Distillation: processes – separatory – Adding material to distilland except water or steam per se – Organic compound
Patent
1987-01-27
1988-10-11
Bascomb, Wilbur
Distillation: processes, separatory
Adding material to distilland except water or steam per se
Organic compound
203 84, 203DIG9, 208313, 208326, 585808, 585860, 585865, B01D 340, C07C 708, C10G 708
Patent
active
047769270
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.
REFERENCES:
patent: 2069329 (1937-02-01), Roelfsema
patent: 2376870 (1945-05-01), Engel
patent: 3259555 (1966-07-01), Lankton et al.
patent: 3679579 (1972-07-01), Preusser et al.
Emmrich Gerd
Preusser Gerhard
Bascomb Wilbur
Krupp=Koppers GmbH
Striker Michael J.
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