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Utilizing melt crystallization fundamentals in the development of a new tabletting technology

Ahmed ABOUZEID,Sandra PETERSEN,Joachim ULRICH

Frontiers of Chemical Science and Engineering 2014, Volume 8, Issue 3,   Pages 346-352 doi: 10.1007/s11705-014-1443-9

Abstract: Increasing production effeciency and lowering costs are some of the many advantages melt crystallizationMelt crystallization is a purification (separation) process.

Keywords： phase separation     melt crystallization     tablets     process optimization    

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Permeability analysis and seepage process study on crystal layer in melt crystallization with fractal

Xiaobin JIANG, Baohong HOU, Yongli WANG, Jingkang WANG

Frontiers of Chemical Science and Engineering 2011, Volume 5, Issue 4,   Pages 435-441 doi: 10.1007/s11705-011-1139-3

Abstract: In this paper a porous media seepage model was applied to analyze the permeability and study the seepage process of crystal pillar formed in the preparation of electronic grade phosphoric acid (EGPA). By inspecting the seeping process, the structure parameter of crystal pillar could be obtained. Two basic ideal models (perfectly separated model and perfectly connected model) were presented and a characterized factor was introduced to modify the model. A good simulation result was obtained which met the experiment result well. The relationship between and permeability were also discussed. The characterized factor showed potential application on optimizing process.

Keywords： melt crystallization     porous media     fractal     permeability     hyperpure material     simulation    

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Kinetic roughening transition and missing regime transition of melt crystallized polybutene-1 tetragonal

Motoi YAMASHITA

Frontiers of Chemical Science and Engineering 2009, Volume 3, Issue 2,   Pages 125-134 doi: 10.1007/s11705-009-0001-3

Abstract: The morphology and lateral growth rate of polybutene-1 ( -PB1) have been investigated for crystallizationfrom the melt over a wide range of crystallization temperatures from 50 to 110°C.The morphology of -PB1 crystals is a rounded shape at crystallization temperatures lower than 85°C,while lamellar single crystals possess faceted morphology at higher crystallization temperatures.The nucleation and growth mechanism for crystallization does not work below 85°C, since the growth face

Keywords： isotactic polybutene-1     tetragonal phase (form Ⅱ)     melt crystallization     growth rate     kinetic    

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Simulation of cottonseed cake melt flow in metering zone of a single screw extruder

Hong HE, Jianguo ZHOU,

Frontiers of Chemical Science and Engineering 2010, Volume 4, Issue 3,   Pages 263-269 doi: 10.1007/s11705-009-0276-4

Abstract: relatively new due to the complex physicochemical transformations of raw materials, although plastics melt

Keywords： quasi-three-dimensional     rheological     viscosity     processing     influence    

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Lamellar thickness transition of melt-crystallized polybuten-1 tetragonal phase: configurational change

Motoi YAMASHITA

Frontiers of Chemical Science and Engineering 2009, Volume 3, Issue 1,   Pages 26-32 doi: 10.1007/s11705-009-0002-2

Abstract: Lamellar crystal thickness of isotactic polybutene-1 ( -PB1) have been investigated for crystallizationin the melt over a wide range of crystallization temperature from 40°C to 90°C by small angle X-ray

Keywords： isotactic polybutene-1     tetragonal phase     crystal thickness     melt growth     chain folding     small angle X-ray    

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Progress in membrane distillation crystallization: Process models, crystallization control and innovative

Xiaobin Jiang, Linghan Tuo, Dapeng Lu, Baohong Hou, Wei Chen, Gaohong He

Frontiers of Chemical Science and Engineering 2017, Volume 11, Issue 4,   Pages 647-662 doi: 10.1007/s11705-017-1649-8

Abstract: Membrane distillation crystallization (MDC) is a promising hybrid separation process that has been appliedprogress has been made in MDC technologies including the promotion of nucleation and better control of crystallizationThis review focuses on the development of MDC process models and on crystallization control strategies

Keywords： membrane distillation crystallization     mathematics model     nucleation     separation     hybrid process    

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Effects of a structurally related substance on the crystallization of paracetamol

