Reversibly soluble bases for lignin oxidative depolymerization
AssigneeAlliance for Sustainable Energy, LLC
InventorsJacob S. Kruger, Gregg Tyler Beckham, David Gregory Brandner
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Abstract
Disclosed herein are lignin valorization strategies that integrate thermochemical pretreatment strategies. Using methods disclosed herein, yields of greater than 40% of usable monomers are obtained from lignin in biomass. The monomers can be assimilated by strains of Pseudomonas putida.
Claims12
A method for the depolymerization of lignin wherein the lignin is treated with alkali Sr(OH)2 wherein the Sr(OH)2 is recovered after treatment of the lignin wherein the recovery of Sr(OH)2 includes a step of cooling an alkaline oxidizing solution of lignin depolymerization products and filtering the Sr(OH)2 from the cooled alkaline oxidizing solution of lignin depolymerization products and further comprises a step of reacting the resulting filtrate with carbon dioxide and then extracting the products of the reaction between the filtrate and carbon dioxide with an organic solvent.
A method for the depolymerization of lignin wherein the lignin is treated with alkali Ba(OH)2 wherein the Ba(OH)2 is recovered after treatment of the lignin wherein the recovery of Ba(OH)2 includes the step of cooling an alkaline oxidizing solution of lignin depolymerization products and filtering the Ba(OH)2 from the cooled alkaline oxidizing solution of lignin depolymerization products and further comprises a step of reacting the resulting filtrate with carbon dioxide and then extracting the products of the reaction between the filtrate and carbon dioxide with an organic solvent.
Dependencies are inferred from the claim text.