ZA200609310B - Process for the purification of spent process oil - Google Patents
Process for the purification of spent process oil Download PDFInfo
- Publication number
- ZA200609310B ZA200609310B ZA200609310A ZA200609310A ZA200609310B ZA 200609310 B ZA200609310 B ZA 200609310B ZA 200609310 A ZA200609310 A ZA 200609310A ZA 200609310 A ZA200609310 A ZA 200609310A ZA 200609310 B ZA200609310 B ZA 200609310B
- Authority
- ZA
- South Africa
- Prior art keywords
- oil
- mixture
- group
- acid
- purification
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims description 55
- 230000008569 process Effects 0.000 title claims description 42
- 239000010734 process oil Substances 0.000 title claims description 35
- 238000000746 purification Methods 0.000 title claims description 25
- 239000003921 oil Substances 0.000 claims description 64
- 238000000926 separation method Methods 0.000 claims description 52
- 239000000654 additive Substances 0.000 claims description 38
- 230000000996 additive effect Effects 0.000 claims description 36
- 239000000203 mixture Substances 0.000 claims description 32
- WWZKQHOCKIZLMA-UHFFFAOYSA-N octanoic acid Chemical compound CCCCCCCC(O)=O WWZKQHOCKIZLMA-UHFFFAOYSA-N 0.000 claims description 24
- 239000007788 liquid Substances 0.000 claims description 16
- 239000002253 acid Substances 0.000 claims description 14
- 150000007513 acids Chemical class 0.000 claims description 14
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 13
- 238000001914 filtration Methods 0.000 claims description 13
- 239000010731 rolling oil Substances 0.000 claims description 13
- 239000005635 Caprylic acid (CAS 124-07-2) Substances 0.000 claims description 12
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 claims description 12
- 229960002446 octanoic acid Drugs 0.000 claims description 12
- 229960004418 trolamine Drugs 0.000 claims description 12
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims description 9
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 claims description 9
- POULHZVOKOAJMA-UHFFFAOYSA-N dodecanoic acid Chemical compound CCCCCCCCCCCC(O)=O POULHZVOKOAJMA-UHFFFAOYSA-N 0.000 claims description 8
- 239000010687 lubricating oil Substances 0.000 claims description 7
- OBETXYAYXDNJHR-SSDOTTSWSA-M (2r)-2-ethylhexanoate Chemical compound CCCC[C@@H](CC)C([O-])=O OBETXYAYXDNJHR-SSDOTTSWSA-M 0.000 claims description 6
- OBETXYAYXDNJHR-UHFFFAOYSA-N alpha-ethylcaproic acid Natural products CCCCC(CC)C(O)=O OBETXYAYXDNJHR-UHFFFAOYSA-N 0.000 claims description 6
- 125000004432 carbon atom Chemical group C* 0.000 claims description 6
- 239000002480 mineral oil Substances 0.000 claims description 6
- 230000003068 static effect Effects 0.000 claims description 6
- 238000002844 melting Methods 0.000 claims description 5
- 230000008018 melting Effects 0.000 claims description 5
- 239000005639 Lauric acid Substances 0.000 claims description 4
- 235000010446 mineral oil Nutrition 0.000 claims description 4
- 238000002156 mixing Methods 0.000 claims description 4
- 238000002360 preparation method Methods 0.000 claims description 4
- 238000003828 vacuum filtration Methods 0.000 claims description 4
- WRIDQFICGBMAFQ-UHFFFAOYSA-N (E)-8-Octadecenoic acid Natural products CCCCCCCCCC=CCCCCCCC(O)=O WRIDQFICGBMAFQ-UHFFFAOYSA-N 0.000 claims description 3
- LQJBNNIYVWPHFW-UHFFFAOYSA-N 20:1omega9c fatty acid Natural products CCCCCCCCCCC=CCCCCCCCC(O)=O LQJBNNIYVWPHFW-UHFFFAOYSA-N 0.000 claims description 3
- WXBXVVIUZANZAU-UHFFFAOYSA-N 2E-decenoic acid Natural products CCCCCCCC=CC(O)=O WXBXVVIUZANZAU-UHFFFAOYSA-N 0.000 claims description 3
- QSBYPNXLFMSGKH-UHFFFAOYSA-N 9-Heptadecensaeure Natural products CCCCCCCC=CCCCCCCCC(O)=O QSBYPNXLFMSGKH-UHFFFAOYSA-N 0.000 claims description 3
- 239000005642 Oleic acid Substances 0.000 claims description 3
- ZQPPMHVWECSIRJ-UHFFFAOYSA-N Oleic acid Natural products CCCCCCCCC=CCCCCCCCC(O)=O ZQPPMHVWECSIRJ-UHFFFAOYSA-N 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 239000000356 contaminant Substances 0.000 claims description 3
- YAQXGBBDJYBXKL-UHFFFAOYSA-N iron(2+);1,10-phenanthroline;dicyanide Chemical compound [Fe+2].N#[C-].N#[C-].C1=CN=C2C3=NC=CC=C3C=CC2=C1.C1=CN=C2C3=NC=CC=C3C=CC2=C1 YAQXGBBDJYBXKL-UHFFFAOYSA-N 0.000 claims description 3
- QXJSBBXBKPUZAA-UHFFFAOYSA-N isooleic acid Natural products CCCCCCCC=CCCCCCCCCC(O)=O QXJSBBXBKPUZAA-UHFFFAOYSA-N 0.000 claims description 3
- WQEPLUUGTLDZJY-UHFFFAOYSA-N n-Pentadecanoic acid Natural products CCCCCCCCCCCCCCC(O)=O WQEPLUUGTLDZJY-UHFFFAOYSA-N 0.000 claims description 3
- ZQPPMHVWECSIRJ-KTKRTIGZSA-N oleic acid Chemical compound CCCCCCCC\C=C/CCCCCCCC(O)=O ZQPPMHVWECSIRJ-KTKRTIGZSA-N 0.000 claims description 3
- WXBXVVIUZANZAU-CMDGGOBGSA-N trans-2-decenoic acid Chemical compound CCCCCCC\C=C\C(O)=O WXBXVVIUZANZAU-CMDGGOBGSA-N 0.000 claims description 3
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 2
- 235000019198 oils Nutrition 0.000 description 62
- 239000012535 impurity Substances 0.000 description 17
- 239000000126 substance Substances 0.000 description 15
- 239000012530 fluid Substances 0.000 description 13
- 239000007787 solid Substances 0.000 description 11
- 235000014113 dietary fatty acids Nutrition 0.000 description 10
- 239000000194 fatty acid Substances 0.000 description 10
- 229930195729 fatty acid Natural products 0.000 description 10
