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Feature Paper Collection in Section 'Purification Technology'
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Feature Paper Collection in Section 'Purification Technology'

A topical collection in Separations (ISSN 2297-8739). This collection belongs to the section "Purification Technology".

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Editors

Dr. Ki Hyun Kim

E-Mail Website
Collection Editor
Natural Product Research Laboratory, School of Pharmacy, Sungkyunkwan University, 2066, Seobu-ro, Jangan-gu, Suwon 16419, Republic of Korea
Interests: discovery and structural elucidation of natural products; metabolomics of natural products
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Jae Sik Yu

E-Mail Website
Collection Editor
Department of Integrative Biological Sciences and Industry, Sejong University, Seoul 05006, Republic of Korea
Interests: natural products; natural product chemistry; metabolomics; phytochemistry; drug discovery

Topical Collection Information

Dear Colleagues,

Separations has launched a new Topical Collection "Feature Paper Collection in Section 'Purification Technology'" to promote the publication of high-quality original research and review articles on basic and applied analytical and purification technology. This Topical Collection is dedicated to publishing experimental studies and theoretical analyses of phenomena arising from separation and purification, as well as process development. Preparation and modification of materials used in separation and/or purification can be considered. This Topical Collection also welcomes contributions to novel methods for separation and purification in chemical and environmental engineering. The purification technology includes any separation and/or purification of liquids, vapors, and gases, with the exception of methods intended for analytical purposes.

Contributions to this Topical Collection should be always related to new or improved separation methods or principles. Research articles aiming at solving separation problems encountered in emerging technologies including biotechnology and green technology will also be welcome. Review papers should provide a critical assessment of the state of the art in a specific topic related to novel technologies in separation and purification. All manuscripts will undergo a rigorous peer-review process to be considered for publication in this Topical Collection.

Prof. Dr. Ki Hyun Kim
Prof. Dr. Jae Sik Yu
Collection Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the collection website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Separations is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • natural product chemistry
  • isolation
  • HPLC purification
  • structural elucidation using NMR data
  • medicinal plant
  • mushroom metabolites

Published Papers (4 papers)

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2024

Jump to: 2023

13 pages, 4485 KiB  
Article
Study on the Efficiency of Fine Particle Removal in a Single-Tower Dual-Cycle Desulfurization Process Utilizing Heterogeneous Condensation
by Rui Zhang, Zulpher Ahmad Mnipela, Linjun Yang and Xiaodong Si
Separations 2024, 11(7), 192; https://doi.org/10.3390/separations11070192 - 21 Jun 2024
Viewed by 819
Abstract
This study investigated a new method for controlling the emission of fine particles through heterogeneous condensation. Specifically, the research focuses on the application of single-tower double-cycle desulfurization technology in the wet flue gas desulfurization process. The establishment of a supersaturation environment necessary for [...] Read more.
This study investigated a new method for controlling the emission of fine particles through heterogeneous condensation. Specifically, the research focuses on the application of single-tower double-cycle desulfurization technology in the wet flue gas desulfurization process. The establishment of a supersaturation environment necessary for heterogeneous condensation was achieved by reducing the temperature of desulfurization slurry in the oxidation zone. Numerical simulations were used to study the distribution of the supersaturation degree and fluid dynamics characteristics in the desulfurization tower after the cooling of desulfurization slurry. Furthermore, the impact of single-tower double-cycle technology on the removal efficiency of fine particles was examined. The results of the numerical simulations indicate that cooling the desulfurization slurry in the absorption zone could establish a supersaturated vapor environment, with the supersaturation degree and region increasing as the slurry temperature decreases. Under typical operating conditions, a temperature drop of approximately 8~10 °C was found to be most suitable for the desulfurization slurry. Moreover, lowering the temperature of the desulfurization slurry in the absorption zone increases the supersaturation degree from 0.93 to 1.85. Additionally, the use of single-tower double-cycle desulfurization technology is shown to significantly enhance the removal efficiency of fine particles, particularly those within the particle size range of 0.1~1 μm. Ultimately, this method could increase the removal efficiency of fine particles from 39.9% to 57.9%. Full article
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2023

