WO1993013190A1 - Procede d'extraction de polluants a partir d'huile usee - Google Patents

Procede d'extraction de polluants a partir d'huile usee

Info

Publication number
WO1993013190A1
WO1993013190A1 PCT/NL1993/000001 NL9300001W WO9313190A1 WO 1993013190 A1 WO1993013190 A1 WO 1993013190A1 NL 9300001 W NL9300001 W NL 9300001W WO 9313190 A1 WO9313190 A1 WO 9313190A1
Authority
WO
WIPO (PCT)
Prior art keywords
oil
sulphuric acid
demulsifier
mixture
water
Prior art date
Application number
PCT/NL1993/000001
Other languages
English (en)
Inventor
Gijsbertus Cornelis Spruijt
Original Assignee
S & D Oil Technics B.V.
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from NL9200003A external-priority patent/NL9200003A/nl
Application filed by S & D Oil Technics B.V. filed Critical S & D Oil Technics B.V.
Publication of WO1993013190A1 publication Critical patent/WO1993013190A1/fr

Links

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
    • C10M175/0016—Working-up used lubricants to recover useful products ; Cleaning with the use of chemical agents

Definitions

  • the invention relates to a method for removing pollu ⁇ ting constituents from used oil.
  • various pollutants such as heavy metals and water occur in oil, for instance motor oil.
  • the heavy metals come for example from the engine block, from additives or from petrol (such as lead) .
  • a requirement set down in the treatment for instance of used motor oil is that the ash content thereof, that is, the percentage of heavy metals remaining after burning of the oil, must amount to less than 0.25% by weight.
  • the ash content of oil types used at this moment in time varies after use between 0.6 and 1.4% by weight.
  • the above described method has a number of drawbacks.
  • the first of these is the formation of the acid tar.
  • Acid tar is chemical waste and undesirable as such.
  • the forming of acid tar further results in up to 10% loss of oil.
  • the whole procedure is performed in an acid envi ⁇ ronment due to the comparatively high sulphuric acid con ⁇ tent.
  • This acid has inter alia a corrosive effect on the containers in which the procedure is carried out.
  • This is achieved according to the invention by a method comprising the steps of: a) heating the used oil to an increased temperature below 100°C; b) adding water to the oil; c) adding sulphuric acid to the oil; d) thoroughly mixing the oil and sulphuric acid; e) adding a demulsifier to the oil-sulphuric acid mixture; f) thoroughly mixing the oil-sulphuric acid-demul ⁇ sifier mixture; g) allowing the oil-sulphuric acid-demulsifier mixtu ⁇ re to stand to allow forming of a water phase containing the pollutants and a purified oil phase; and h) separating the water phase from the purified oil phase.
  • the temperature to which the oil is heated lies pre ⁇ ferably between 50 and 100°C. A temperature below 50°C is likewise possible but the viscosity of particular oil types is often too high in this temperature range for an optimum removal of pollutants. When the oil is heated above 100°C the water phase will evaporate. Most preferred is a tempera ⁇ ture of approximately 80°C.
  • water is added to the oil.
  • the presence of water is essential for optimal functioning of the method according to the invention because it is therein that the pollutant heavy metals and the like come to lie.
  • the heavy metals present in the oil are dissolved through use of sulphuric acid.
  • the dissolved metals come to lie in the water phase.
  • the quantity of sulphuric acid to be added is subject to the total ash content of the motor oil. It has been found that a sulphuric acid final concentration of between 0.3 and 1% by weight is more than sufficient for effectively removing the heavy metals.
  • the time for which the oil-sulphuric acid mixture is allowed to stand is preferably at least about two hours.
  • SOT-826TM S&D Oil Technics B.V. , Groot-Ammers
  • the separation of the oil-sulphuric acid mixture is prefera- bly performed without the help of any mechanical separation equipment, but instead by gravity settling. In this case the application of SOT-826TM in the oil de-ashing process plays an essential role.
  • the invention involves the formation of water-soluble salts and polar-metal-complexes.
  • the surface-active agents contai ⁇ ned in the demulsifier SOT-826TM as a mixture of non-ionic compounds provide a complete separation of the oil and aqueous phases.
  • the mixing of the oil-sulphuric acid-demulsifier mixture can be carried out in different ways. It is for instance possible to pump the mixture through the container or to stir it or to blow air into the container from below. Mixing preferably takes place for at least about two hours. The time for which the oil-sulphuric acid-demulsifier mixture is allowed to stand is preferably at least about twenty-four hours.
  • the heavier water phase containing the pollutants will sink to the bottom of the container, while the phase with the purified oil will float on top.
  • the oil layer complies with the requirements, that is, has a BS&W (Bottom Sediments & Water) value of less than 1% by volume, either the purified oil can be removed from the top by means of pumping or the underlying water phase can be drained from below.
  • BS&W Bottom Sediments & Water

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)
  • Extraction Or Liquid Replacement (AREA)
  • Fats And Perfumes (AREA)
  • Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)

