Production of Terephthalic Acid from Corn Stover Lignin

Song, Song and Zhang, Jiaguang and Gökalp, Gözaydın and Yan, Ning (2019) Production of Terephthalic Acid from Corn Stover Lignin. Angewandte Chemie International Edition . ISSN 1433-7851

Full content URL: https://doi.org/10.1002/ange.201814284

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Production of Terephthalic Acid from Corn Stover Lignin
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Abstract

Funneling and functionalization of a mixture of lignin-derived monomers into a single high-value chemical is fascinating. Herein, we report a three-step strategy for the production of terephthalic acid (TPA) from lignin-derived monomer mixtures, in which redundant, non-uniform substitutes such as methoxyl groups are removed and the desired carboxyl groups are introduced. The strategy starts with hydro-treating of corn stover-derived lignin oil over supported molybdenum catalyst to selectively remove methoxyl groups. The generated 4-alkylphenols are converted into 4-alkylbenzoic acids via carbonylation with carbon monoxide. Co-Mn-Br catalyst then oxidizes various alkyl chains into carboxyl groups, transforming the 4-alkylbenzoic acids mixture into a single product: TPA. Based on this route, the overall yields of TPA based on lignin content of corn stover could reach 15.5 wt%, and importantly, TPA with >99% purity was obtained simply by first decanting the reaction mixture, followed by washing the solid product with water.

Keywords:carbonylation, de-methoxylation, lignin, renewable chemical, terephthalic acid, carbonylation, de-methoxylation, lignin, renewable chemical, terephthalic acid
Subjects:F Physical Sciences > F100 Chemistry
Divisions:College of Science > School of Chemistry
ID Code:34857
Deposited On:18 Mar 2019 15:06

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