- 150000004665 fatty acids Chemical class 0.000 description 10
- 239000002245 particle Substances 0.000 description 7
- 229910000831 Steel Inorganic materials 0.000 description 5
- 238000004458 analytical method Methods 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 230000003993 interaction Effects 0.000 description 4
- OFBQJSOFQDEBGM-UHFFFAOYSA-N Pentane Chemical compound CCCCC OFBQJSOFQDEBGM-UHFFFAOYSA-N 0.000 description 3
- 238000002835 absorbance Methods 0.000 description 3
- 230000006378 damage Effects 0.000 description 3
- 239000000314 lubricant Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 229940042472 mineral oil Drugs 0.000 description 3
- 238000005191 phase separation Methods 0.000 description 3
- HZAXFHJVJLSVMW-UHFFFAOYSA-N 2-Aminoethan-1-ol Chemical compound NCCO HZAXFHJVJLSVMW-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000005662 Paraffin oil Substances 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 239000000460 chlorine Substances 0.000 description 2
- 229910052801 chlorine Inorganic materials 0.000 description 2
- 238000002329 infrared spectrum Methods 0.000 description 2
- 230000001050 lubricating effect Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 229920002959 polymer blend Polymers 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 239000011573 trace mineral Substances 0.000 description 2
- 235000013619 trace mineral Nutrition 0.000 description 2
- QWOZZTWBWQMEPD-UHFFFAOYSA-N 1-(2-ethoxypropoxy)propan-2-ol Chemical compound CCOC(C)COCC(C)O QWOZZTWBWQMEPD-UHFFFAOYSA-N 0.000 description 1
- 241000024127 Argina Species 0.000 description 1
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 238000005033 Fourier transform infrared spectroscopy Methods 0.000 description 1
- 241001465754 Metazoa Species 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- 235000006708 antioxidants Nutrition 0.000 description 1
- 125000004429 atom Chemical group 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- CJZGTCYPCWQAJB-UHFFFAOYSA-L calcium stearate Chemical class [Ca+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O CJZGTCYPCWQAJB-UHFFFAOYSA-L 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 150000001991 dicarboxylic acids Chemical class 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000003925 fat Substances 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000005189 flocculation Methods 0.000 description 1
- 230000016615 flocculation Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000011146 organic particle Substances 0.000 description 1
- 229920000620 organic polymer Polymers 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 239000004071 soot Substances 0.000 description 1
- 235000015112 vegetable and seed oil Nutrition 0.000 description 1
- 239000008158 vegetable oil Substances 0.000 description 1
- 235000013311 vegetables Nutrition 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
-
- 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
- C10G21/00—Refining of hydrocarbon oils, in the absence of hydrogen, by extraction with selective solvents
- C10G21/06—Refining of hydrocarbon oils, in the absence of hydrogen, by extraction with selective solvents characterised by the solvent used
- C10G21/12—Organic compounds only
- C10G21/16—Oxygen-containing compounds
-
- 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
- C10G21/00—Refining of hydrocarbon oils, in the absence of hydrogen, by extraction with selective solvents
- C10G21/06—Refining of hydrocarbon oils, in the absence of hydrogen, by extraction with selective solvents characterised by the solvent used
- C10G21/12—Organic compounds only
- C10G21/20—Nitrogen-containing compounds
-
- 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
- C10G21/00—Refining of hydrocarbon oils, in the absence of hydrogen, by extraction with selective solvents
- C10G21/06—Refining of hydrocarbon oils, in the absence of hydrogen, by extraction with selective solvents characterised by the solvent used
- C10G21/12—Organic compounds only
- C10G21/27—Organic compounds not provided for in a single one of groups C10G21/14 - C10G21/26
-
- 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
- C10G31/00—Refining of hydrocarbon oils, in the absence of hydrogen, by methods not otherwise provided for
- C10G31/10—Refining of hydrocarbon oils, in the absence of hydrogen, by methods not otherwise provided for with the aid of centrifugal force
-
- 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
- C10M175/0008—Working-up used lubricants to recover useful products ; Cleaning with the use of adsorbentia
-
- 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
- C10M175/0058—Working-up used lubricants to recover useful products ; Cleaning by filtration and centrifugation processes; apparatus therefor
-
- 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
- C10M175/02—Working-up used lubricants to recover useful products ; Cleaning mineral-oil based
-
- 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
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/10—Carboxylix acids; Neutral salts thereof
- C10M2207/12—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms
-
- 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
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/10—Carboxylix acids; Neutral salts thereof