Abstract

Procédé d'extraction de constituants polluants à partir d'huile usée. Il consiste à chauffer l'huile usée jusqu'à une température inférieure à 100 °C; à ajouter de l'eau à l'huile; à y ajouter de l'acide sulfurique; à mélanger intimement l'huile et l'acide sulfurique; à laisser reposer le mélange d'huile et d'acide sulfurique; à ajouter à ce mélange un agent désémulsionnant; à mélanger intimement le mélange d'huile, d'acide sulfurique et d'agent désémulsionnant; à laisser reposer le mélange d'huile, d'acide sulfurique et d'agent désémulsionnant de manière à permettre la formation d'une phase aqueuse contenant les polluants et d'une phase huileuse purifiée; et à séparer la phase aqueuse de la phase huileuse purifiée. On ajoute l'acide sulfurique à l'huile afin de dissoudre les métaux lourds présents dans celle-ci. Les métaux lourds dissous se rassemblent dans la phase aqueuse, et on provoque une nouvelle formation de composés métalliques hydrosolubles en ajoutant l'agent désémulsionnant, ce qui entraîne la séparation de la phase aqueuse de la couche d'huile. A la suite de ce traitement, l'huile purifiée renferme moins de 0,1 % en poids de métaux lourds et peut donc être brûlée ou réutilisée à des fins de raffinage.
PCT/NL1993/000001 1992-01-03 1993-01-04 Procede d'extraction de polluants a partir d'huile usee WO1993013190A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
NL9200003A NL9200003A (nl) 1992-01-03 1992-01-03 Werkwijze voor het verwijderen van verontreinigingen uit gebruikte olie.
NL9200003 1992-01-03
NL9200209 1992-02-05
NL9200209A NL9200209A (nl) 1992-01-03 1992-02-05 Werkwijze voor het verwijderen van verontreinigingen uit gebruikte olie.

Publications (1)

Publication Number Publication Date
WO1993013190A1 true WO1993013190A1 (fr) 1993-07-08

Family

ID=26646917

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NL1993/000001 WO1993013190A1 (fr) 1992-01-03 1993-01-04 Procede d'extraction de polluants a partir d'huile usee

Country Status (2)

Country Link
AU (1) AU3368693A (fr)
WO (1) WO1993013190A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2393448A (en) * 2002-09-28 2004-03-31 Oss Group Ltd Treatment of oil to reduce/prevent tar formation
EP1561797A1 (fr) * 2004-02-07 2005-08-10 Oss Group Limited Procédé d'amélioration d'huile

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB193029A (en) * 1922-02-07 1924-01-10 Apolline Rialland Process for purifying mineral oils
FR1215255A (fr) * 1958-11-13 1960-04-15 Lorraine Laminage Procédé de récupération des huiles usées
FR1285332A (fr) * 1961-01-10 1962-02-23 Rech S Et D Expl Des Procedes Procédé pour la floculation et la régénération des huiles minérales usagées
US3505307A (en) * 1968-03-04 1970-04-07 Chevron Res Ricinoleate as oil-water demulsifier
US3607731A (en) * 1969-04-09 1971-09-21 Quvoe Chemical Ind Inc Re-refined waste crankcase oils and method
EP0009935A1 (fr) * 1978-09-28 1980-04-16 A.L. Salusinszky And Associates (Proprietary) Ltd. Procédé pour l'élimination des métaux et de l'eau de l'huile lubrifiante hydrocarbonée usée
WO1983002623A1 (fr) * 1982-01-25 1983-08-04 Norman, George, R. Procede de traitement d'huiles usees de moteur et d'huiles brutes synthetiques
DE3916732A1 (de) * 1989-05-23 1990-11-29 Baufeld Oel Gmbh Verfahren und vorrichtung zur entmetallisierung und weiteren aufbereitung von altoelen

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB193029A (en) * 1922-02-07 1924-01-10 Apolline Rialland Process for purifying mineral oils
FR1215255A (fr) * 1958-11-13 1960-04-15 Lorraine Laminage Procédé de récupération des huiles usées
FR1285332A (fr) * 1961-01-10 1962-02-23 Rech S Et D Expl Des Procedes Procédé pour la floculation et la régénération des huiles minérales usagées
US3505307A (en) * 1968-03-04 1970-04-07 Chevron Res Ricinoleate as oil-water demulsifier
US3607731A (en) * 1969-04-09 1971-09-21 Quvoe Chemical Ind Inc Re-refined waste crankcase oils and method
EP0009935A1 (fr) * 1978-09-28 1980-04-16 A.L. Salusinszky And Associates (Proprietary) Ltd. Procédé pour l'élimination des métaux et de l'eau de l'huile lubrifiante hydrocarbonée usée
WO1983002623A1 (fr) * 1982-01-25 1983-08-04 Norman, George, R. Procede de traitement d'huiles usees de moteur et d'huiles brutes synthetiques
DE3916732A1 (de) * 1989-05-23 1990-11-29 Baufeld Oel Gmbh Verfahren und vorrichtung zur entmetallisierung und weiteren aufbereitung von altoelen

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
CHEMICAL ABSTRACTS, vol. 100, no. 16, April 1984, Columbus, Ohio, US; abstract no. 123866, WHEATLEY 'CLEANING USED OILS' page 156 ;column 1 ; *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2393448A (en) * 2002-09-28 2004-03-31 Oss Group Ltd Treatment of oil to reduce/prevent tar formation
EP1561797A1 (fr) * 2004-02-07 2005-08-10 Oss Group Limited Procédé d'amélioration d'huile

Also Published As

Publication number Publication date
AU3368693A (en) 1993-07-28

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