Jump to: 2024

10 pages, 1515 KiB  
Article
Separation of (2E,4E)-deca-2,4-dienal from a Biocatalytic Reaction Mixture Using Hydrophobic Adsorbents
by Marta Ostrihoňová, Monika Antošová, Hana Dobiašová, Justína Čuchorová, Kvetoslava Vranková and Milan Polakovič
Separations 2023, 10(8), 431; https://doi.org/10.3390/separations10080431 - 29 Jul 2023
Viewed by 1264
Abstract
Biocatalytic oxidation of a fatty acid preparation by enzymes released from a plant extract provided (2E,4E)-deca-2,4-dienal (2,4-DDAL), a valuable natural aroma. The post-reaction mixture contained several other compounds, from which 2,4-DDAL must be recovered. These included the main by-product trans-2-hexenal (2-HAL) and the [...] Read more.
Biocatalytic oxidation of a fatty acid preparation by enzymes released from a plant extract provided (2E,4E)-deca-2,4-dienal (2,4-DDAL), a valuable natural aroma. The post-reaction mixture contained several other compounds, from which 2,4-DDAL must be recovered. These included the main by-product trans-2-hexenal (2-HAL) and the unreacted substrate composed mainly of linoleic, palmitic, and oleic acids. The adsorption capacity and selectivity of 17 hydrophobic adsorbents were examined in batch equilibrium experiments. The highest binding capacity for 2,4-DDAL was around 30 mg/g. Due to a large excess of fatty acids in the mixture, the total adsorbed amounts of other components analyzed reached the values up to 150 mg/g. In addition, 2-HAL was always adsorbed more strongly than 2,4-DDAL, whereas fatty acids were mostly not adsorbed as effectively. The best-performing adsorbent, AmberLite FPX66, had a selectivity ratio of 6 for 2,4-DDAL with respect to the key impurity and linoleic acid. Ethanol, isopropanol, and acetone were examined as potential desorbents using batch adsorption experiments on AmberLite FPX66 from 2,4-DDAL solutions in organic solvents. Ethanol was found to be the best choice. Based on the batch equilibrium data, a column elution experiment was performed to purify 2,4-DDAL from the biocatalytic reaction mixture using elution with 96% ethanol. Full article
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10 pages, 1702 KiB  
Communication
Isolation and Structural Elucidation of Unreported Prenylhydroquinone Glycoside from Sedum kamtschaticum Leaves and Its Effect on Hyperphosphorylated Tau Production in Aβ1–42-Treated SH-SY5Y Cells
by Seung-Eun Lee, Se Yun Jeong, Yoon Seo Jang, Kwang-Jin Cho, Jeonghoon Lee, Yunji Lee and Ki Hyun Kim
Separations 2023, 10(8), 428; https://doi.org/10.3390/separations10080428 - 28 Jul 2023
Viewed by 1241
Abstract
Sedum kamtschaticum Fischer, of the Crassulaceae family, is a perennial and medicinal plant used in Asian folk medicine to alleviate inflammatory disease and improve blood circulation. As part of our ongoing exploration into natural products, seeking to identifying bioactive compounds, we characterized, identified, [...] Read more.
Sedum kamtschaticum Fischer, of the Crassulaceae family, is a perennial and medicinal plant used in Asian folk medicine to alleviate inflammatory disease and improve blood circulation. As part of our ongoing exploration into natural products, seeking to identifying bioactive compounds, we characterized, identified, and isolated an unreported bioactive compound, prenylhydroquinone glycoside (1), which we named kirinchoside from S. kamtschaticum leaves. Using high-resolution (HR)-ESIMS, NMR spectroscopic data, and enzymatic hydrolysis, followed by LC–MS analysis, we determined the structure of this isolated compound. Despite a previous report on the planar structure of compound 1 (kirinchoside), the absolute configuration of 1 had not been verified. We investigated the effects of kirinchoside on hyperphosphorylated tau (p-tau) accumulation, a hallmark of Alzheimer’s disease (AD) progression. We observed that treatment with 5 μM kirinchoside suppressed p-tau levels by 16.9% in amyloid β (Aβ)1–42-treated SH-SY5Y cells, compared to the negative control. These findings indicate that kirinchoside, an unreported prenylhydroquinone glycoside found in S. kamtschaticum leaves, could be a candidate preventive agent against AD via inhibition of p-tau accumulation. Full article
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Graphical abstract

17 pages, 1070 KiB  
Article
Particle Cut Diameter Prediction of Uniflow Cyclone Systems with Fuzzy System Analysis
by Vinzenz Klapper, Giovanni Luzi, Benedict Prah and Antonio Delgado
Separations 2023, 10(6), 345; https://doi.org/10.3390/separations10060345 - 5 Jun 2023
Cited by 1 | Viewed by 2706
Abstract
Cyclones are devices used in various industries to remove particulate matter from gases and liquids. Commonly used in the power generation, cement, and mining industries, cyclones improve the efficiency and longevity of equipment by removing dust and other small particles that can cause [...] Read more.
Cyclones are devices used in various industries to remove particulate matter from gases and liquids. Commonly used in the power generation, cement, and mining industries, cyclones improve the efficiency and longevity of equipment by removing dust and other small particles that can cause wear and damage. Among centrifugal separation, reverse-flow cyclones are primarily used for particle separation, which can reach heights of several meters on an industrial scale and therefore, are difficult to access for maintenance. A uniflow centrifugal segregation system avoids these drawbacks of reverse-flow cyclones since their accessibility is good and their height usually does not exceed their diameter. The efficiency is a critical aspect of separating systems. This study systematically examines the collection efficiency for particles ranging from 1 μm to 29 μm in diameter based on varying vane angles of the swirl inducer at flow rates ranging from 130 Ls−1 to 236 Ls−1. Full article
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