under vacuum, temperature is 120 DEG C, vacuum degree is -0.01MPa, recycles aromatic hydrocarbons.
The yield of the Reclaimed Base Oil of gained is 85% in the present embodiment, the aromatic hydrocarbons that extraction raffinate is obtained through rectification under vacuum after distillation Yield is 90%.
Embodiment 2
A kind of waste lubricant oil regeneration and the processing method for recycling aromatic hydrocarbons, comprise the following steps:
(a) waste lubricating oil is first filtered using 100 mesh basket filters;
The waste lubricating oil obtained after filtering is heated to temperature as 150 DEG C, pressure 0.05Mpa again, add in desalted water and Demulsifier after standing 8h, discharges moisture and mechanical admixture in waste lubricating oil, obtains the first oil mixture;
(b1) by the first oil mixture at 300 DEG C, vacuum degree is flashed under the conditions of being 0.09Mpa, removes a small amount of water Point and lighter component, obtain the second oil mixture;Second oil mixture therein can be vacuum 1st side cut tapped oil and/or subtract two Line tapped oil;
(b2) the first oil mixture is cut by the way of vacuum distillation, molecular distillation and/or thin film evaporation, Cut into various distillates;
(c) the second oil mixture is extracted with dimethyl sulfoxide (DMSO) extractant, extractant and the second oil mixture Volume ratio be 1:1, extraction temperature is 50 DEG C, and sedimentation separation, sedimentation time 60min, upper strata the are carried out after the completion of extraction Three oil mixtures, lower floor are raffinate;
(d) the 3rd oil mixture of upper strata that will be obtained after sedimentation separation, temperature be 80 DEG C, vacuum degree for- Under the conditions of 0.09MPa, flash distillation precipitation is carried out, a small amount of solvent that removing oil phase dissolving carries obtains Reclaimed Base Oil;
(e) the lower floor's raffinate that will be obtained after sedimentation separation is pumped into solvent recovery unit, is 80 DEG C in temperature, vacuum It spends for distillation purifying solvent under the conditions of -0.09MPa, the solvent obtained after recycling repeats utilization;
(f) raffinate is after desolventizing, extraction raffinate after being distilled, and is enriched with to a certain amount of carry out rectification under vacuum, temperature is 300 DEG C, vacuum degree is -0.09MPa, recycles aromatic hydrocarbons.
The yield of the Reclaimed Base Oil of gained is 82% in the present embodiment, the aromatic hydrocarbons that extraction raffinate is obtained through rectification under vacuum after distillation Yield is 94%.
Embodiment 3
A kind of waste lubricant oil regeneration and the processing method for recycling aromatic hydrocarbons, comprise the following steps:
(a) waste lubricating oil is first filtered using 80 mesh basket filters;
The waste lubricating oil obtained after filtering is heated to temperature as 125 DEG C, pressure 0.2Mpa again, add in desalted water and is broken Emulsion after standing 8h, discharges moisture and mechanical admixture in waste lubricating oil, obtains the first oil mixture;
(b1) by the first oil mixture at 150 DEG C, vacuum degree is evaporated under reduced pressure under the conditions of being 0.02Mpa, and removing is few Moisture and lighter component are measured, obtains the second oil mixture;Second oil mixture therein can be the line tapped oil that subtracts three and/or The line tapped oil that subtracts four;
(b2) the first oil mixture is cut by the way of vacuum distillation, molecular distillation and/or thin film evaporation, Cut into various distillates;
(c) the second oil mixture is extracted with dimethyl sulfoxide (DMSO) extractant, extractant and the second oil mixture Volume ratio be 4:1, extraction temperature is 30 DEG C, and sedimentation separation, sedimentation time 20min, upper strata the are carried out after the completion of extraction Three oil mixtures, lower floor are raffinate;
(d) the 3rd oil mixture of upper strata that will be obtained after sedimentation separation, temperature be 140 DEG C, vacuum degree for- Under the conditions of 0.05MPa, flash distillation precipitation is carried out, a small amount of solvent that removing oil phase dissolving carries obtains Reclaimed Base Oil;
(e) the lower floor's raffinate that will be obtained after sedimentation separation is pumped into solvent recovery unit, is 140 DEG C in temperature, vacuum It spends for distillation purifying solvent under the conditions of -0.05MPa, the solvent recycling obtained after recycling;
(f) raffinate is after desolventizing, extraction raffinate after being distilled, and is enriched with to a certain amount of carry out rectification under vacuum, temperature is 180 DEG C, vacuum degree is -0.05MPa, recycles aromatic hydrocarbons.
The yield of the Reclaimed Base Oil of gained is 91% in the present embodiment, the aromatic hydrocarbons that extraction raffinate is obtained through rectification under vacuum after distillation Yield is 96%.
