Process for the preparation of aqueous sodium methioninate solutions and use of these solutions for the preparation of a granulate

Process for the preparation of aqueous sodium methioninate solutions and use of these solutions for the preparation of a granulate

Production of aqueous sodium methioninate (I) solution containing little sodium carbonate from the crude mixture from alkaline hydrolysis of 5-( beta -methylmercapto-ethyl)-hydantoin (II) comprises: (a) distilling water from mixture, preferably with sodium hydroxide addition, until the (I) content i...

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Bibliographische Detailangaben
Hauptverfasser: KOERFER, MARTIN, KNIESEL, HEIDEMARIE DR, ROHLAND, LUTZ, HASSELBACH, HANS JOACHIM DR, ALT, HANS CHRISTIAN, HUTHMACHER, KLAUS DR, BINDER, WOLFRAM DR
Format: Patent
Sprache:eng ; fre ; ger
Schlagworte:
ACYCLIC OR CARBOCYCLIC COMPOUNDS
CHEMISTRY
FODDER
FOODS OR FOODSTUFFS
HUMAN NECESSITIES
METALLURGY
ORGANIC CHEMISTRY
THEIR TREATMENT, NOT COVERED BY OTHER CLASSES
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Zusammenfassung:Production of aqueous sodium methioninate (I) solution containing little sodium carbonate from the crude mixture from alkaline hydrolysis of 5-( beta -methylmercapto-ethyl)-hydantoin (II) comprises: (a) distilling water from mixture, preferably with sodium hydroxide addition, until the (I) content is 60-90 wt.%; and (b) separating the sodium carbonate precipitate at 90-140 degrees C. Production of aqueous sodium methioninate (I) solution containing little sodium carbonate from the crude mixture from the alkaline hydrolysis of 5-( beta -methylmercapto-ethyl)-hydantoin (II) with 1.1-6 equivalents of sodium hydroxide and/or carbonate comprises: (a) distilling water from the mixture, preferably with addition of more sodium hydroxide, until the (I) content is 60-90 wt.%; and (b) separating the sodium carbonate precipitate in anhydrous form or as monohydrate and/or bicarbonate, at 90-140 degrees C. An Independent claim is also included for free-running (I) granulate.