Abstract

As the most abundant renewable source of aromatic building blocks in nature, lignin possesses significant potential to serve as a starting material for chemical and material production, offering viable alternatives to universally employed petroleum-derived products. The development of efficient catalytic methods for lignin depolymerization plays a pivotal role in the valorization of lignin. Numerous promising catalytic approaches have been developed in recent years, particularly the "Lignin-First" strategy. These innovative methods have yielded substantial quantities of unexpected mono-aromatic product structures. Considerable efforts have also been dedicated to the separation and utilization of these structures, especially in the production of novel fine chemicals and polymers based on lignin. The advancement of lignin refinery has also contributed to the progress of green chemistry. Undoubtedly, the refinement process for lignin will soon fill a crucial gap in biorefinery processes and generate greater value for modern society. This chapter provides a comprehensive overview of recent advancements in the valorization of lignin and presents an extensive survey on emerging applications of compounds derived from lignin in fine chemical production and bio-based polymer synthesis.

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