DE1028270B - Process for cleaning used whale oil - Google Patents
Process for cleaning used whale oilInfo
- Publication number
- DE1028270B DE1028270B DEA24018A DEA0024018A DE1028270B DE 1028270 B DE1028270 B DE 1028270B DE A24018 A DEA24018 A DE A24018A DE A0024018 A DEA0024018 A DE A0024018A DE 1028270 B DE1028270 B DE 1028270B
- Authority
- DE
- Germany
- Prior art keywords
- oil
- acid
- rolling
- cleaning used
- abrasion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims description 12
- 238000004140 cleaning Methods 0.000 title claims description 8
- 239000010698 whale oil Substances 0.000 title 1
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims description 21
- 239000010731 rolling oil Substances 0.000 claims description 10
- BDAGIHXWWSANSR-UHFFFAOYSA-N methanoic acid Natural products OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 235000011054 acetic acid Nutrition 0.000 claims description 7
- 238000005299 abrasion Methods 0.000 claims description 6
- OSWFIVFLDKOXQC-UHFFFAOYSA-N 4-(3-methoxyphenyl)aniline Chemical compound COC1=CC=CC(C=2C=CC(N)=CC=2)=C1 OSWFIVFLDKOXQC-UHFFFAOYSA-N 0.000 claims description 4
- 239000002253 acid Substances 0.000 claims description 4
- XBDQKXXYIPTUBI-UHFFFAOYSA-N dimethylselenoniopropionate Natural products CCC(O)=O XBDQKXXYIPTUBI-UHFFFAOYSA-N 0.000 claims description 4
- 235000019253 formic acid Nutrition 0.000 claims description 4
- 238000005406 washing Methods 0.000 claims description 4
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 238000005189 flocculation Methods 0.000 claims description 2
- 230000016615 flocculation Effects 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 claims description 2
- 235000019260 propionic acid Nutrition 0.000 claims description 2
- IUVKMZGDUIUOCP-BTNSXGMBSA-N quinbolone Chemical compound O([C@H]1CC[C@H]2[C@H]3[C@@H]([C@]4(C=CC(=O)C=C4CC3)C)CC[C@@]21C)C1=CCCC1 IUVKMZGDUIUOCP-BTNSXGMBSA-N 0.000 claims description 2
- 150000007514 bases Chemical class 0.000 claims 1
- 150000003839 salts Chemical class 0.000 claims 1
- 239000003921 oil Substances 0.000 description 16
- 229910052751 metal Inorganic materials 0.000 description 8
- 239000002184 metal Substances 0.000 description 8
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 4
- 238000005096 rolling process Methods 0.000 description 4
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 3
- 239000008394 flocculating agent Substances 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 239000010687 lubricating oil Substances 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 238000006386 neutralization reaction Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 235000011121 sodium hydroxide Nutrition 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- WRIDQFICGBMAFQ-UHFFFAOYSA-N (E)-8-Octadecenoic acid Natural products CCCCCCCCCC=CCCCCCCC(O)=O WRIDQFICGBMAFQ-UHFFFAOYSA-N 0.000 description 1
- LQJBNNIYVWPHFW-UHFFFAOYSA-N 20:1omega9c fatty acid Natural products CCCCCCCCCCC=CCCCCCCCC(O)=O LQJBNNIYVWPHFW-UHFFFAOYSA-N 0.000 description 1
- QSBYPNXLFMSGKH-UHFFFAOYSA-N 9-Heptadecensaeure Natural products CCCCCCCC=CCCCCCCCC(O)=O QSBYPNXLFMSGKH-UHFFFAOYSA-N 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 206010062717 Increased upper airway secretion Diseases 0.000 description 1
- 239000005642 Oleic acid Substances 0.000 description 1
- ZQPPMHVWECSIRJ-UHFFFAOYSA-N Oleic acid Natural products CCCCCCCCC=CCCCCCCCC(O)=O ZQPPMHVWECSIRJ-UHFFFAOYSA-N 0.000 description 1
- -1 Phenyl alcohol amines Chemical class 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 238000010306 acid treatment Methods 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 238000001311 chemical methods and process Methods 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 235000014113 dietary fatty acids Nutrition 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000000975 dye Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 229930195729 fatty acid Natural products 0.000 description 1
- 239000000194 fatty acid Substances 0.000 description 1
- 150000004665 fatty acids Chemical class 0.000 description 1
