Chemistry of hydrocarbon compounds – Purification – separation – or recovery – By addition of extraneous agent – e.g. – solvent – etc.
Patent
1995-04-20
1996-01-02
Gibson, Sharon
Chemistry of hydrocarbon compounds
Purification, separation, or recovery
By addition of extraneous agent, e.g., solvent, etc.
C07C 700
Patent
active
054810604
ABSTRACT:
A process for the removal of trace quantities of polynuclear aromatic compounds from the vapor effluent of a hydrocarbon dehydrogenation zone containing normally gaseous olefinic hydrocarbons, trace mononuclear aromatic compounds and trace polynuclear aromatic compounds by contacting the vapor effluent of a hydrocarbon dehydrogenation zone with a lean liquid absorption stream comprising at least one mononuclear aromatic compound to absorb at least a portion of the trace mononuclear aromatic compounds and the trace polynuclear aromatic compounds to produce a rich liquid absorption stream and a gaseous olefin-containing hydrocarbon stream having a reduced concentration of mononuclear aromatic compounds and polynuclear aromatic compounds. The rich liquid absorption stream is separated to produce a stream rich in mononuclear aromatic compounds and a stream comprising polynuclear aromatic compounds. At least a portion of the stream rich in mononuclear aromatic compounds is recycled to provide at least a portion of the lean liquid absorption stream.
REFERENCES:
patent: 4430517 (1984-02-01), Imai et al.
patent: 4822948 (1989-04-01), Larue et al.
Glover Bryan K.
Scott Norman H.
Zimmermann Joseph E.
Cutts, Jr. John G.
Gibson Sharon
McBride Thomas K.
Phan Nhat D.
Tolomei John G.
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