High purity benzene production using extractive distillation
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United States of America Patent
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Mar 28, 1995
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app pub date -
Oct 27, 1993
filing date -
Oct 28, 1992
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Abstract
A process is provided for separating benzene from non-aromatics in a highly aromatic stream containing olefins in a concentration range of from about 0.05 to about 5.0, which process comprises predistilling said highly aromatic stream to produce a distilled fraction having a concentration of C.sub.8 and heavier compounds of less than about 0.1 wt percent; and extracting said distilled fraction with a solvent comprising substituted morpholines in an extractive distillation zone to produce a highly-pure benzene stream.
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