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Recovery of Vanillin and Syringaldehyde from Lignin Oxidation: A Review of Separation and Purification Processes

Title
Recovery of Vanillin and Syringaldehyde from Lignin Oxidation: A Review of Separation and Purification Processes
Type
Another Publication in an International Scientific Journal
Year
2016
Authors
Maria Inês F. Mota
(Author)
FEUP
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Paula C. Rodrigues Pinto
(Author)
FEUP
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José Miguel Loureiro
(Author)
FEUP
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Alírio E. Rodrigues
(Author)
FEUP
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Journal
Vol. 45
Pages: 227-259
ISSN: 1542-2119
Publisher: Taylor & Francis
Indexing
Publicação em ISI Web of Science ISI Web of Science
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Scientific classification
FOS: Engineering and technology > Chemical engineering
CORDIS: Technological sciences > Engineering > Chemical engineering
Other information
Authenticus ID: P-00H-NVE
Abstract (EN): Lignin is an underexploited side-stream of pulp and paper industry and biorefineries, being used for energy production at mill site or as low value material for dispersants or binding applications. However, an integrated process of reaction and separation can be implemented for the production of high added-value monomeric phenolic chemicals such as vanillin and syringaldehyde. In this review, the main research advances in the recovery of vanillin and syringaldehyde resulting from oxidation of lignin are addressed, covering various separation methodologies namely liquid-liquid extraction, supercritical fluid extraction, distillation, crystallization, membrane separation, and adsorption. Studies in this area started in the early years of the 20th century, but in the last decades several processes have been suggested, mainly for vanillin separation. Finding the ultimate industrially feasible process is still a necessary task and this review points out the most promising technologies and sequence of processes.
Language: English
Type (Professor's evaluation): Scientific
No. of pages: 33
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