Embodiment 4
A kind of waste lubricant oil regeneration and the processing method for recycling aromatic hydrocarbons, comprise the following steps:
(a) waste lubricating oil is first filtered using 80 mesh basket filters;
The waste lubricating oil obtained after filtering is heated to temperature as 130 DEG C, pressure 0.3Mpa again, add in desalted water and is broken Emulsion after standing 8h, discharges moisture and mechanical admixture in waste lubricating oil, obtains the first oil mixture;
(b1) by the first oil mixture at 200 DEG C, vacuum degree is evaporated under reduced pressure under the conditions of being 0.05Mpa, and removing is few Moisture and lighter component are measured, obtains the second oil mixture;Second oil mixture therein can be the line tapped oil that subtracts three and/or The line tapped oil that subtracts four;
(b2) the first oil mixture is cut by the way of vacuum distillation, molecular distillation and/or thin film evaporation, Cut into various distillates;
(c) the second oil mixture is extracted with dimethyl sulfoxide (DMSO) extractant, extractant and the second oil mixture Volume ratio be 5:1, extraction temperature is 38 DEG C, and sedimentation separation, sedimentation time 35min, upper strata the are carried out after the completion of extraction Three oil mixtures, lower floor are raffinate;
(d) the 3rd oil mixture of upper strata that will be obtained after sedimentation separation, temperature be 140 DEG C, vacuum degree for- Under the conditions of 0.06MPa, flash distillation precipitation is carried out, a small amount of solvent that removing oil phase dissolving carries obtains Reclaimed Base Oil;
(e) the lower floor's raffinate that will be obtained after sedimentation separation is pumped into solvent recovery unit, is 160 DEG C in temperature, vacuum It spends for distillation purifying solvent under the conditions of -0.04MPa, the solvent recycling obtained after recycling;
(f) raffinate is after desolventizing, extraction raffinate after being distilled, and is enriched with to a certain amount of carry out rectification under vacuum, temperature is 180 DEG C, vacuum degree is -0.05MPa, recycles aromatic hydrocarbons.
The yield of the Reclaimed Base Oil of gained is 95% in the present embodiment, the aromatic hydrocarbons that extraction raffinate is obtained through rectification under vacuum after distillation Yield is 96.5%.
Embodiment 5
A kind of waste lubricant oil regeneration and the processing method for recycling aromatic hydrocarbons, with differing only in for embodiment 4:
(c) the second oil mixture is extracted with dimethyl sulfoxide (DMSO) extractant, extractant and the second oil mixture Volume ratio be 10:1, extraction temperature is 20 DEG C, and sedimentation separation, sedimentation time 50min, upper strata the are carried out after the completion of extraction Three oil mixtures, lower floor are raffinate;
The yield of the Reclaimed Base Oil of gained is 92.5% in the present embodiment.
Comparative example 1
A kind of waste lubricant oil regeneration and the processing method for recycling aromatic hydrocarbons, with differing only in for embodiment 4:
Dimethyl sulfoxide (DMSO) extractant in step (c) is replaced with into N-Methyl pyrrolidone.
The yield of the Reclaimed Base Oil of gained is 70% in this comparative example.
Comparative example 2
A kind of waste lubricant oil regeneration and the processing method for recycling aromatic hydrocarbons, with differing only in for embodiment 4:
Dimethyl sulfoxide (DMSO) extractant in step (c) is replaced with into furfural.
The yield of the Reclaimed Base Oil of gained is 72% in this comparative example.
The feedstock property of waste lubricating oil used in above-described embodiment and comparative example is as shown in table 1.
1 waste lubricating oil feedstock property of table
Detection project Waste lubricating oil
40 DEG C of kinematic viscosity (mm2/s) 40.32
100 DEG C of kinematic viscosity (mm2/s) 6.32
Pour point (DEG C) - 24
Mechanical admixture (wt%) 1.18
Ash (wt%) 0.2
Moisture content (wt%) Trace
Condensation point DEG C - 24
Density (g/cm3) 0.8705
Appearance Black
Carbon residue (wt%) 0.21
Total metal content (ppm) 2877.6
The Reclaimed Base Oil obtained by embodiment 1-5 and comparative example 1-2 is subjected to quality index test, test result respectively As shown in table 2.
2 Quality of Reclaimed Base Oil index of table
Wherein, waste lubricating oil raw material and the test method of gained Reclaimed Base Oil are:According to standard GB/T/T8929- 2006 test water contents, kinematic viscosity is tested according to standard GB/T/T265, and Saybolt color is measured according to ASTMD156, According to standard GB/T/T1995 tested viscosity indexes, open flash point is tested according to standard GB/T/T3536, is marked according to country Quasi- GB/T3535 tests pour point, and acid value is tested according to standard GB/T/T7304, according to standard GB/T/T2013 test densitys, Test lubricating oil oxidation stability according to SH/T0193, according to ASTM-D6595-17 aes determinations metal and The test method of impurity measures tenor and impurity content, and saturated hydrocarbon content is measured using gas chromatography.
