Extraction of polylactams

The continuous countercurrent extraction of polylactam granules with hot water in an extraction zone for the removal of monomer and/or oligomers, the extraction zone being subdivided into subzones by at least one heating zone. The density of the extract-containing water differs by at least 0.0002 be...

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Bibliographische Detailangaben
Hauptverfasser: KISSEL, ERNST, GUENTHER, VALENTIN, GUENTER, NEUMANN, ECKART, HOERAUF, WERNER
Format: Patent
Sprache:eng
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Zusammenfassung:The continuous countercurrent extraction of polylactam granules with hot water in an extraction zone for the removal of monomer and/or oligomers, the extraction zone being subdivided into subzones by at least one heating zone. The density of the extract-containing water differs by at least 0.0002 between the subzones.