Ali SALEEMI, I.I. ONYEMELUKWE, Zoltan NAGY

Frontiers of Chemical Science and Engineering 2013, Volume 7, Issue 1,   Pages 79-87 doi: 10.1007/s11705-013-1308-7

Abstract: Paracetamol (PCM) was crystallized from an isopropanol (IPA) solution containing various small amounts of metacetamol as an additive. The effect on the nucleation kinetics was studied by measuring the induction time to nucleation and the metastable zone width using focused beam reflectance measurements (FBRM) and attenuated total reflectance (ATR-UV/Vis) spectroscopy. Both the induction time and the metastable zone width were expressed as functions of the additive concentration. Small amounts of metacetamol (1–4 mol-%) were found to cause significant inhibition to the nucleation by extending both the induction time and the metastable zone width. A progressive change in the morphology of the paracetamol crystals from tabular to columnar habit was observed with increasing metacetamol concentration. The solvent also had a significant effect on the size of the paracetamol crystals as smaller crystals were obtained in IPA than in aqueous solution. The dissolution rate of paracetamol was improved by the incorporation of metacetamol with 4 mol-% having the most effect. A supersaturation control (SSC) approach was implemented for the PCM-IPA system with and without metacetamol in an attempt to control and obtain larger metacetamol-doped paracetamol crystals.

Keywords： acetaminophen     metacetamol     crystallization     metastable zone width     induction time     supersaturation control    

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Interfacial induction and regulation for microscale crystallization process: a critical review

Frontiers of Chemical Science and Engineering 2022, Volume 16, Issue 6,   Pages 838-853 doi: 10.1007/s11705-021-2129-8

Abstract: Microscale crystallization is at the frontier of chemical engineering, material science, and biochemicalstructure and cavities, pore shape and pore size, surface porosity, channels), in various microscale crystallizationfuture research and development directions are outlined to emphasize the importance of interfacial crystallization

Keywords： interfacial crystallization     heterogeneous nucleation     supersaturation     micro/nanostructure     process    

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In-Vessel Melt Retention of Pressurized Water Reactors: Historical Review and Future Research Needs Review

Weimin Ma, Yidan Yuan, Bal Raj Sehgal

Engineering 2016, Volume 2, Issue 1,   Pages 103-111 doi: 10.1016/J.ENG.2016.01.019

Abstract:

A historical review of in-vessel melt retention (IVR) is given, which is a severe accident mitigationfrom the back-fitting of the Generation II reactor Loviisa VVER-440 in order to cope with the core-meltThe most influential phenomena on the IVR strategy are in-vessel core melt evolution, the heat fluxesFor in-vessel melt evolution, past focus has only been placed on the melt pool convection in the lowerpool formation, may all contribute to the final state of the melt pool and its thermal loads on the

Keywords： Pressurized water reactor     Severe accident     In-vessel melt retention     Debris formation     Debris remelting     Melt pool formation     Melt pool thermal-hydraulics     Critical heat flux    

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The feasibility of coating by cooling crystallization on ibuprofen naked tablets

Fatima Mameri, Ouahiba Koutchoukali, Mohamed Bouhelassa, Anne Hartwig, Leila Nemdili, Joachim Ulrich

Frontiers of Chemical Science and Engineering 2017, Volume 11, Issue 2,   Pages 211-219 doi: 10.1007/s11705-017-1619-1

Abstract: Recently, a new process of coating by cooling crystallization has been developed and applied on bisacodylpastilles obtained by melt crystallization.In this work, we investigated the feasibility of coating by cooling crystallization on ibuprofen “nakedbeen determined experimentally for the coating solution because they are essential factors for any crystallizationThe results show that naked tablet coating by cooling crystallization is feasible and can be applied

Keywords： coating     solution crystallization     ibuprofen tablets     sucrose    

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Premature melt solidification during mold filling and its influence on the as-cast structure

M. WU, M. AHMADEIN, A. LUDWIG

Frontiers of Mechanical Engineering 2018, Volume 13, Issue 1,   Pages 53-65 doi: 10.1007/s11465-017-0437-y

Abstract:

Premature melt solidification is the solidification of a melt during mold filling.The numerical model considers three phases, namely, air, melt, and equiaxed crystals.The crystals are assumed to have originated from the heterogeneous nucleation in the undercooled meltresulting from the first contact of the melt with the cold mold during pouring.These crystals can also be remelted by mixing with the superheated melt.

