Extractive distillation of conjugated diene
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United States of America Patent
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Dec 13, 2011
Grant Date -
Sep 30, 2010
app pub date -
Mar 30, 2009
filing date -
Mar 30, 2009
priority date (Note) -
Expired
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Abstract
A process for isolating a conjugated diene from a hydrocarbon mixture is disclosed. The process comprises distilling the hydrocarbon mixture in the presence of an extraction solvent comprising an N,N-dialkyl aliphatic amide and from 12 to 50 weight percent furfural to separate a distillate and a conjugated diene-rich extract; and recovering the conjugated diene from the extract.
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