Method of refining waste oil

(19)

(11)

EP 0 940 466 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	06.09.2000 Bulletin 2000/36

(43)	Date of publication A2:
	08.09.1999 Bulletin 1999/36

(21)	Application number: 99104198.9

(22)	Date of filing: 02.03.1999

(51)	International Patent Classification (IPC)⁷: C10M 175/00, C10G 21/00, B01D 1/30

(84)	Designated Contracting States:
	AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
	Designated Extension States:
	AL LT LV MK RO SI

(30)

Priority:

04.03.1998 GB 9804481

(71)	Applicant: OLIM TECHNOLOGIES SA
	1005 Lausanne (CH)

(72)	Inventor:
	The inventor has agreed to waive his entitlement to designation.

(74)	Representative: Lucking, David John
	FORRESTER & BOEHMERT Franz-Joseph-Strasse 38 80801 München 80801 München (DE)

(54)	Method of refining waste oil

(57) A method of refining waste oil containing contaminants and water comprising the steps of contacting the waste oil with an aliphatic solvent to form a waste oil/aliphatic solvent mixture, and in a treatment vessel (11) separating the mixture into three phases, namely a bottom phase (I) comprising predominantly water, an intermediate phase (II) comprising predominantly residuum containing contaminants and a top phase (III) comprising predominantly an oil/aliphatic solvent solution.

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