- 235000021588 free fatty acids Nutrition 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 125000005456 glyceride group Chemical group 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- QXJSBBXBKPUZAA-UHFFFAOYSA-N isooleic acid Natural products CCCCCCCC=CCCCCCCCCC(O)=O QXJSBBXBKPUZAA-UHFFFAOYSA-N 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 239000002480 mineral oil Substances 0.000 description 1
- 235000010446 mineral oil Nutrition 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000003472 neutralizing effect Effects 0.000 description 1
- ZQPPMHVWECSIRJ-KTKRTIGZSA-N oleic acid Chemical compound CCCCCCCC\C=C/CCCCCCCC(O)=O ZQPPMHVWECSIRJ-KTKRTIGZSA-N 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 208000026435 phlegm Diseases 0.000 description 1
- 235000019353 potassium silicate Nutrition 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000007127 saponification reaction Methods 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 239000000344 soap Substances 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
- 239000004071 soot Substances 0.000 description 1
- 235000019871 vegetable fat Nutrition 0.000 description 1
- 239000000080 wetting agent Substances 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
- C10M175/04—Working-up used lubricants to recover useful products ; Cleaning aqueous emulsion based
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Description
Zierfahren zur Reinigung gebrauchter Walzöle Das Verfahren betrifft die Reinigung von Walzölen, die durch den Walzvorgang mit Abrieb von den Walzen und vom Walzgut verunreinigt sind. Insbesondere bezieht es sich auf Walzöle, die zur Bearbeitung von Leichtmetallen und ihren Legierungen gedient haben.Ornamental process for cleaning used rolling oils The process concerns the cleaning of rolling oils caused by the rolling process with abrasion from the rollers and are contaminated by the rolling stock. In particular, it relates to rolling oils that for processing light metals and their alloys.
Die Untersuchung zeigt, daß die metallischen Verunreinigungen im Öl zum großen Teil kolloidal dispergiert sind. Ihre Abmessungen sind etwa von der Größenordnung 0,02 bis 10 Mikron und mehr. Infolge der hohen Dispersität des Abriebs der Leichtmetalle wird er von den in der Mineralölindustrie üblicherweise benutzten Filtern (Spaltfilter) nicht zurückgehalten. Anschwemmfilter haben wohl eine qualitativ etwas bessere Wirkung, aber ihre Mengenleistung ist für wirtschaftliche Ausnutzung untragbar, und die Ölverluste sind zu groß.The investigation shows that the metallic impurities in the oil are largely colloidally dispersed. Their dimensions are roughly on the order of magnitude 0.02 to 10 microns and more. As a result of the high dispersity of the abrasion of light metals it is removed from the filters commonly used in the mineral oil industry (slotted filters) not held back. Precoat filters probably have a slightly better quality effect, but their quantitative output is unsustainable for economic exploitation, and the oil losses are too big.
Das in der Leichtmetallwalzerei am meisten benutzte Reinigungsverfahren bestand in einer Behandlung der Öle mit Schwefelsäure bei etwa 80° C. Dabei wurden die Druckmittel, vor allem auch die vielfach benutzte Ölsäure und die Glyceride, weitgehend zerstört und die Leichtmetallteile aufgelöst. Durch gründliches mehrmaliges Waschen mit Wasser gelang es, das regenerierte Öl in säure- und salzfreien Zustand zu bringen. Die Verluste waren sehr hoch. Die Ausbeute an gereinigtem Walzöl lag zwischen 50 und 701/o.The most widely used cleaning method in light metal rolling consisted in a treatment of the oils with sulfuric acid at about 80 ° C the pressure media, especially the widely used oleic acid and glycerides, largely destroyed and the light metal parts dissolved. By thorough several times Washing with water succeeded in keeping the regenerated oil in an acid and salt-free state bring to. The losses were very high. The yield of purified rolling oil was between 50 and 701 / o.
