EP 0574272 B1 20000405 - Improved process for the production of base stock oils from used oil
Title (en)
Improved process for the production of base stock oils from used oil
Title (de)
Verbessertes Verfahren zur Produktion von Grundölen aus Altöl
Title (fr)
Procédé amelioré pour la production d'huiles de base à partir d'huile usée
Publication
Application
Priority
US 89802592 A 19920612
Abstract (en)
[origin: EP0574272A2] The present invention provides an improved process for producing from used oil a lube oil base stock suitable for use in automobile lubricating oil comprising the steps of: (a) pretreating used oil to remove hydrofinishing catalyst fouling materials to give a pretreated mixture; (b) distilling the pretreated mixture from step (a) to separate a lower boiling distillate fraction which boils at less than 150 DEG C, a gasoil distillate fraction; and a lube oil distillate fraction from an asphalt fraction; and (c) hydrofinishing the lube oil distillate fraction from step (b). In step (a), a sufficient amount of an alkali compound is added under vigorous mixing conditions and in the presence of at least about 3% water to give a pH of at least about 5 in the gas phase of all the distillates produced in step (b). The conditions in step (a) can additionally be chosen so that substantially all free phosphorus is converted to an insoluble phosphate or phosphoro compound.
IPC 1-7
IPC 8 full level
C10G 1/00 (2006.01); C10G 67/10 (2006.01); C10M 175/00 (2006.01); C10M 175/02 (2006.01); C10N 40/25 (2006.01)
CPC (source: EP)
C10M 175/00 (2013.01)
Designated contracting state (EPC)
AT BE CH DE DK ES FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
EP 0574272 A2 19931215; EP 0574272 A3 19940223; EP 0574272 B1 20000405; AT E191496 T1 20000415; DE 69328274 D1 20000511; DE 69328274 T2 20001130; JP H06158086 A 19940607
DOCDB simple family (application)
EP 93304584 A 19930614; AT 93304584 T 19930614; DE 69328274 T 19930614; JP 14198993 A 19930614