PROCESSES FOR PURIFYING CRUDE POLYOL-CONTAINING COMPOSITIONS USING A SWEEP GAS

Improved processes for the purification of crude polyol-containing compositions (e.g., glycerol-containing compositions) using a sweep gas are reported. The processes may be used to strip polyols from crude polyol compositions that contain heavy impurities, or may be used to strip light impurities f...

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Bibliographische Detailangaben
1. Verfasser:	COCKREM, MICHAEL, CHARLES, MILNER
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	ACYCLIC OR CARBOCYCLIC COMPOUNDS ANIMAL AND VEGETABLE OILS, FATS, FATTY SUBSTANCES AND WAXES APPARATUS THEREFOR CANDLES CHEMISTRY DERIVATIVES THEREOF DETERGENTS FATS, OILS OR FATTY ACIDS BY CHEMICAL MODIFICATION OF FATS,OILS, OR FATTY ACIDS OBTAINED THEREFROM FATTY ACIDS FROM FATS, OILS OR WAXES FATTY ACIDS THEREFROM GENERAL METHODS OF ORGANIC CHEMISTRY METALLURGY NUCLEIC ACIDS NUCLEOSIDES NUCLEOTIDES ORGANIC CHEMISTRY SUGARS
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Beschreibung
Zusammenfassung:	Improved processes for the purification of crude polyol-containing compositions (e.g., glycerol-containing compositions) using a sweep gas are reported. The processes may be used to strip polyols from crude polyol compositions that contain heavy impurities, or may be used to strip light impurities from crude polyol compositions comprising light impurities. Advantageously, the processes of the invention do not require high processing temperatures or low processing pressures (i.e., vacuum) to purify the crude polyol-containing compositions. La présente invention concerne des procédés améliorés de purification de compositions brutes contenant des polyols (par exemple, des compositions contenant du glycérol) utilisant un gaz de lavage. Les procédés peuvent être utilisés pour distiller des polyols des compositions brutes de polyols contenant des impuretés lourdes, ou peuvent être utilisés pour distiller des impuretés légères des compositions brutes de polyols comprenant des impuretés légères. De manière avantageuse, les procédés de l'invention ne nécessitent pas des températures de traitement élevées ou des pressions de traitement basses (à savoir le vide) pour purifier les compositions brutes contenant des polyols.