POLYPHENYLENE-OXIDE SYNTHESIS AND RECOVERY METHOD FOR THE RESULTED SOLVENTS

The process comprises fractionation of the solvents at atmospheric pressure on a continuous column. The azeotropic benzene-isopropanol mixt. collected as the lateral fraction, and the distillate contg. morpholine, isopropanol and benzene from distillation, are recirculated in the oxide synthesis pha...

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Bibliographische Detailangaben
Hauptverfasser:	IONESCU IOANA, RO, SAVESCU VICTORIA, RO, CIOROIANU DOINA, RO, SIMOIU LUMINITA, RO, DOCA ION, RO, MOCIOACA GABRIELA, RO
Format:	Patent
Sprache:	eng ; rum
Schlagworte:	CHEMISTRY COMPOSITIONS BASED THEREON MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL SEPARATION THEIR PREPARATION OR CHEMICAL WORKING-UP TRANSPORTING
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Beschreibung
Zusammenfassung:	The process comprises fractionation of the solvents at atmospheric pressure on a continuous column. The azeotropic benzene-isopropanol mixt. collected as the lateral fraction, and the distillate contg. morpholine, isopropanol and benzene from distillation, are recirculated in the oxide synthesis phase. The organic phase of the prod. separated at the top of the column is recirculated to the column feed.