Production of Terephthalic Acid from Lignin-Based Phenolic Acids by a Cascade Fixed-Bed Process

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• 作者：Zhiyu Bai ; Wen Chuen Phuan ; Jun Ding ; Teck Huat Heng ; Jizhong Luo ; Yinghuai Zhu
• 刊名：ACS Catalysis
• 出版年：2016
• 出版时间：September 2, 2016
• 年：2016
• 卷：6
• 期：9
• 页码：6141-6145
• 全文大小：368K
• 年卷期：0
• ISSN：2155-5435

文摘

Vanillic acid and syringic acid were converted to terephthalic acid via a two-step process using a fixed-bed reactor. The cascade route includes hydrogenation demethoxylation and carboxylation reactions. Activated carbon (AC)-supported MoWBO_x and PdNiO_x were determined to be suitable catalyst precursors for the process. An intermediate of p-hydroxybenzoic acid (HBA) was produced from the demethoxylation in 71.6% selectivity, and the terephthalic acid was obtained in 58.7% yield with 66.4% HBA conversion.