Process for the separation of aromatic hydrocarbons from a hydrocarbon mixture
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United States of America Patent
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Oct 11, 1988
Grant Date -
N/A
app pub date -
Jan 27, 1987
filing date -
Jan 25, 1986
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A process is disclosed for the separation of aromates from hydrocarbon mixtures of optional aromate content through extractive distillation using N-substituted morpholine displaying substituents having no more than 7 C-atoms as selective solvent. Part of the solvent is delivered to the uppermost plate of the extractive distillation column and the remainder of the solvent, preferably amounting to between 10 and 40% by weight, is introduced into the extractive distillation column in at least two partial streams onto plates above the inlet for the hydrocarbon mixture. The temperature of the respective solvent partial streams is adjusted to neither exceed the temperature of the corresponding delivery plates nor fall below this temperature by more than 10.degree. C.
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