- C10M2207/12—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms
- C10M2207/121—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of seven or less carbon atoms
-
- 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
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/10—Carboxylix acids; Neutral salts thereof
- C10M2207/12—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms
- C10M2207/125—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of eight up to twenty-nine carbon atoms, i.e. fatty acids
-
- 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
- C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant compositions
- C10M2215/02—Amines, e.g. polyalkylene polyamines; Quaternary amines
- C10M2215/04—Amines, e.g. polyalkylene polyamines; Quaternary amines having amino groups bound to acyclic or cycloaliphatic carbon atoms
- C10M2215/042—Amines, e.g. polyalkylene polyamines; Quaternary amines having amino groups bound to acyclic or cycloaliphatic carbon atoms containing hydroxy groups; Alkoxylated derivatives thereof
Landscapes
- Chemical & Material Sciences (AREA)
- 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)
- Fats And Perfumes (AREA)
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
- Extraction Or Liquid Replacement (AREA)
Description
PROCESS FOR THE PURIFICATION OF SPENT PROCESS OIL
The present invention relates to a process for the purifica- tion of spent process oils, i.e. process oils contaminated with solid or dissolved impurities, which have been accumu- lated in the oil. The present invention further relates to the use of various substances for the purification of spent process oil.
All patent citations are expressly incorporated by reference in their entirety.
There are different kinds of process oils used within for instance the steel industry. When used as lubricating agents they become contaminated by impurities, which accumulate in the oil. So far no industrially useful process is available for the purification of these oils. :
The term process oil as used herein and in the claims gener- ally relates to oil used in various industrial processes.
Non-limiting examples of process oils are rolling oil, honing 0il, engine lubricating oil, mineral oil, paraffin oil, and paraffin oil containing chlorine. A common method for the destruction of process oils is destruction by burning but such destruction causes environmental problems; this is par- ticularly true for chlorine-containing oils of the type chloroparaffinic oils.
At present many processes within the steel industry do not have environmentally friendly alternatives to chloroparaf-
finic oils for efficient lubrication at high load (heavy duty operations).
Previously it is known that oils (based on vegetable or min- eral oil) may be purified from contaminants with phase chemi- cal methods based on organic polymers and/or polymer mixtures comprising a charged control polymer (W095/14752). The main disadvantage of this process according to the prior art is due to the fact that the distribution between the target fluid and the separation additive mainly occurs between the target fluid and the surface between the target fluid and the separation additive. The background for this is the chemical interactions at the surface and that the density difference between the polymer/polymer mixtures and the target fluid is considerable.
Further there is an earlier described process for the separa- tion of particular impurities in mineral oils based on floc- culation with dicarboxylic acids dissolved in a suitable or- ganic solvent (SE464306).
Accordingly there is a continuous need for a process by means of which contaminated process oils in general and environmen-— tally non-friendly contaminated process olls such as chloroparaffinic oils, in particular, can be purified to such an extent as to enable the recycling thereof.
Separation with several phases involved may be employed for applications where solid dispersed impurities or dissolved : substances can not be separated from a fluid with other con- ventional techniques such as filtration or centrifugal sepa- ration. Such separations are in general based on surface- chemical phenomena and comprise choosing a suitable separa-
tion additive. Said separation additive is under given condi- tions substantially insoluble in the fluid to be purified.
The aim of the chemical separation process is to separate the target fluid to be processed from at least one impurity.
The process is called a chemical phase separation when a sub- stance in the fluid to be purified, depending on its interac- ions with the surrounding molecules migrates to the separa- tion additive. Chemical phase separation may constitute steps comprising more than two phases. This may be accomplished for instance by using several different separation media, which are not miscible.
Chemical phase separation for the purification of chloropar- affinic oils has not been reported earlier in literature.
This is in particular true for chloroparaffinic oils used at "heavy duty operations" within steel industry and other manu- facturing processes regarding machining of steel and iron and with the type of impuritics (lubricants and particular impu- rities) that are thereby accumulated in the oil.
