SEPARATIONS USING AMPHOLYTIC BASE POLYMERS

Described are processes for separating acids from other compounds in solution utilizing ampholytic base polymers in chromatographic-type separations. Preferred processes are conducted in continuous contacting apparatuses and involve the establishment of separation and elution zones to provide acid p...

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Bibliographische Detailangaben
Hauptverfasser:	WYETH, JOHN, T, MCQUIGG, DONALD, W, WEISHEIT, KATHERINE, M, CROWE, ERNEST, SCRIVEN, ERIC, F., V, GRENDZE, MARTIN
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	ACYCLIC OR CARBOCYCLIC COMPOUNDS CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY CHEMISTRY COMPOSITIONS BASED THEREON MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS METALLURGY ORGANIC CHEMISTRY ORGANIC MACROMOLECULAR COMPOUNDS PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL SEPARATION THEIR PREPARATION OR CHEMICAL WORKING-UP THEIR RELEVANT APPARATUS TRANSPORTING
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Beschreibung
Zusammenfassung:	Described are processes for separating acids from other compounds in solution utilizing ampholytic base polymers in chromatographic-type separations. Preferred processes are conducted in continuous contacting apparatuses and involve the establishment of separation and elution zones to provide acid product streams of high purity and concentration. Preferred processes achieve the purification of citric acid from its admixture with one or more sugars such as glucose under substantially isothermal conditions. L'invention concerne des processus permettant de séparer des acides d'autres composés en solution, à l'aide de polymères ampholytes de base utilisés pour des séparations du type chromatographique. Les processus préférés de cette invention, mis en oeuvre dans des appareils de contact continu, consistent à établir des zones de séparation et d'élution afin de fournir des flux de produits acides d'une pureté et d'une concentration élevées. Ces processus préférés permettent ainsi de purifier de l'acide nitrique à partir de son incorporation à un ou plusieurs sucres, par exemple le glucose, dans des conditions sensiblement isothermiques.