Verfahren und Anlage zum Rückgewinnen von Ethylen-Glykol in einem Polyethylenterephthalat-Polykondensationsprozeß

A process is disclosed for recovering diols from a diol esterifying process with dicarboxylic acids and/or from a hydrolysing process of a diol polycondensation product with dicarboxylic acids. The by-product represented by waste water contaminated with a residual amount of diols is purified by reve...

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Bibliographische Detailangaben
Hauptverfasser:	MAKONNEN, GIRMA., 50969 KOELN, DE, JUERGENS, THEODOR., 44581 CASTROP-RAUXEL, DE
Format:	Patent
Sprache:	ger
Schlagworte:	ACYCLIC OR CARBOCYCLIC COMPOUNDS AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G CHEMISTRY COMPOSITIONS BASED THEREON GENERAL PROCESSES OF COMPOUNDING MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS METALLURGY ORGANIC CHEMISTRY ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-UP TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE WORKING-UP
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Beschreibung
Zusammenfassung:	A process is disclosed for recovering diols from a diol esterifying process with dicarboxylic acids and/or from a hydrolysing process of a diol polycondensation product with dicarboxylic acids. The by-product represented by waste water contaminated with a residual amount of diols is purified by reverse osmosis and/or micro-filtration in order to produce pure water and diol separated from said pure water that may be returned to the esterifying and/or hydrolysing process.