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US 2010/0137663 A1Published application
Combination of Hydrogenation and Base Catalyzed Depolymerization for Lignin Conversion
AssigneeUop LLC
InventorsJohn Q. Chen, Mark B. Koch
Life of this patent
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Abstract
A process for the conversion of lignin to chemical precursors is presented. The process comprises treating the lignin to form less acidic compounds. The process includes reacting lignin with a hydrogenation catalyst under a hydrogen atmosphere to convert acidic oxygenate compounds to less acidic oxygenates or hydrocarbons. The oxygenate compounds are reacted in a dehydrogenation and deoxygenation process to remove the oxygen and to convert the cyclic hydrocarbons back to aromatic compounds.
Claims21
A process for producing chemicals from lignin, comprising:
- combining lignin with a hydrogenation catalyst under a hydrogen atmosphere;
- reacting the mixture at lignin hydrolysis process conditions to form an intermediate product stream having a reduced oxygen content;
- and
- contacting the intermediate product stream with a deoxygenation and a dehydrogenation catalyst at dehydrogenation reaction conditions thereby generating a product stream comprising aromatic compounds.
1 more element
(canceled)
A process for producing chemicals from lignin, comprising:
- combining lignin with a base and a hydrogenation catalyst under a hydrogen atmosphere, at a pressure between 3.4 MPa to about 14 MPa, to form a mixture having a pH greater than 6;
- reacting the mixture at lignin hydrolysis process conditions to form an intermediate product stream having a reduced oxygen content;
- recovering the base used for lignin hydrolysis process;
- and
- contacting the intermediate product stream with a dehydrogenation catalyst at dehydrogenation reaction conditions to form a product stream comprising aromatic compounds.
2 more elements
Dependencies are inferred from the claim text.