Global Patent Index - EP 0417980 A1

EP 0417980 A1 19910320 - 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

EP 0417980 A1 19910320 (EN)

Application

EP 90309772 A 19900906

Priority

DE 3930422 A 19890912

Abstract (en)

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

C10G 21/00

IPC 8 full level

C10G 21/00 (2006.01)

CPC (source: EP)

C10G 21/00 (2013.01)

Citation (search report)

[AD] DE 2343238 A1 19740314 - BRITISH PETROLEUM CO

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