Process for the removal of heavy hydrocarbonaceous co-products f

Details Process for the removal of heavy hydrocarbonaceous co-products f Process for the removal of heavy hydrocarbonaceous co-products f

1997-09-09

1999-08-24

Caldarola, Glenn

Chemistry of hydrocarbon compounds

Purification, separation, or recovery

By plural serial diverse separations

585804, 585805, 585807, 585809, 585867, 585655, C07C 700, C07C 5327

Patent

active

059426551

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 alkylated 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, a stream rich in alkylated mononuclear aromatic compounds and a stream comprising polynuclear aromatic compounds. At least a portion of the stream rich in mononuclear aromatic compounds is alkylated with indigenous olefins to provide at least a portion of the lean liquid absorption stream.

REFERENCES:
patent: 4430517 (1984-02-01), Imai et al.
patent: 5414168 (1995-05-01), Scott
patent: 5672804 (1997-09-01), Glover
patent: 5849979 (1998-12-01), Kalnes et al.

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