Methods to improve the separation of impurities consisting of particular and/or dissolved inorganic or organic agents from process oils of the type rolling oil or engine lubricating 0il using phase chemical methods have also not been described previously.
The present invention solves the problems of unnecessary de- struction of contaminated process oils by admitting recycling of contaminated process oils after purification, which can not be achieved by any known technology.
—-4~
According to the invention there is provided a process which solves the problem to purify process oils from solid and dis- solved impurities by means of a combined surface chemical and mechanical separation process. The process according to the invention for the purification of contaminated process oil thus comprises in a first step the addition toc the contami- nated oil to be purified of a specific separation additive, which by chemical interactions absorbs contaminating solid, or dissolved impurities in the process oil, and in a second step, separation of said separation additive and absorbed impurities using a method selected from the group consisting of static settling, centrifugal separation, vacuum filtra- tion, press filtration, pre-coat filtration and centrifugal filtration.
According to one aspect of the present invention there is provided a process for the purification of spent process oil, which process comprises, mixing the process oil with an additive comprising a liquid mixture of a) at least one alkanolamine, and b) at least one member selected from the group consisting of alkanoic acids, and alkenoic acids having from 6 to 18 carbon atoms and the melting point/points such that the mix- ture of a) and b) is liquid at the tempera- ture at which the process is carried out, with a pH-value of said mixture of a) and b) in the range of 5 to 8, preferably 6 to 7, and most prefera-
ply 6.3, and said mixture being substantially insolu- ple in the process oil, forming a two phase mixture upon mixing, and subsequent separation of the phase with process oil from the phase with said mixture of a) and b) with absorbed contaminants.
Different preferred embodiments of the present invention are -0 defined .in the dependent claims. In another aspect the pre- sent invention thus comprises a process, wherein a) is se- lected from the group consisting of mono-, di-, and trietha- nolamine.
In a further aspect the present invention comprises a proc- ess, wherein a) is triethanolamine.
In another aspect the present invention comprises a process, wherein b) is selected from the group consisting of lauric acid, oleic acid, pentadecanoic acid, decenoic acid, 2- ethylhexanoic acid, and caprylic acid.
In another aspect the present invention comprises a process, wherein b) is selected from the group consisting of 2- ethylhexanoic acid and caprylic acid.
In another aspect the present invention comprises a process, wherein the said separation of the two phases is carried out by one method or a combination of methods selected from the group consisting of static settling, centrifugal separation, vacuum filtration, press filtration, pre-coat filtration and centrifugal filtration.
In another aspect the present invention comprises a process, wherein the mixture of a) and b) is added in an amount of 0.0001 to 10% by weight, calculated on the weight of the spent process oil. :
In another aspect the present invention comprises a process, wherein said additive in addition to components a) and b) further comprises c} at least one agent selected from the group consisting of monoethylene glycol, dipropylene mono- ethylether, glycerol, and propylene glycol.
In another aspect the present invention comprises a process, which is carried out at a temperature above 10°C and prefera- bly at ambient temperature.
In still another aspect the present invention comprises use of at least one member selected from the group consisting of alkanoic acids, and alkenoic acids having from 6 to 18 carbon atoms in the preparation of a mixture for the purification of spent process oil.
In yet another aspect the present invention comprises use of at least one alkanolamine in the preparation of a mixture for the purification of spent process oil.
In another aspect the present invention comprises use of a liquid mixture of a) at least one alkanolamine, and b) at least one member selected from the group consisting of alkanoic acids, and alkenoic acids having from 6 to 18 carbon atoms and the melting point/points such that the mix-
i ture of a) and b) is liquid at the tempera- ture at which the process is carried out, for the purification of spent process oil.
In yet another aspect the present invention comprises a use where the spent process oil 1s selected from the group con- sisting of mineral oil, rolling oil, honing oil, drawing oil, engine lubricating oil.
In another aspect the present invention comprises a use where the temperature is above 10°C and preferably ambient tempera- ture.
In the first process step a separation additive is mixed with the target fluid under vigorous stirring. The separation ad- ditive is not soluble in the target fluid because of its po- lar properties and thus colloids consisting of small droplets of separation additive arc formed under the stirring, which through the chemical interactions (hydrophilic, hydrophobic, and charge interactions) may absorb the unwanted solid or the dissolved impurities in the target fluid. Because the separa- tion additive has a higher density than most mineral oils (except chloroparaffinic oils and certain other derivatised oils) the separation additive will at a gravity separation form a lower phase together with the solid or dissolved impu- rities and in the cases were the separation additive has a lower density than the target fluid, it will form a lighter phase.
The mixture to be added to the oil to be purified is called the separation additive. A fatty acid with added alkanolamine is preferably used as a separation additive. The separation additive may be in liquid form at room temperature. Fatty acids of animal as well as vegetable origin are suitable can- didates. The fatty acid is at least one selected from the group consisting of alkanoic acids and alkenoic acids having a melting point so that the mixture is liquid at the tempera- ture at which the process is carried out. The temperature at which the process is carried out is generally above 10°C and preferably at ambient temperature. The process temperature is preferably below the boiling point of the separation additive and the oil to be purified and any other component of the mixture. Preferably the separation additive is liquid at room temperature.