As can be seen from Table 2, the quality for the Reclaimed Base Oil that 1-5 of the embodiment of the present invention is provided is substantially better than comparative example 1- The quality of 2 Reclaimed Base Oils provided, especially in the index of viscosity index (VI), total metal content, colourity and acid value, has Superior effect;The yield for the Reclaimed Base Oil that 1-5 of the embodiment of the present invention is provided is also apparently higher than comparative example 1-2 institutes simultaneously The quality of the Reclaimed Base Oil of offer, the quality of Reclaimed Base Oil fully meet lube base oil standard HVI105 standards.
Thus illustrate, waste lubricant oil regeneration provided by the invention and the processing method for recycling aromatic hydrocarbons, process conditions are mild, energy Consume it is low, it is easy to operate, the yield of Reclaimed Base Oil can not only be improved, the quality of Reclaimed Base Oil is good, and will be after extracting Aromatic hydrocarbons progress is rectified purified, realizes environmental-friendly recycling aromatic hydrocarbons and resource reutilization.
Finally it should be noted that:The above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations;To the greatest extent Pipe is described in detail the present invention with reference to foregoing embodiments, it will be understood by those of ordinary skill in the art that:Its according to Can so modify to the technical solution recorded in foregoing embodiments either to which part or all technical characteristic into Row equivalent substitution;And these modifications or replacement, the essence of appropriate technical solution is not made to depart from various embodiments of the present invention technology The scope of scheme.

Claims (10)

1. a kind of waste lubricant oil regeneration and the processing method for recycling aromatic hydrocarbons, which is characterized in that comprise the following steps:
(a) after waste lubricating oil being filtered and is demulsified, the first oil mixture is obtained;
(b) after the first oil mixture is distilled, the second oil mixture is obtained;
(c) the second oil mixture with extractant is extracted, sedimentation separation is carried out after the completion of extraction, upper strata is the 3rd oil-containing Mixture, lower floor are raffinate;
(d) the 3rd oil mixture is distilled, obtains Reclaimed Base Oil;
(e) raffinate is distilled, recycling design recycling, and extraction raffinate after being distilled;
(f) extraction raffinate carries out rectification under vacuum after distilling, and obtains aromatic hydrocarbons.
2. waste lubricant oil regeneration according to claim 1 and the processing method for recycling aromatic hydrocarbons, which is characterized in that step (a) In, it is filtered using basket filter, the mesh number of basket filter is 60~100 mesh, is preferably 70~90 mesh, further excellent Elect 80 mesh as.
3. waste lubricant oil regeneration according to claim 1 and the processing method for recycling aromatic hydrocarbons, which is characterized in that step (a) In, demulsification operation includes:
The waste lubricating oil obtained after filtering is heated to temperature as 100~150 DEG C, when pressure is 0.01~0.05Mpa, is added in de- Brine and demulsifier after standing 6~10h, discharge moisture and mechanical admixture in waste lubricating oil, obtain the first oil mixture.
4. waste lubricant oil regeneration according to claim 1 and the processing method for recycling aromatic hydrocarbons, which is characterized in that step (b) Including:
(b1) the first oil mixture is flashed, obtains the second oil mixture;
(b2) the first oil mixture is cut by the way of distillation or evaporation, cuts into various distillates.
5. waste lubricant oil regeneration according to claim 4 and the processing method for recycling aromatic hydrocarbons, which is characterized in that step (b1) In, the temperature of flash distillation is 100~300 DEG C, and vacuum degree is -0.01~0.09Mpa;
Preferably, in step (b2), the distillation includes at least one of vacuum distillation and molecular distillation, and the evaporation includes Thin film evaporation.
6. waste lubricant oil regeneration according to claim 1 and the processing method for recycling aromatic hydrocarbons, which is characterized in that step (c) In, the extractant is dimethyl sulfoxide (DMSO).
7. waste lubricant oil regeneration according to claim 1 and the processing method for recycling aromatic hydrocarbons, which is characterized in that step (c) In, the volume ratio of extractant and the second oil mixture is 1~10:1;
Preferably, extraction temperature is 20~50 DEG C, and the sedimentation time is 10~60min.
8. waste lubricant oil regeneration according to claim 1 and the processing method for recycling aromatic hydrocarbons, which is characterized in that step (d) The temperature of middle distillation is 60~200 DEG C, and vacuum degree is -0.01~-0.09MPa.
9. waste lubricant oil regeneration according to claim 1 and the processing method for recycling aromatic hydrocarbons, which is characterized in that step (e) In, the temperature of distillation is 60~200 DEG C, and vacuum degree is -0.01~-0.09MPa.
10. according to the processing method of claim 1~9 any one of them waste lubricant oil regeneration and recycling aromatic hydrocarbons, feature exists In in step (f), the temperature of rectification under vacuum is 120~300 DEG C, and vacuum degree is -0.01~-0.09MPa.
CN201711418841.4A 2017-12-22 2017-12-22 Waste lubricant oil regeneration and the processing method for recycling aromatic hydrocarbons CN108085121A (en)

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