POLYARYLENE SULFIDE PRODUCTION METHOD AND POLYARYLENE SULFIDE PRODUCED USING PRODUCTION METHOD

POLYARYLENE SULFIDE PRODUCTION METHOD AND POLYARYLENE SULFIDE PRODUCED USING PRODUCTION METHOD

The present invention is a production method for producing polyarylene sulfide, the method include: (a) a polymerization step; (b) a separation step; and (c) a recovery step of recovering an unreacted dihalo aromatic compound from a water-containing mixture in the form of a water-containing liquid m...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Hauptverfasser: KAWAMA HIROHITO, SUZUKI KOICHI, MIYAHARA MICHIHISA
Format: Patent
Sprache:eng
Schlagworte:
CHEMISTRY
COMPOSITIONS BASED THEREON
MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
METALLURGY
ORGANIC MACROMOLECULAR COMPOUNDS
THEIR PREPARATION OR CHEMICAL WORKING-UP
Online-Zugang:Volltext bestellen
Tags: Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
Beschreibung
Zusammenfassung:The present invention is a production method for producing polyarylene sulfide, the method include: (a) a polymerization step; (b) a separation step; and (c) a recovery step of recovering an unreacted dihalo aromatic compound from a water-containing mixture in the form of a water-containing liquid mixture containing the separated liquid by steam distillation entailing adjusting the reflux ratio of water in the steam distillation column without adding water other than the refluxed water. Alternatively, the present invention is a production method for producing polyarylene sulfide, the method include: (a) a polymerization step; (d) a dehydration step; and (c) a recovery step of recovering an unreacted dihalo aromatic compound from a water-containing mixture in the form of a water-containing liquid mixture and/or a water-containing steam mixture containing a raw material mixture and/or a polymerization reaction solution by steam distillation entailing adjusting the reflux ratio of water in the steam distillation column without adding water other than the refluxed water in the dehydration step.