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Crystals
Special Issues
Feature Papers in Industrial Crystallization 2022-2023
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Feature Papers in Industrial Crystallization 2022-2023

A special issue of Crystals (ISSN 2073-4352). This special issue belongs to the section "Industrial Crystallization".

Deadline for manuscript submissions: closed (12 April 2023) | Viewed by 3287

Special Issue Editors

Prof. Dr. Heike Lorenz

E-Mail Website
Guest Editor
Max Planck Institute for Dynamics of Complex Technical Systems, 39106 Magdeburg, Germany
Interests: phase equilibria; crystallization kinetics; process monitoring & design; separation of fine chemicals, large scale industrial products and renewable resources; innovative crystallization-based separation concepts; enantiomers; natural products; multi-component mixtures
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Hongxun Hao

E-Mail Website
Guest Editor
1. National Engineering Research Center of Industrial Crystallization Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
2. School of Chemical Engineering and Technology, Hainan University, Haikou 570228, China
Interests: photocatalysis; production; crystallization
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The field of industrial crystallization is extremely diverse, uniting the activities of scientists and engineers in various disciplines such as chemistry, biotechnology, pharmacy, and thermal, chemical and process engineering. Their research compiles crystallization fundamentals, crystallization process monitoring, design and optimization, crystalline (and amorphous) product design, and related applications in the industrial production of solid products. The latter include, inter alia, drugs, food components, salts, metals, alloys and highly functionalized materials as composite and nanomaterials as well. In addition, the prevention of crystallization relates to the field as there are crystallization scaling and corrosion in industrial systems. The increasing importance of sustainability and environmentally friendly processes in chemical and other process industries had led to the need for supporting crystallization specialists, for example, to recover valuable raw materials or to remove waste components from wastewaters.

The editorial board of the ‘Industrial Crystallization’ section of Crystals comprises a group of international distinguished scientists and engineers collaborating with other outstanding researchers worldwide. In this Special Issue, we collect articles from the members of our section board and other well-respected colleagues that cover a variety of current subjects in industrial crystallization research.

Prof. Dr. Heike Lorenz
Prof. Dr. Hongxun Hao

Guest Editors

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 special issue 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. Crystals 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

  • phase equilibria
  • crystallization kinetics
  • process monitoring and control
  • crystalline/amorphous products
  • nanocrystals
  • mixed crystals (solid solutions)
  • crystallization techniques
  • membrane crystallization
  • freeze concentration
  • separation and purification
  • multicomponent mixtures
  • isomer separation
  • downstream processes

Published Papers (2 papers)

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Research

14 pages, 4752 KiB  
Article
The Effect of Solvents on the Crystal Morphology of Pyriproxyfen
by Xiaoyang Yan, Na Wang, Xiongtao Ji, Yaoguang Feng, Jun Li, Ting Wang, Xin Huang and Hongxun Hao
Crystals 2023, 13(2), 195; https://doi.org/10.3390/cryst13020195 - 22 Jan 2023
Cited by 1 | Viewed by 1114
Abstract
To obtain crystal products with ideal morphology and better quality, it is important to fully understand and grasp the affecting mechanism of solvents on crystal morphology. In this work, the interactions between solvent/solute molecules and different crystal faces of pyriproxyfen are investigated by [...] Read more.
To obtain crystal products with ideal morphology and better quality, it is important to fully understand and grasp the affecting mechanism of solvents on crystal morphology. In this work, the interactions between solvent/solute molecules and different crystal faces of pyriproxyfen are investigated by a combination of experiments and molecular simulations. It is found that pyriproxyfen crystals grow into a lamellar morphology in methanol and ethanol, while the crystal grows into a three-dimensional shuttle morphology in n-butanol and n-heptane. Molecular simulations reveal that the molecular arrangement of crystal faces makes the alcohol hydroxyl adsorption sites exposed in different degrees, and the (002) face is more sensitive to alcohol hydroxyl than other faces. The adsorption of alcohol hydroxyl groups hinders the growth of crystal planes, so (002) and (102) faces become the main crystal planes in methanol and ethanol, and the lamellar crystal is formed. The developed knowledge of the growth mechanism based on the interaction between the solvent and crystal interface can be conducive to the further optimization of the pyriproxyfen crystal products. Full article
(This article belongs to the Special Issue Feature Papers in Industrial Crystallization 2022-2023)
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22 pages, 7580 KiB  
Article
Interplay of Particle Suspension and Residence Time Distribution in a Taylor–Couette Crystallizer
by Matthias M. Etmanski, Max Breloer, Marius Weber, Gerhard Schembecker and Kerstin Wohlgemuth
Crystals 2022, 12(12), 1845; https://doi.org/10.3390/cryst12121845 - 16 Dec 2022
Cited by 3 | Viewed by 1550
Abstract
In small-scale continuous crystallization, particle suspension and residence time distribution are critical factors determining operability and product quality. Here, the Taylor–Couette crystallizer stands out for its high flexibility. Its characteristic vortex structure intensifies local mixing, thus improving the suspension and simultaneously narrowing the [...] Read more.
In small-scale continuous crystallization, particle suspension and residence time distribution are critical factors determining operability and product quality. Here, the Taylor–Couette crystallizer stands out for its high flexibility. Its characteristic vortex structure intensifies local mixing, thus improving the suspension and simultaneously narrowing the residence time distribution, whereby these effects can be adjusted by operating and design parameters. However, the operating window is limited by the prerequisite of sufficient particle suspension. In this study, we investigated the suspension behavior and its impact on the attainable liquid phase residence time distribution and the flow regimes observed. For this purpose, the just-suspended rotation rate was visually determined for different design and operating parameters. A correlation was regressed from experimental data, showing that this rotation rate was mainly affected by the radius ratio of the rotor and stator. In addition, the liquid phase residence time distribution was measured by tracer experiments in regions of sufficient suspension, validating a correlation from the literature. With a combination of both correlations, the design parameters of the apparatus can thus be optimized according to the goal of, for example, a narrow residence time distribution in the suspended state. Full article
(This article belongs to the Special Issue Feature Papers in Industrial Crystallization 2022-2023)
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