Suitable fatty acids are at least one selected from the group consisting of lauric acid, oleic acid, pentadecanoic acid, decenoic acid, 2-ethylhexanoic acid, and caprylic acid. Pre- ferred fatty acids are 2-ethylhexanoic acid and caprylic acid, with the latter one being particularly preferred.
To the fatty acid or the fatty acids at least one alkanola- mine is added, so that the pH value of the liquid mixture is in the range of 5 to 8, preferably 6 to 7, with 6.3 as a par- ticularly preferred value. With a pH range of for instance 6 to 7 the inventor means all pH value within this range such as 6.0, 6.1, 6.2, 6.3, 6.4, 6.5, 6.6, 6.7, 6.8, 6.9, and 7.0.
A person skilled in the art realizes that also other pH val- ues, although not optimal, outside the interval 6 to 7 may be used, such as 5.9, 5,8, 5.7, 5.6, 5.5, 5.4, 5.3, 5.2, 5.1, 5.0 and so on, or 7.1, 7.2, 7.3, 7.4, 7.5, 7.6, 7.7, 7.8, 7.9, 8.0 and so on.
For the pH adjusting process at least one alkanolamine se- lected from the group consisting of mono-, di-, and trietha-
nolamine is used. Monoethanolamine and triethanolamine are preferred. Triethanolamine is particularly preferred.
The properties of the mixture of at least one fatty acid and at least one alkanolamine should be such that the mixture is substantially insoluble in the oil to be purified.
The mixture to be added to the process oil may further com- prise at least one substance selected from the group consist- 19 ing of moncethylene glycol, dipropylene glycol monoethyl ether, propylene glycol and glycerol.
The separation additive comprising the liquid mixture de-~ scribed above is added to the oil to be purified in an amount from 0.0001 to 10% by weight of the oil to be purified. For chloroparaffinic oils with a high amount of solids the puri- fication mixture is for instance added in an amount of about 3% to about 5% or even up to 10% by weight of the oil to be purified. Whercas for the continuous purification of rolling and honing oil for instance only about 0.0001 to 0.0002% by weight of the oil to be purified is required. For other ap- plications any amounts between these extremes are used.
The separation additive is separated from the oil to be puri- fied with one method or a combination of methods selected from the group consisting of static settling, centrifugal separation, vacuum filtration, press filtration, pre-coat filtration and centrifugal filtration.
The following examples serve the purpose to further illus- trate the invention and are not intended to be limiting in any way.
Exampla 1: Purification of solid and dissolved impurities in rolling oils. 3 m® rolling oil (valsolja-20, Statoil) which has been used during a normal cycle (12 weeks) without any kind of purifi- cation and which thus would be destroyed, was pumped to a pilot plant built for this purpose. The plant consisted of a storage tank with a volume of 3 m3 to which a centrifugal separator was connected (MAB 309 Alfa Laval) equipped as a purifier. The rolling oil was mainly contaminated with par- ticular carbon particles (90% with a particle diameter less than 2 pm) and dissolved metal stearates, which are lubri- cants from earlier process steps. The centrifugal separator, which was connected for by-pass purification was of the type “solid wall machine”, which is a separator only intended to continuously separate two non-miscible fluid phases from each other.
When the experiment was started a liquid wall was filled in the centrifugal separator, comprising the scparation addi- tive. Then the corresponding separation additive was mixed _ into the feed to the separator prior to a static mixer. The dosing was approximately 0.1%, The separation additive con- sisted of caprylic acid with added triethanolamine with a resulting pH value of 6.3. 70% by weight of the fatty acid with triethanolamine was mixed with 30% by weight of ethylene glycol to bring down the viscosity of the product prior to dosing. The system was operated with circulation during 6 hours with a flow of 900 1/h. The particle reduction for the rolling oil was measured with a turbidity meter (HACH) by sampling from the separator outlet with and without dosing of product. The reduction of dissolved stearate-socaps was ana- lysed with atom emission analysis.
Results
Table 1
Quantitative FTIR analysis of the additives present in the tested rolling oil. Sample No. 1: untreated rolling oil, rolling oil used for 12 weeks (spent rolling oil), and oil purified according to example 1.
Sample Anti oxidant Ester Lauric acid
Absorbance maxi- | Absorbance maxi- Absorbance maxi-
CT EE em
Teen | oon | vor | 0AeT
Seow motion | won | von | owe]
Purified accor- 0.026 0.013 0.332 [rise EA NA
Table 2 particle reduction over time by means of turbidity measure- ment of a rolling oil subjected to purification according to the invention.
Sample Prior 0il flow | Dosing Turbidity number to/after 1/h rate 1/h (NTU) separator 1 Prior to 1800
BEA EE
2 After separa- 1680 i ll il 3 After separa- 53
I el a a
After separa- a
After separa- 37
I a a a
After separa- 900 29
I i I I
Table 3. Analysis of untreated and treated oil with respect to the presence of trace elements. 5
Trace element Untreated | Treated oil a NEL RL
Sw te oe
Example 2. Purification of honing oil.
