Resumo

BECERRA CHALA, Jaime Andres  e  VILLA HOLGUIN, Aída Luz. Separation of carvone by batch distillation from the mixture obtained from limonene oxidation. Rev.fac.ing.univ. Antioquia [online]. 2022, n.104, pp.118-128.  Epub 31-Mar-2023. ISSN 0120-6230.  https://doi.org/10.17533/udea.redin.20210848.

Limonene is the main constituent of citrus oils whose oxidation produces a set of fine chemical compounds such as carvone, carveol, and limonene 1,2-epoxide. This contribution reports the results of the experimental evaluation and computational simulation of carvone separation by fractional distillation from the reaction mixture. Carvone was obtained from limonene oxidation over a perchlorinated iron phthalocyanine supported on modified silica catalyst (FePcCl16-NH2-SiO2) and t-butyl hydroperoxide (TBHP) as oxidant. Both experimental and simulation results support that fractional distillation (in batch and continuous) is a suitable technique for concentrating carvone. However, in the presence of water, the formation of immiscible L-L phases makes the experimental separation of carvone more difficult. Simulation results of the batch distillation incorporating the NRTL-RK thermodynamic model indicate that if water, acetone, and t-butanol are previously removed from the reaction mixture, carvone composition can be enriched in the reboiler from 4% up to 50%, or around 86.5% if the removal is in a third distillate cut under vacuum conditions.

Palavras-chave : Essential oil; limonene; separation; simulation.

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