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Chemical Science

Chemical Science

IF: 7.59
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Selective catalytic transformation of lignin with guaiacol as the only liquid product?

Published:16 December 2019 DOI: 10.1039/C9SC05892C PMID: 34123258
Xiaojun Shen, Qinglei Meng, Qingqing Mei, Huizhen Liu, Jiang Yan, Jinliang Song, Dongxing Tan, Bingfeng Chen, Zhanrong Zhang, Guanying Yang and Buxing Han

Abstract

Guaiacol is an important feedstock for producing various high-value chemicals. However, the current production route of guaiacol relies heavily on fossil resources. Using lignin as a cheap and renewable feedstock to selectively produce guaiacol has great potential, but it is a challenge because of its heterogeneity and inert reactivity. Herein, we discovered that La(OTf)3 could catalyze the transformation of lignin with guaiacol as the only liquid product. In the reaction, La(OTf)3 catalyzed the hydrolysis of lignin ether linkages to form alkyl-syringol and alkyl-guaiacol, which further underwent decarbonization and demethoxylation to produce guaiacol with a yield of up to 25.5 wt%, and the remaining residue was solid. In the scale-up experiment, the isolated yield of guaiacol reached up to 21.2 wt%. To our knowledge, this is the first work to produce pure guaiacol selectively from lignin. The bio-guaiacol may be considered as a platform to promote lignin utilization.

Substances (3)

Related products
Procduct Name CAS Molecular Formula Supplier Price
Guaiacol 90-05-1 C7H8O2 843 suppliers $5.00-$7454.72
Lanthanum trifluoromethanesulfonate 52093-26-2 C3F9LaO9S3 244 suppliers $5.00-$1158.83
Lignin 9005-53-2 unspecified 132 suppliers $30.00-$320.00

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