Honing oil (Castrol Honilo 971) which has been used in the manufacturing of connecting rods was purified in a bypass process according to the process described above. To a stor- age tank with a volume of 1000 litre a solid wall separator was connected (MAB 204, Alfa Laval) equipped as a purifier. A liquid wall of separation additive was supplied after which the system was by pass purified with a flow of 180 - 240 1li- tres per hour. To the flow of oil to the separator the sepa- ration additive was dosed with a dosing pump (IVAKI) and sub- sequently the oil together with separation additive was passed through a centrifugal pump and a static mixer before the inlet to the separator. The dosing rate was approximately 300 ml/h. The separation additive was based on caprylic acid with added triethanolamine with a resulting pH value of 6.3. 70% by weight of the caprylic acid with triethanolamine was mixed with 30% by weight of ethylene glycol to bring down the viscosity of the product priox to dosing. The particle con- centration in the oil was measured by means of turbidity (HACH) .
Results
The results are shown in table 4.
Table 4 Summary and analysis in example 2.
Sample Prior 0il flow| Dosing [Turbidity number to/after 1/h rate 1/h (NTU) a 1 Prior to 180 798
Ce 2 After 180 240
Te 3 After 180 184 dee
After . 180 0,3 16 .
BEE Ral a 5 After 240 0,3 20 lee LT
After 240 0,2 20
I il 7 After 240 0,1 28 le
After 240 0,1 12
BEA
After 240 0,1 28
Cle ITT
Example 3. Purification of lubricating oil. : 25 litres of marine lubricating oil (Argina x-40) with a duty time of 12 000 hours was purified by separation with a solid wall separator (Emmie, Alfa Laval) equipped as a purifier.
The oil was heavily contaminated with soot particles and in- organic particles. Prior to separation the oil was heated to 959C. The separator was filled with a liquid wall of separa- tion additive and subsequently 250 ml (1% weight/volume) separation additive was mixed into the lubricating oil with a mechanical mixer. The mixture used as separation additive was caprylic acid with added triethanolamine with a pH of 6.3. 13 70% by weight of the caprylic acid with triethanolamine was mixed with 30% by weight of ethylene glycol to bring down the viscosity of the product prior to dosing. The oil was puri- fied by circulation through the separator until no heavy phase could be noted in the heavy phase outlet, thus all fatty acid added to the lubricating oil had been removed. The amount of impurities insoluble in n-pentan was measured in untreated and treated oil. Any influence on the additives in the oil was analysed by comparing IR-spectra for purified oil, unpurified oil and fresh oil.
Results
As can be seen in table 5, the amount of impurities insoluble in n-pentan decreased by 77% when subjecting the oil to ex- traction and separation utilizing the separaticn additive according to the invention.
-~15-
IR-spectra of untreated oil, treated oil and new oil were identical in the wavelength interval 6500 — 3377 cmt. In the wavelength interval 3577 - 3070 cm! a small difference in the spectra can be observed between untreated and treated 0il. This difference is most likely caused by the presence of water in the untreated oil. In the rest of the wavelength interval no major differences in spectra could be noticed. ‘Table 5. Rest amount of impurities insoluble in n-pentan in untreated oil and oil treated according to the invention.
Sample weight Rest weight Rest amount
I i r=
Non-purified 7,8962 0,0232 0,29 i I
Example 4. Purification of chloroparaffinic oil.
Chloroparaffinic oil (Castrol 5051) from a steel industry was purified in laboratory scale. The oil which had been in use for about one year was heavily contaminated with carbon par- ticles, lime fillers, and lubricating fats (approximately 20% impurities by weight). Initially the viscosity was measured for the unpurified oil with a Brookfield viscosimeter. 5% by weight of the separation additive was added to 1 kg of the contaminated oil. The product used was caprylic acid with added monoethanolamine with a resulting pH of 6.3. The mix- ture was allowed to stand in a warm hood in a separation fun- nel at 40°C during 18 hours after which the heavy phase (the chloroparaffinic oil phase) was separated. When the oil had reached room temperature the viscosity was measured. As a comparison the viscosity for pew chloroparaffinic oil was also measured. To study whether any residues of separation additive remained in the oil an IR analysis was conducted where the oil was compared to unpurified oil.
Rasults
Table 6. Viscosity measurement of new, contaminated and treated oil respectively in example 4.
Sample description Viscosity (Cp)
Claims (14)
1. A process for the purification of spent process oil, which process comprises, mixing the process oil with an additive comprising a liquid mixture of a) at least one alkanolamine, and b) at least one member selected from the group con- sisting of alkanoic acids, and alkenoic acids hav- ing from 6 to 18 carbon atoms and the melting . point/points such that the mixture of a) and b) is liquid at the temperature at which the process is carried out, with a pH-value of sald mixture of a) and b) in the range of 5 to 8, preferably 6 to 7, and most pref- erably 6.3, and said mixture being substantially in- soluble in the process oil, forming a two phase mix- ture upon mixing, and subsequent separation of the phase with process oil from the phase with said mixture of a) and b) with absorbed contaminants.
