CONTINUOUS HYDROGENATION OF LEVULINIC ACID

The invention relates to a continuous or repetitive batch process for the hydrogenation of levulinic acid (LA) or esters thereof to at least gamma valerolactone (GVL) in a reactor comprising a feed stream and an outlet stream, in the presence of a solid Ru catalyst, said process comprising (a) pretr...

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Bibliographische Detailangaben
Hauptverfasser:	ENGENDAHL Barthel, WIERTZ Roel Wim, VAN DER SPOEL Jan
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY CHEMISTRY HETEROCYCLIC COMPOUNDS METALLURGY ORGANIC CHEMISTRY PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL THEIR RELEVANT APPARATUS TRANSPORTING
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Beschreibung
Zusammenfassung:	The invention relates to a continuous or repetitive batch process for the hydrogenation of levulinic acid (LA) or esters thereof to at least gamma valerolactone (GVL) in a reactor comprising a feed stream and an outlet stream, in the presence of a solid Ru catalyst, said process comprising (a) pretreating said solid Ru catalyst with a reductant; and (b) reacting levulinic acid with hydrogen and the pretreated solid Ru catalyst obtained in step (a) at a temperature and residence time suitable to form at least GVL, characterized in that the pretreatment is in the presence of a first solvent which comprises water. This process is stable and little or no Ru will leak form the support.