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US 2018/0022721 A1Published application
Continuous hydrogenation of levulinic acid
AssigneeDsm IP Assets B.V.
InventorsBarthel ENGENDAHL, Roel Wim WIERTZ, Jan VAN DER SPOEL
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AssigneeDsm IP Assets B.V.
InventorsBarthel ENGENDAHL, Roel Wim WIERTZ, Jan VAN DER SPOEL
Estimating the term…
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.
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
Method to stabilize a solid Ru catalyst, which catalyst is suitable for a hydrogenation reaction, said process comprising contacting the catalyst with a reductant in a solvent comprising water prior to the hydrogenation reaction.
Dependencies are inferred from the claim text.