VERFAHREN ZUR HERSTELLUNG VON C1- BIS C6-NALKYLPYRROLIDONEN AUS BERNSTEINSAEUREANHYDRID BZW. C1- BIS C6-N-ALKYLSUCCINIMID

VERFAHREN ZUR HERSTELLUNG VON C1- BIS C6-NALKYLPYRROLIDONEN AUS BERNSTEINSAEUREANHYDRID BZW. C1- BIS C6-N-ALKYLSUCCINIMID

C1- to C6-N-alkylpyrrolidones are produced from succinic anhydride and C1- to C6-N-alkylamines or C1- to C6-N-alkylsuccinimides. They are hydrogenated in the presence of a Ni hydrogenation catalyst containing from about 0.1-3% of one or several alkaline earth oxides and/or iron oxide and/or chromium...

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Hauptverfasser: OTTE, WERNER, ZUR HAUSEN, MANFRED
Format: Patent
Sprache:ger
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CHEMISTRY
GENERAL METHODS OF ORGANIC CHEMISTRY
HETEROCYCLIC COMPOUNDS
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Zusammenfassung:C1- to C6-N-alkylpyrrolidones are produced from succinic anhydride and C1- to C6-N-alkylamines or C1- to C6-N-alkylsuccinimides. They are hydrogenated in the presence of a Ni hydrogenation catalyst containing from about 0.1-3% of one or several alkaline earth oxides and/or iron oxide and/or chromium oxide, at temperatures of from about 180 DEG -250 DEG C. and under pressures of at least about 100 bar. Preferably, a Ni catalyst is utilized which contains a total of 1.5-2% alkaline earth oxides, iron oxide and chromium oxide.