Process for the mild distillative separation of mixtures
AssigneeLANXESS Deutschland GmbH
InventorsLudwig Deibele, Dieter Heinz, Jan Thomas Leu, Johannes-Peter Schafer, Kai Fahrenkamp, Wolfgang Scheinert, Thomas Schilling, Paul Wagner
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Abstract
The invention relates to a semibatchwise process for the mild distillative separation of mixtures, in a first stage a column being supplied continuously with a feed and the feed being separated at least into different fractions, one of the fractions being removed continuously into a container, and, in a second step, the fraction removed into the container being recycled to the column and being separated again batchwise into different fractions.
Claims13
A process for the distillative separation of mixtures, comprising:
- a) continuously supplying a column having a stripping section and a rectification section with a feed, separating the feed into fractions containing at least a low boiler fraction and a high boiler fraction, removing the high boiler fraction continuously into a container;
- and
- b) stopping the feed, recycling the high boiler fraction, removed in step a) into the container, to the column, separating the high boiler fraction batchwise by an ascending procedure into at least a further low boiler fraction and a further high boiler fraction.
Dependencies are inferred from the claim text.