EP 0835298 A1 19980415 - ALKALINE TREATMENT METHOD FOR REFINING USED OILS
Title (en)
ALKALINE TREATMENT METHOD FOR REFINING USED OILS
Title (de)
VERFAHREN ZUM RAFFINIEREN VON VERBRAUCHTEN SCHMIERÖLEN DURCH ALKALIBEHANDLUNG.
Title (fr)
PROCEDE DE RAFFINAGE D'HUILES USAGEES PAR TRAITEMENT ALCALIN
Publication
Application
Priority
- FR 9600974 W 19960621
- FR 9507484 A 19950622
Abstract (en)
[origin: US6072065A] PCT No. PCT/FR96/00974 Sec. 371 Date Apr. 20, 1998 Sec. 102(e) Date Apr. 20, 1998 PCT Filed Jun. 21, 1996 PCT Pub. No. WO97/00928 PCT Pub. Date Jan. 9, 1997An alkaline treatment method for refining used oils, wherein (a) the used oils are distilled; (b) the resulting distillate is treated with an alkaline agent in the presence of a solvent selected from water, a monoalcohol, a polyalcohol and a mixture of said a alcohols, said alkaline agent being present in a percentage by weight, based on the weight of the distillate, equal to the product Fx(IA+IS), where F is a multiplier between 2 and 50 and IA and IS are the acid value and the saponification value respectively of said distillate, at a temperatue of around 80-330 DEG C. for 2-200 minutes; (c) the reaction medium is washed with water then decanted to recover the oily phase; and (d) said oily phase is distilled. The method is useful for producing refined oils having excellent properties in that they are odorless and nearly colorless and in that they have a very low chlorine, phosphorus and sillicon content.
IPC 1-7
IPC 8 full level
C10M 175/00 (2006.01); C10M 175/02 (2006.01)
CPC (source: EP US)
C10M 175/0016 (2013.01 - EP US); C10M 175/0025 (2013.01 - EP US); C10M 175/02 (2013.01 - EP US)
Citation (search report)
See references of WO 9700928A1
Designated contracting state (EPC)
AT BE DE DK ES FI FR GB GR IE IT NL PT SE
DOCDB simple family (publication)
US 6072065 A 20000606; AT E201438 T1 20010615; CA 2222704 A1 19970109; DE 69612978 D1 20010628; DE 69612978 T2 20011220; DK 0835298 T3 20010827; EP 0835298 A1 19980415; EP 0835298 B1 20010523; ES 2125208 T1 19990301; ES 2125208 T3 20010901; FR 2735785 A1 19961227; FR 2735785 B1 19970808; NO 976008 D0 19971219; NO 976008 L 19980223; WO 9700928 A1 19970109
DOCDB simple family (application)
US 98174998 A 19980420; AT 96924004 T 19960621; CA 2222704 A 19960621; DE 69612978 T 19960621; DK 96924004 T 19960621; EP 96924004 A 19960621; ES 96924004 T 19960621; FR 9507484 A 19950622; FR 9600974 W 19960621; NO 976008 A 19971219