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Method and apparatus for reprocessing raffinate from extractive distillation of hydrocarbon mixtures
Method and apparatus for reprocessing raffinate from extractive distillation of hydrocarbon mixtures
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机译:从烃混合物的萃取蒸馏中提炼残液的方法和设备
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摘要
A hydrocarbon material of the starting product is separated in an extractive distillation column in which an N-substituted morpholine whose substituents do not have more than seven carbon atoms is used as a selective solvent. The overhead product comes down as a top product of the extractive distillation and is fed through a coalescer in which the sump product comes down with a solvent content of 20 to 75% by weight at a temperature of 20 DEG to 70 DEG C. and subsequent to that is fed into a separating vessel. There it is separated into a heavier and lighter phase. After that the heavier phase is conducted into an extractive distillation column and the lighter phase into the overhead product distillation column.
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