Es ist ein an sich bekanntes Verfahren, Verunreinigungen aus Schmierölen dadurch zu entfernen, daß man in diesen die in ihnen dispergierten Polymerisations- und Oxydationsprodukte und Harze (gums) durch Zusätze wie z. B. Phenylalkoholamine oder Wasserglas ausflockt; die ausgeflockten Bestandteile umhüllen die festen Verunreinigungen wie Staub, Ruß, Kohleteilchen, Metallabrieb und sinken mit ihnen zu Boden. Auch Netzmittel von ester- oder salzartigem Charakter, die man in dem zu reinigenden Schmieröl selbst aus mehreren Komponenten erzeugt, bewirken Ausflockung der dispergierten Verunreinigungen. Setzt man gebrauchtem Schmieröl zunächst 4% Fettsäure zu und danach die zur Verseifung erforderliche Menge Natronlauge, so bildet sich die betreffende Seife, die im Öl unlöslich ist und beim Ausflocken die Reinigung von den Umsetzungsprodukten und festen Teilchen besorgt.It is a known process to remove contaminants from lubricating oils to remove by the fact that in these the polymerisation- and oxidation products and resins (gums) by additives such as. B. Phenyl alcohol amines or waterglass flocculates; the flocculated constituents envelop the solid impurities like dust, soot, coal particles, metal debris and sink with them to the ground. Even Wetting agents of ester or salt-like character, which one in the to be cleaned Lubricating oil itself produced from several components, cause flocculation of the dispersed Impurities. If you add 4% fatty acid to used lubricating oil and then add it the amount of caustic soda required for the saponification is formed Soap that is insoluble in the oil and, when flocculated, cleans the reaction products and solid particles concerned.
Auch tierische und pflanzliche Fette können auf ähnliche Weise durch Zusatz von Natronlauge und Zitronensäure von freien Fettsäuren, Farbstoffen, Harzen, Schleim und Phosphatiden befreit werden.Animal and vegetable fats can also do this in a similar way Addition of caustic soda and citric acid from free fatty acids, dyes, resins, Phlegm and phosphatides are freed.
In allen diesen Verfahren wird der etwa vorhandene Metallabrieb selbst nicht geflockt, sondern nur durch den im Öl durch die Zusätze entstehenden unlöslichen, in Flocken ausfallenden Anteil umhüllt, adsorbiert und mit ihm durch Zentrifugieren, Sedimentieren oder Filtrieren abgetrennt.In all of these processes, any existing metal abrasion is itself not flocculated, but only through the insoluble, coated in flakes, adsorbed and centrifuged with it, Separated sedimentation or filtration.
Es war aber nicht bekannt, daß der Metallabrieb selbst durch eine geeignete Behandlung aus dem nichtfiltrierbaren kolloidaldispersen Zustand in den filtrierbaren grobdispers geflockten, mechanisch abtrennbaren übergeführt werden kann. Der Metallabrieb wird hierbei selbst geflockt und kann dann mechanisch beseitigt werden. Dies gelingt durch Zusatz von 1 bis 10 Gewichtsprozent Essigsäure, Ameisensäure oder Propionsäure der Konzentration von vorzugsweise 50 bis 1000/0, insbesondere 100°/o. Die Gewichtsprozente des Zusatzes sind von der Menge des zu reinigenden Walzöles zu rechnen.However, it was not known that the metal abrasion itself was caused by a appropriate treatment from the non-filterable colloidal disperse state to the filterable, coarsely flocculated, mechanically separable are transferred can. The metal abrasion itself is flocculated and can then be removed mechanically will. This is achieved by adding 1 to 10 percent by weight of acetic acid and formic acid or propionic acid of the concentration of preferably 50 to 1000/0, in particular 100% The weight percent of the additive depends on the amount to be cleaned Rolling oil to be expected.
