Abstract
The sustainability of processes to integrate in biochemical and thermochemical platforms is a key factor for the success of lignocellulose-based biorefineries. Production and separation of high added-value compounds from renewable resources are emergent areas of science and technology with relevance to both scientific and industrial communities. Lignin is one of the raw materials with high potential due to its chemistry and proprieties. One of the routes is the production of aromatic aldehydes, vanillin, and syringaldehyde, toward environmental friendly processes as oxidation with O2, including separation of products by membrane and ion exchange processes. In this chapter, the types, availability, and characteristics of lignins are described, as well as the current trends of some industrial producers and processors. A concise yet comprehensive revision of the literature on lignin oxidation research focusing vanillin and syringaldehyde is provided. Separation processes for recovery of the aldehydes are included closing with a design of reaction and separation integrated process for aldehydes production from lignin.
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