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Open AccessArticle

Adding Value to Waste Minerals in a Circular Economy Framework: Ochre-Derived Layered Double Hydroxide Catalysts in Fatty Acid Ketonisation

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Centre for Sustainable Chemical Processes, Department of Chemistry, Durham University, Durham DH1 3LE, UK
2
Department of Chemistry, Durham University, Durham DH1 3LE, UK
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Department of Earth Sciences, Durham University, Durham DH1 3LE, UK
*
Author to whom correspondence should be addressed.
Minerals 2019, 9(11), 681; https://doi.org/10.3390/min9110681
Received: 5 September 2019 / Revised: 28 October 2019 / Accepted: 1 November 2019 / Published: 4 November 2019
(This article belongs to the Section Environmental Mineralogy and Biogeochemistry)
Transforming waste materials into added-value products is critical for a sustainable and circular economy. Here, Mg/Fe layered double hydroxide (LDH) materials, with a Mg2+:Fe3+ ratio of 2, were successfully synthesized via the co-precipitation method from a dissolved acid mine drainage precipitate waste “ochre”, which is normally put to landfill. The prepared LDH materials were tested as a heterogeneous base catalyst to promote the production of the ketone, 12-tricosanone, from lauric acid, a component of plant oils, through a ketonic decarboxylation reaction, giving a circular economy route to catalysts for sustainable ketone production. The highest yield of the ketone observed was 80%. View Full-Text
Keywords: ochre; ketonic decarboxylation; layered double hydroxide; waste; circular economy ochre; ketonic decarboxylation; layered double hydroxide; waste; circular economy
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MDPI and ACS Style

Perera-Solis, D.D.; Pimlott, M.; Fidment, E.; Whiting, A.; Greenwell, H.C. Adding Value to Waste Minerals in a Circular Economy Framework: Ochre-Derived Layered Double Hydroxide Catalysts in Fatty Acid Ketonisation. Minerals 2019, 9, 681.

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