Das Verfahren sei an einem Beispiel erklärt: Ein Walzöl mit einem Gehalt von z. B. 0,311/o Aluminium ist von grauschwarzer Farbe und läuft durch normale Papier- oder Stoff-Filter trüb grauschwarz hindurch. 100 1 solchen Öles werden erwärmt z. B. auf 40 bis 60° C und mit 411/o konzentrierter Essigsäure versetzt. Nach etwa 3 Minuten kann durch Ablaufenlassen einer Ölprobe auf einer schräg gehaltenen Glasplatte die Bildung von feinen bis groben Gerinnseln und Flocken festgestellt werden. Gießt man das Öl jetzt auf Papier-oder Stoff-Filter der obengenannten Art, so fließt es vollkommen klar hindurch, und die Filtrationsgeschwindigkeit ist etwa 10mal so groß als die des ungereinigten Öles im gleichen Filter. Das Öl muß von der zugesetzten Säure befreit werden. Das kann auf verschiedene Weise geschehen, entweder durch mehrmalige Wasserwäsche im Spitzbottich, in welchem es mit Wasser besprinkelt wird, wobei das Wasser in Tropfenform durch das Öl hindurchsinkt und sich im Trichterteil getrennt sammelt und abgelassen werden kann.The procedure is explained using an example: A rolling oil with a Salary of z. B. 0.311 / o aluminum is gray-black in color and runs through normal Paper or fabric filter through cloudy gray-black. 100 liters of such oil are heated z. B. to 40 to 60 ° C and mixed with 411 / o concentrated acetic acid. After about 3 minutes by letting an oil sample run off on a glass plate held at an angle the formation of fine to coarse clots and flakes can be observed. Pours If you put the oil on a paper or cloth filter of the type mentioned above, it will flow perfectly clear through, and the rate of filtration is about 10 times as fast than that of the unrefined oil in the same filter. The oil must be from the added one Acid to be freed. This can be done in a number of ways, either through repeated water washing in the pointed tub, in which it is sprinkled with water, whereby the water sinks through the oil in the form of drops and settles in the funnel part collects and can be drained separately.
Statt der Wasserwäsche sind auch andere Reinigungsverfahren möglich, wie z. B. Austreiben der Essigsäure durch Erhitzen ohne oder mit Anwendung von Vakuum. Auch durch Zusatz von chemischen Neutralisierungsstoffen wie etwa gekörntem kohlensaurem Kalk kann die Essigsäure gebunden und danach beseitigt werden. Als besonders vorteilhaft hat sich die Neutralisierung mit gasförmigem Ammoniak erwiesen, weil auf diese Weise kein Wasser in das Öl eingebracht wird und die üblicherweise auftretende unangenehme Emulsionsbildung unterbleibt.Instead of water washing, other cleaning methods are also possible, such as B. Expelling the Acetic acid by heating with or without Application of vacuum. Also by adding chemical neutralizing substances such as Grained carbonate of lime, for example, can bind the acetic acid and then remove it will. Neutralization with gaseous ammonia has proven to be particularly advantageous proven because in this way no water is introduced into the oil and that is usually the case unpleasant emulsion formation that occurs does not occur.
Das Verfahren hat gegenüber dem durch Schwefelsäurebehandlung den Vorteil, daß das Öl selbst durch die Essigsäure oder die Ameisensäure nicht angegriffen wird, daß die Reinigung auf mechanischem Wege erfolgt und kontinuierlich leicht durchzuführen ist, während rein chemische Verfahren schwieriger kontinuierlich anwendbar sind. Die verwendeten Flokkungsmittel sind unschädlich für das Öl, die Reinigungseinrichtungen und das Bedienungspersonal.The process has the opposite of the sulfuric acid treatment The advantage is that the oil itself is not attacked by acetic acid or formic acid that the cleaning is done mechanically and continuously easily is to be carried out, while purely chemical processes are more difficult to apply continuously are. The flocculants used are harmless to the oil and the cleaning equipment and the operator.
Etwa zurückbleibende geringe Reste der Flockungsmittel sind für die Wiederverwendung des gereinigten Öles unbedenklich, sie schaden weder dem Walzgut noch den Walzen und Ständern.Any remaining small residues of the flocculants are for the Reuse of the cleaned oil is harmless, it does not damage the rolling stock nor the rollers and stands.
