Process to recover benzene from mixed hydrocarbons by extractive distillation
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United States of America Patent
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Mar 21, 1995
Grant Date -
N/A
app pub date -
Dec 6, 1993
filing date -
Dec 6, 1993
priority date (Note) -
Expired
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Abstract
Benzene and other aromatics are separated from a stream of mixed hydrocarbons containing both aromatics and non-aromatics by extractive distillation with a solvent system containing dimethyl sulfoxide and optionally a co-solvent, preferably water, followed by distillation stripping of the aromatics from the enriched solvent system, and recycle of the lean solvent system to the extractive distillation step.
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