2. A process according to claim 1, wherein a) is selected from the group consisting of mono-, di-, and trietha- nolamine.
3. A process according to claim 1, wherein a) is trietha- nolamine. :
~18-
4. A process according to any of the claims 1 to 3, wherein b) is selected from the group consisting of lauric acid, oleic acid, pentadecanoic acid, decenoic acid, 2- ethylhexanoic acid, and caprylic acid.
5 .
5. A process according to any of the claims 1 to 3, wherein b) is selected from the group consisting of 2- ethylhexanoic acid and caprylic acid.
6. A process according to any of the claims 1 to 5, wherein said separation of the two phases is carried out by one method or a combination of methods selected from the group consisting of static settling, centrifugal separa- tion, vacuum filtration, press filtration, pre-coat fil- tration and centrifugal filtration.
7. A process according to any of the claims 1 to 6, wherein the mixture of a) and b) is added in an amount of 0.0001 to 10% by weight, calculated on the weight of the spent process oil.
8. A process according to any of the claims 1 to 7, wherein said additive in addition to components a) and b) fur- ther comprises c) at least one agent selected from the group consisting of monoethylene glycol, dipropylene monoethylether, glycerol, and propylene glycol.
9. A process according to any of the claims 1 to 8, which is carried out at a temperature above 10°C and prefera- bly at ambient temperature.
10. Use of at least one member selected from the group consisting of alkanoic acids, and alkenoic acids having
_ 1 9 - from 6 to 18 carbon atoms in the preparation of a mix- ture for the purification of spent process oil.
11. Use of at least one alkanolamine in the preparation of a mixture for the purification of spent process oil.
12. Use of a liquid mixture of a) at least one alkanolamine, and b) at least one member selected from the group con- sisting of alkanoic acids, and alkenoic acids hav- ing from 6 to 18 carbon atoms and the melting point/points such that the mixture of a) and b) is liquid at the temperature at which the process is carried out, : for the purification of spent process oil.
13. Use according to any of the claims 10 to 12 where the spent process oil is selected from the group con- sisting of mineral oil, rolling oil, honing oil, drawing oil, engine lubricating oil.
14. Use according to any of the claims 10 to 13 where the temperature is above 10°C and preferably ambient temperature.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE0401291A SE0401291D0 (en) | 2004-05-17 | 2004-05-17 | Process for the purification of spent process oil |
Publications (1)
Publication Number | Publication Date |
---|---|
ZA200609310B true ZA200609310B (en) | 2008-06-25 |
Family
ID=32501929
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ZA200609310A ZA200609310B (en) | 2004-05-17 | 2006-11-08 | Process for the purification of spent process oil |
Country Status (9)
Country | Link |
---|---|
US (1) | US20070241030A1 (en) |
EP (1) | EP1773971A1 (en) |
JP (1) | JP2007538134A (en) |
KR (1) | KR20070015581A (en) |
CN (1) | CN1973022A (en) |
BR (1) | BRPI0510791A (en) |
SE (1) | SE0401291D0 (en) |
WO (1) | WO2005111181A1 (en) |
ZA (1) | ZA200609310B (en) |
Families Citing this family (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE531141C2 (en) * | 2007-05-10 | 2009-01-07 | Alfa Laval Corp Ab | Centrifugal separator with conveyor thread that prevents separated particles from clogging the inside of the rotor |
CN102585989B (en) * | 2011-12-28 | 2013-08-07 | 重庆渝能滤油机制造有限公司 | Waste oil regeneration system |
FR3000498B1 (en) * | 2012-12-27 | 2015-03-13 | Total Raffinage Marketing | COMBUSTIBLE COMPOSITION COMPRISING A HEAVY FUEL AND A PRODUCT FROM THE BIOMASS. |
CN103937530B (en) * | 2013-01-21 | 2016-08-03 | 中国石油化工股份有限公司 | A kind of weight oil treatment process |
US20150265955A1 (en) * | 2014-03-19 | 2015-09-24 | Krishna Kanchi | System and method for recycling used oil |
CN104450147A (en) * | 2014-11-05 | 2015-03-25 | 华文蔚 | Environment-friendly purification method for waste oil of automobile industry |
CN104479736A (en) * | 2014-12-03 | 2015-04-01 | 烟台市牟平区留德润滑油销售有限公司 | Waste lube distillate oil refinement method |
EP3339405A1 (en) | 2016-12-20 | 2018-06-27 | Alfa Laval Corporate AB | Separation of contaminants from a liquid mixture |
SE541119C2 (en) | 2017-04-28 | 2019-04-09 | Recondoil Sweden Ab | Method, system and computer program for purification of oil by reusing a sludge phase |
SE541116C2 (en) | 2017-04-28 | 2019-04-09 | Recondoil Sweden Ab | A system, method and computer program for purification of oil by sedimentation |
