Synthesis of Juglone (5-Hydroxy-1,4-Naphthoquinone) in a Falling Film Microreactor

Photooxygenation of 1,5-dihydroxynaphthalene to Juglone was studied in a falling film microreactor. Moderate conversion rates of up to 31% were achieved after just 160 s of exposure to visible light. In contrast, batch reactions gave much lower conversions of up to 14% after a prolonged time period...

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Bibliographic Details
Published in:Journal of flow chemistry 2012-04, Vol.2 (2), p.52-55
Main Authors: Shvydkiv, Oksana, Limburg, Carolin, Nolan, Kieran, Oelgemöller, Michael
Format: Article
Language:English
Subjects:
Chemistry
Chemistry and Materials Science
Chemistry/Food Science
Green Chemistry
Industrial Chemistry/Chemical Engineering
Inorganic Chemistry
Nanochemistry
Organic Chemistry
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Summary:Photooxygenation of 1,5-dihydroxynaphthalene to Juglone was studied in a falling film microreactor. Moderate conversion rates of up to 31% were achieved after just 160 s of exposure to visible light. In contrast, batch reactions gave much lower conversions of up to 14% after a prolonged time period of 10 min. The difference in performance is explained by the superior light penetration in the microfilm and the large gas—liquid contact area.
ISSN:2062-249X
2063-0212
DOI:10.1556/jfchem.2012.00022