Method for the depolymerization of lignin
AssigneeStichting Dienst Landbouwkundig Onderzoek
InventorsDaniël Stephan VAN ES, Frits VAN DER KLIS, Jacobus VAN HAVEREN, Richard Johannes Antonius GOSSELINK
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Abstract
A catalytic method is disclosed for the valorization of lignin. The method comprises subjecting lignin to a catalyzed hydrothermal conversion reaction, said reaction being conducted in the presence of water at an alkaline pH>8 and a temperature of 200° C.-300° C., under the influence of a noble metal catalyst comprising a carbon support. The same reaction can also be applied to subsequently defunctionalize one or more phenolic compounds, notably guaiacol, so as to produce six-membered cyclic hydrocarbons, such as phenol.
Claims10
-6. (canceled)
A process for the production of six-membered cyclic hydrocarbon compounds from lignin, the method comprising subjecting lignin to a depolymerization method according to any one of the claims 1 to 5, so as to obtain one or more phenolic compounds, and subjecting the phenolic compounds to a catalyzed hydrothermal defunctionalization reaction, said reaction being conducted in the presence of water at an alkaline pH>8 and a temperature of 200° C.-300° C., under the influence of a noble metal catalyst on a carbon support.
A process for the defunctionalization of one or more phenolic compounds selected from the group consisting of phenol, C1-6 alkyl alkoxy phenols, and acetosyringone (4-hydroxy-3,5-dimethoxyacetophenone), comprising subjecting the one or more phenolic compounds to a catalyzed hydrothermal defunctionalization reaction, said reaction being conducted in the presence of water at an alkaline pH>8 and a temperature of 200° C.-300° C., under the influence of a noble metal catalyst on a carbon support.
Dependencies are inferred from the claim text.