METHOD FOR SEPARATING CITRACONIC ACID

PURPOSE:To obtain the titled compound useful as various synthetic raw materials readily in high purity, by bringing an aqueous solution containing citraconic acid and maleic acid into contact with a basic anion exchange resin by simple operation. CONSTITUTION:An aqueous solution containing citraconi...

Ausführliche Beschreibung

Gespeichert in:

Bibliographische Detailangaben
Hauptverfasser:	IWASAKI KOZO, SEZAKI YOSHIHIRO, KOSHIBE MINORU, YOGUCHI KATSUJI, KURAGANO MORIMASA
Format:	Patent
Sprache:	eng
Schlagworte:	ACYCLIC OR CARBOCYCLIC COMPOUNDS CHEMISTRY METALLURGY ORGANIC CHEMISTRY
Online-Zugang:	Volltext bestellen
Tags:	Tag hinzufügen Keine Tags, Fügen Sie den ersten Tag hinzu!

Beschreibung
Zusammenfassung:	PURPOSE:To obtain the titled compound useful as various synthetic raw materials readily in high purity, by bringing an aqueous solution containing citraconic acid and maleic acid into contact with a basic anion exchange resin by simple operation. CONSTITUTION:An aqueous solution containing citraconic acid and maleic acid is brought into contact with a basic anion exchange resin, and the resultant aqueous solution containing the citraconic acid in a high concentration is concentrated and dehydrated to afford the aimed citraconic acid. Various kinds of both strongly basic and weakly basic anion exchange resins can be used as the basic anion exchange resin. An aqueous solution, which is a vapor-phase catalytci oxidation product of isoprene, isobutylene or o-xylene is used as the above-mentioned aqueous solution. The citraconic acid of high purity can be obtained in the similar way even if any acid other than acids having a dissociation constant close to that of the citraconic acid is contained in the above- mentioned aqueous solution.