Verfahren zur Reinigung von 2-Chloropropionsäure

The present invention is directed to a method for recovering 2-chloropropionic acid so that this compound can be separated in a high-purity form. According to the method, crude 2-chloropropionic acid is heat-treated in the presence of a metal compound at a temperature in the range of 130-180 DEG C w...

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Bibliographische Detailangaben
Hauptverfasser:	ONO, YUZO, TAKAISHI-SHI, OSAKA-FU, JP, KITADO, SHOJI, TAKAISHI-SHI, OSAKA-FU, JP, KAJIKURI, THUTOMU, TAKAISHI-SHI, OSAKA-FU, JP, SENOO, KENJI, TAKAISHI-SHI, OSAKA-FU, JP
Format:	Patent
Sprache:	ger
Schlagworte:	ACYCLIC OR CARBOCYCLIC COMPOUNDS CHEMISTRY METALLURGY ORGANIC CHEMISTRY
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Beschreibung
Zusammenfassung:	The present invention is directed to a method for recovering 2-chloropropionic acid so that this compound can be separated in a high-purity form. According to the method, crude 2-chloropropionic acid is heat-treated in the presence of a metal compound at a temperature in the range of 130-180 DEG C where dichloro derivatives are contained as impurities or at a temperature not exceeding 160 DEG C where no dichloro derivatives are contained. The metal compound is then removed at 160 DEG C or lower. Final purification is thereafter conducted to obtain 2-chloropropionic acid as a high-purity product.