Analysis of ternary LLE data on increasing limonene solubility in water using alcohol as cosolvent

The essential oil (EO) quality can be enhanced by increasing the concentration of oxygenated compounds. This can be achieved by extracting terpenes from the oil. As terpenes are insoluble in water, alcohols are often added to increase the solubility. It is important to find a suitable co-solvent to...

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Bibliographic Details
Main Authors: Salleh, M. Zulhaziman M., Morgan, Mohamed Almoghazy, Hamid, Izni Atikah Abd, Jamaluddin, Mohd Faizan, Hizaddin, Hanee Farzana, Hayyan, Adeeb, Karagiannidis, Panagiotis
Format: Conference Proceeding
Language:English
Subjects:
Alcohol
Composition
Essential oils
Ethanol
Methanol
Miscibility
Phase equilibria
Solubility
Solvents
Terpenes
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Summary:The essential oil (EO) quality can be enhanced by increasing the concentration of oxygenated compounds. This can be achieved by extracting terpenes from the oil. As terpenes are insoluble in water, alcohols are often added to increase the solubility. It is important to find a suitable co-solvent to increase the efficiency of terpene extraction using water; this can be indicated by the miscibility (one phase) region in the water–cosolvent–terpene ternary diagram. In this work, three alcohols, i.e., methanol, ethanol and propanol, were selected as the cosolvents. The mutual solubility of water– methanol/ethanol/propanol–limonene is analysed through the phase equilibria generated from literature data and predicted by the Conductor-like Screening Model (COSMO-RS) programme. COSMO-RS was able to generate accurate LLE data at equilibrium based on the reported experimental feed compositions. The extraction efficiency of using an alcohol increased following the order of methanol
ISSN:0094-243X
1551-7616
DOI:10.1063/5.0165899