EP 0417980 B1 19970625 - Process for the production of process oils with a low content of polycyclic aromatic compounds
Title (en)
Process for the production of process oils with a low content of polycyclic aromatic compounds
Title (de)
Verfahren zur Herstellung von Produktölen mit niedrigem Polycycloaromatengehalt
Title (fr)
Procédé de préparation d'huiles de production à basse teneur en aromatiques polycycliques
Publication
Application
Priority
DE 3930422 A 19890912
Abstract (en)
[origin: EP0417980A1] Process oils with an aromatic content of more than 50 weight %, in particular of more than 55 weight %, according to ASTM D 2007 and a content of polycyclic aromatic compounds of less than 3 weight % according to IP 346 are prepared from a primary extract (4) obtained by treatment of a lubricating oil distillate originating a mineral oil with a polar solvent. The primary extract (4) is extracted in a counter current extraction column (1) with a polar solvent (2) using a volume ratio of primary extract fed to the column to polar solvent in the range 1:1 to 1:1.8 as well as a temperature in the head region of the counter current extraction column in the range 50-90 DEG C and in the bottom region of 20-60 DEG C and with the head temperature higher than the bottom temperature.
IPC 1-7
IPC 8 full level
C10G 21/00 (2006.01)
CPC (source: EP)
C10G 21/00 (2013.01)
Designated contracting state (EPC)
BE DE ES FR GB GR IT NL
DOCDB simple family (publication)
EP 0417980 A1 19910320; EP 0417980 B1 19970625; DD 297660 A5 19920116; DE 3930422 A1 19910321; DE 69030970 D1 19970731; DE 69030970 T2 19971218; ES 2104589 T3 19971016; PT 95270 A 19910522; PT 95270 B 19970930
DOCDB simple family (application)
EP 90309772 A 19900906; DD 34391390 A 19900910; DE 3930422 A 19890912; DE 69030970 T 19900906; ES 90309772 T 19900906; PT 9527090 A 19900911