Da die Flockungsmittel wie Essigsäure und Ameisensäure in hochverdünnter Form vollkommen harmlos sind, ist ihre Beseitigung durch Zufuhr in die Flutungswasser nach der erforderlichen Neutralisierung mit keinerlei Gefahren verbunden. Die Ausbeute an gereinigtem Walzöl liegt wesentlich höher als bei den bisherigen Verfahren, nämlich bei 90% und mehr des unreinen Öles, je nach dessen Zusammensetzung und Verunreinigungsgrad.Because the flocculants such as acetic acid and formic acid are in highly diluted Form are completely harmless, they can be eliminated by adding them to the flood water associated with no dangers after the necessary neutralization. The yield of purified rolling oil is significantly higher than in the previous process, namely at 90% and more of the impure oil, depending on its composition and degree of contamination.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEA24018A DE1028270B (en) | 1955-12-27 | 1955-12-27 | Process for cleaning used whale oil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEA24018A DE1028270B (en) | 1955-12-27 | 1955-12-27 | Process for cleaning used whale oil |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE1028270B true DE1028270B (en) | 1958-04-17 |
Family
ID=6925576
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DEA24018A Pending DE1028270B (en) | 1955-12-27 | 1955-12-27 | Process for cleaning used whale oil |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE1028270B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0147541A2 (en) * | 1983-12-08 | 1985-07-10 | MANNESMANN Aktiengesellschaft | Process and apparatus for the purification of circulating liquids |
| EP0540825A1 (en) * | 1991-11-08 | 1993-05-12 | J.R. SCHNEIDER, Co., Inc. | Filter aid and method for using same for reclaiming oil coolants use for metal working |
| WO2001066678A1 (en) * | 2000-03-09 | 2001-09-13 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Method for recovering a spent cutting suspension |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR555691A (en) * | 1921-09-24 | 1923-07-04 | Thomson Houston Comp Francaise | Oil purification process |
| FR752647A (en) * | 1932-06-23 | 1933-09-27 | Naphte S A Soc Du | Purification process for used or other lubricating oils |
| US2568583A (en) * | 1949-06-18 | 1951-09-18 | Dow Chemical Co | Method of separating impurities from used lubricating oils |
| FR1000574A (en) * | 1946-03-05 | 1952-02-13 | Ile D Etude Des Brevets Hycar | Process for the regeneration of hydrocarbon lubricating oils |
| FR1057948A (en) * | 1951-03-29 | 1954-03-11 | Sharples Corp | Oil refining improvements |
-
1955
- 1955-12-27 DE DEA24018A patent/DE1028270B/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR555691A (en) * | 1921-09-24 | 1923-07-04 | Thomson Houston Comp Francaise | Oil purification process |
| FR752647A (en) * | 1932-06-23 | 1933-09-27 | Naphte S A Soc Du | Purification process for used or other lubricating oils |
| FR1000574A (en) * | 1946-03-05 | 1952-02-13 | Ile D Etude Des Brevets Hycar | Process for the regeneration of hydrocarbon lubricating oils |
| US2568583A (en) * | 1949-06-18 | 1951-09-18 | Dow Chemical Co | Method of separating impurities from used lubricating oils |
| FR1057948A (en) * | 1951-03-29 | 1954-03-11 | Sharples Corp | Oil refining improvements |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0147541A2 (en) * | 1983-12-08 | 1985-07-10 | MANNESMANN Aktiengesellschaft | Process and apparatus for the purification of circulating liquids |
| DE3344404A1 (en) * | 1983-12-08 | 1985-07-18 | Mannesmann AG, 4000 Düsseldorf | METHOD AND DEVICE FOR CLEANING CIRCUIT LIQUIDS |
| EP0147541A3 (en) * | 1983-12-08 | 1986-10-15 | MANNESMANN Aktiengesellschaft | Process and apparatus for the purification of circulating liquids |
| EP0540825A1 (en) * | 1991-11-08 | 1993-05-12 | J.R. SCHNEIDER, Co., Inc. | Filter aid and method for using same for reclaiming oil coolants use for metal working |
| WO2001066678A1 (en) * | 2000-03-09 | 2001-09-13 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Method for recovering a spent cutting suspension |
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