Separation of D-Limonene and Other Oxygenated Compounds from Orange Essential Oil by Molecular Distillation and Fractional Distillation with a Wiped Film Evaporator
, David Antonio Flores-Méndez 2,*, Ángela Suárez-Jacobo 3, Lilia Guadalupe Torres-Martínez 1, Miriam Granados-Vallejo 3, Rosa Isela Corona-González 4, Guadalupe María Guatemala-Morales 3 and Enrique Arriola-Guevara 4,*
Round 1
Reviewer 1 Report
the authors in the introduction say that the problem of orange essential oil is oxidation, then the extraction of limonene is performed but the authors do not show if the fact to have remove the limonene really improve the quality of their oil........ I think that objectivations test are missing and have to be added.
On the simple chemical point of view one can think that limonene works like a antioxidant and protects the other molecules. Do you have less oxidation? more? What are the oxidized molecules after de molecular distillation as less limonene is present? Do you have performed a sensorial evaluation after distillation? the use of common antioxidant is more or less efficient after distillation? Do you have to use less antioxidant?
Author Response
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Reviewer 2 Report
The submission fractionated OEO by distillation: molecular and fractionated (hybrid), producing a D-Limonene-rich fraction. The fractionation of the OEO was carried out by molecular distillation and fractional distillation following, in both cases, a factorial design (23) with central points, considering as response variable the D-Limonene percentage in the distillate and the residue. According to the physicochemical characterization, the predominant optical isomer was dextrorotatory, where D-Limonene is the main component of OEO with 92.584%. For molecular distillation, the D-Limonene content was reduced to 47.964% in the residue or deterpenated fraction, while for fractional distillation was 86.779%. The submission is interesting and can be improved with consideration of the following comments and suggestions in the revision.
(1) Please add a graphic abstract and no more than 5 highlights to help readers understand better about the academic contributions of the submission.
(2) This manuscript was based on a lab experiment where most factors are not considered. If the method is applied in practice, what constraints may happen? Please clarify and explain it.
(3) Please explain the novelty of the submission, especially the methods, data or results.
(4) The following two articles can be referred.
Adding circularity to organic waste management: From waste to products through solid-state fermentation. https://doi.org/10.1016/j.resenv.2022.100062
Enhancing food security and environmental sustainability: A critical review of food loss and waste management. Resources, Environment and Sustainability, 2021, 4, https://doi.org/10.1016/j.resenv.2021.100023
Author Response
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Reviewer 3 Report
The study is relevant and assesses the evaluate the fractionation of orange essential oil by molecular distillation and use a hybrid fractional distillation prototype coupled with a Wiped Film Evaporator to compare the two separation technologies.
The Introduction is well-written, and the problem s well as the objectives of the study are well-presented.
In the Results and Discussion, the authors compared their results with previous studies, and a mini-review of other authors is presented.
The results was performed in deep statistic analysis.
The Conclusions are written based on the results.
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Reviewer 4 Report
The research article has an interesting topic: separating D-Limonene from oxygenated compounds. The abstract is well written.
This work can be considered for publication in Processes after improving certain aspects of the manuscript.
A small mistake should be corrected in the abstract after coupled mass needs to be introduced spectrometry.
Elements of scientific novelty should be presented in a detailed and convincing manner.
On page 3, 2.3 Identification and quantification of compounds by Gas chromatography-mass spectrometry
The description of the GC method must be corrected: the final temperature of the column 32600C, sample size at 0.2 uL, it is necessary to mention the injection type (direct, splitless/ split, and the ratio)
On page 5, 2.4 Statistical Analysis line from 193 to 197 the sentence is not clear, clarify it.
The scientific work discusses the separation of the Orange oil from a non-analytical point of view, but to improve the article, two chromatograms before and after distillation should be combined/ compared and included in the article (it is just a suggestion).
Author Response
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Reviewer 5 Report
Dear authors,
The introduction contains extensive information on the current knowledge regarding the technology of obtaining oxidation products from orange oil.
Material and methods: concise and clear, drawing legible and careful.
Results: well prepared statistics well chosen, presentation correct.
I suggest adding more recent publications to the discussion.
Thank you
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Round 2
Reviewer 2 Report
ok.