WO2018199837A1 (en) | 2017-04-28 | 2018-11-01 | Recondoil Sweden Ab | Purification of oil |
EP3635079B1 (en) * | 2017-06-02 | 2024-04-17 | Hindustan Petroleum Corporation Limited | A formulation for enhancing lubricity of fuels |
CN107400555A (en) * | 2017-07-21 | 2017-11-28 | 浙江师范大学 | A kind of method using discarded machine oil production cutting oil and releasing agent |
SE543443C2 (en) | 2019-02-08 | 2021-02-16 | Skf Recondoil Ab | Purification of oil |
CN110747050B (en) * | 2019-11-06 | 2022-02-11 | 沈阳理工大学 | Pickling agent for regenerating waste engine oil and pickling treatment method |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2435707A (en) * | 1941-05-31 | 1948-02-10 | Ulric B Bray | Method of and apparatus for treating oil |
US4094770A (en) * | 1977-06-22 | 1978-06-13 | Chevron Research Company | Process for removing unfilterable solids from an oil |
US4432865A (en) * | 1982-01-25 | 1984-02-21 | Norman George R | Process for treating used motor oil and synthetic crude oil |
JPH02504523A (en) * | 1987-08-19 | 1990-12-20 | エルヴェーエー―エントゾルグング・アクチエンゲゼルシャフト | Waste oil purification and recycling method |
SE512750C2 (en) * | 1993-11-29 | 2000-05-08 | Alfa Laval Separation Ab | Method of gravimetric separation of oil contaminated with particles and or water |
US6395166B1 (en) * | 2000-08-30 | 2002-05-28 | Frederick J. Haydock | Method of reclaiming used motor oil for further use |
SE524469C2 (en) * | 2002-12-12 | 2004-08-10 | Alfa Laval Corp Ab | When cleaning oil from polluting particles, put in a centrifugal separator |
-
2004
- 2004-05-17 SE SE0401291A patent/SE0401291D0/en unknown
-
2005
- 2005-05-16 EP EP05744662A patent/EP1773971A1/en not_active Withdrawn
- 2005-05-16 JP JP2007527108A patent/JP2007538134A/en active Pending
- 2005-05-16 WO PCT/SE2005/000701 patent/WO2005111181A1/en active Application Filing
- 2005-05-16 BR BRPI0510791-1A patent/BRPI0510791A/en not_active Application Discontinuation
- 2005-05-16 KR KR1020067024035A patent/KR20070015581A/en not_active Application Discontinuation
- 2005-05-16 CN CNA2005800160052A patent/CN1973022A/en active Pending
- 2005-05-16 US US11/596,736 patent/US20070241030A1/en not_active Abandoned
-
2006
- 2006-11-08 ZA ZA200609310A patent/ZA200609310B/en unknown
Also Published As
Publication number | Publication date |
---|---|
JP2007538134A (en) | 2007-12-27 |
US20070241030A1 (en) | 2007-10-18 |
BRPI0510791A (en) | 2007-11-20 |
KR20070015581A (en) | 2007-02-05 |
WO2005111181A1 (en) | 2005-11-24 |
EP1773971A1 (en) | 2007-04-18 |
CN1973022A (en) | 2007-05-30 |
SE0401291D0 (en) | 2004-05-17 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
ZA200609310B (en) | Process for the purification of spent process oil | |
US11052372B1 (en) | Method of manufacturing bio-diesel reactor | |
CN101486515B (en) | Oily wastewater treatment method and whole set apparatus thereof | |
CN101029251A (en) | Biodiesel cold filtration process | |
US20200056102A1 (en) | Purification of oil | |
CN105324472A (en) | Process and apparatus for purifying a fatty mixture and related products including fuels | |
CN108659945A (en) | A kind of Magnetic filter formula impurity treatment method of cold mill complex emulsion | |
CN107779301B (en) | Aerospace precision industrial cleaning agent | |
US4383933A (en) | Organo titanium complexes | |
EP0291174B1 (en) | Process for treatment of contaminated emulsion | |
US20220111317A1 (en) | A method and system for circular use of industrial oil | |
WO2002018523A9 (en) | A method of reclaiming used motor oil for further use | |
US5554298A (en) | Steel mill flume water treatment | |
EP2691196B1 (en) | Methods for die casting metals using phase separable fluids | |
CN209178139U (en) | Semi-coke high concentrated organic wastewater pretreatment unit | |
US9512369B1 (en) | Process for removing color bodies from used oil | |
RU2721518C1 (en) | Mobile unit for processing emulsion intermediate layers of well products | |
US8562816B1 (en) | Tank cleaning system and apparatus | |
Rahmi | Determination of Oil and Fat Levels in Liquid Waste of Palm Oil Industry in Muaro Jambi District | |
RU2156275C2 (en) | Method of processing and reusing petroleum-containing sludges | |
US5876608A (en) | Purification method | |
Mammadova | IMPROVEMENT OF THE PROCESS OIL CONTAINING WASTE WATERS | |
RU2333933C2 (en) | Method of utilisation of waste motor oil and device for to this effect | |
Jibril et al. | Analysis of Acid Options in the Purification of Spent Motor Engine Oil using Acidified Clay | |
SU1171426A1 (en) | Method of purifying oil-emulsion waste water |