VERFAHREN ZUR REINIGUNG VON POLYETHERPOLYOLEN, HERGESTELLT MIT DOPPELMETALLCYANID-KATALYSATOREN

Purificn. of a poly(oxypropylene) polyol is effected by (a) combining a polyol that contains double metal cyanide (DMC) catalyst residues with an amt. of an alkali metal cpd. sufficient to convert the catalyst residues to an insoluble species but not sufficient to generate polyol alkoxide gps., (b)...

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Bibliographische Detailangaben
1. Verfasser:	RUSZKAY, JUDE T
Format:	Patent
Sprache:	ger
Schlagworte:	CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY 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 THEIR PREPARATION OR CHEMICAL WORKING-UP THEIR RELEVANT APPARATUS TRANSPORTING
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Beschreibung
Zusammenfassung:	Purificn. of a poly(oxypropylene) polyol is effected by (a) combining a polyol that contains double metal cyanide (DMC) catalyst residues with an amt. of an alkali metal cpd. sufficient to convert the catalyst residues to an insoluble species but not sufficient to generate polyol alkoxide gps., (b) heating the mixt. in the absence of magnesium silicate with at least ca. 1.5 wt.% water based on polyol, at 80-150 [deg] C; (c) filtering the polyol mixt. to remove insoluble catalyst residues; and (d) stripping the polyol mixt. to remove water.