EP 0144216 B1 19880210 - REMOVAL OF POLYCHLORINATED BIPHENYLS BY SOLVENT EXTRACTION
Title (en)
REMOVAL OF POLYCHLORINATED BIPHENYLS BY SOLVENT EXTRACTION
Publication
Application
Priority
US 55919183 A 19831207
Abstract (en)
[origin: EP0144216A1] For continuous removal of polychlorinated biphenyl compounds (PCB) from oil contaminated therewith, PCB compounds are continuously extracted from contaminated oil with a PCB-selective solvent in the stripping section (51) of a multistage extraction zone (6). The extract (10) from the extraction zone (52) is partially distilled in a distillation zone (11). The bottom residue (29) is cooled (32) and separated (34) into a solvent phase (44) and an oil/PCB phase (35), and a major portion (43) of the oil/PCB phase continuously recycled as extract reflux to the enriching section (52) of the extraction zone (6) where PCB compounds are extracted from the recycled portion by the solvent phase produced in the stripping section (51) of the extraction zone (6) to increase the PCB content of the extract. A minor portion (40) of the oil/PCB phase from the separation step (34) is withdrawn as a disposable PCB residue.
IPC 1-7
IPC 8 full level
C10G 21/00 (2006.01); C10G 21/28 (2006.01); C10M 175/00 (2006.01)
CPC (source: EP)
C10G 21/00 (2013.01); C10G 21/006 (2013.01); C10G 21/28 (2013.01)
Designated contracting state (EPC)
AT BE DE FR GB IT NL
DOCDB simple family (publication)
EP 0144216 A1 19850612; EP 0144216 B1 19880210; AT E32463 T1 19880215; CA 1265086 A 19900130; DE 3469301 D1 19880317
DOCDB simple family (application)
EP 84308299 A 19841129; AT 84308299 T 19841129; CA 469478 A 19841206; DE 3469301 T 19841129