Keywords： premature solidification     mold filling     as-cast structure     modeling    

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Nucleic acid crystallization and X-ray crystallography facilitated by single selenium atom

Wen Zhang,Jack W. Szostak,Zhen Huang

Frontiers of Chemical Science and Engineering 2016, Volume 10, Issue 2,   Pages 196-202 doi: 10.1007/s11705-016-1565-3

Abstract: However, the crystallization and phase determination are the major bottle-neck problems in crystallographystrategies to solve the phase determination problem, but also offer a potential strategy to explore crystallization

Keywords： selenium     DNA     RNA     nucleic acid     crystallization    

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Preparation and crystallization kinetics of micron-sized Mg(OH)

Xingfu SONG, Kefeng TONG, Shuying SUN, Ze SUN, Jianguo YU

Frontiers of Chemical Science and Engineering 2013, Volume 7, Issue 2,   Pages 130-138 doi: 10.1007/s11705-013-1332-7

Abstract: Furthermore, the crystallization kinetics based on the population balance theory was studied to provide

Keywords： magnesium hydroxide     precipitation     micron-sized     crystallization kinetics    

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Applications of the crystallization process in the pharmaceutical industry

Sohrab ROHANI

Frontiers of Chemical Science and Engineering 2010, Volume 4, Issue 1,   Pages 2-9 doi: 10.1007/s11705-009-0297-z

Abstract: The applications of the crystallization technique in the pharmaceutical industry as a purification andexternal control in the form of feedback and real-time optimal control using cooling and antisolvent crystallizationTwo methods to prepare micron-sized drug particles, namely, micro-crystallization and polymer-coatedResolution of chloromandelic acid derivatives, a racemic compound, is achieved using direct crystallizationand diastereomeric salts crystallization.

Keywords： feedback     morphology     pulmonary     paracetamol     recognition    

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Importance of emulsions in crystallization—applications for fat crystallization

Sandra PETERSEN, K. CHALEEPA, Joachim ULRICH

Frontiers of Chemical Science and Engineering 2013, Volume 7, Issue 1,   Pages 43-48 doi: 10.1007/s11705-013-1309-6

Abstract: Emulsions and crystallization are two independent research topics which normally do not overlap althoughHere, the importance of emulsions in the field of fat crystallization is described.fractionation and phase change materials, emulsification can be applied as a tool to improve the fat crystallizationemulsification creates new application fields such as solid lipid nanoparticles in the area of fat crystallization

Keywords： emulsion     fat crystallization     phase change material     emulsion fractionation     emulsion solidification    

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Title Author Date Type Operation

Utilizing melt crystallization fundamentals in the development of a new tabletting technology

Ahmed ABOUZEID,Sandra PETERSEN,Joachim ULRICH

Journal Article

Permeability analysis and seepage process study on crystal layer in melt crystallization with fractal

Xiaobin JIANG, Baohong HOU, Yongli WANG, Jingkang WANG

Journal Article

Kinetic roughening transition and missing regime transition of melt crystallized polybutene-1 tetragonal

Motoi YAMASHITA

Journal Article

Simulation of cottonseed cake melt flow in metering zone of a single screw extruder

Hong HE, Jianguo ZHOU,

Journal Article

Lamellar thickness transition of melt-crystallized polybuten-1 tetragonal phase: configurational change

Motoi YAMASHITA

Journal Article

Progress in membrane distillation crystallization: Process models, crystallization control and innovative

Xiaobin Jiang, Linghan Tuo, Dapeng Lu, Baohong Hou, Wei Chen, Gaohong He

Journal Article

Effects of a structurally related substance on the crystallization of paracetamol

Ali SALEEMI, I.I. ONYEMELUKWE, Zoltan NAGY

Journal Article

Interfacial induction and regulation for microscale crystallization process: a critical review

Journal Article

In-Vessel Melt Retention of Pressurized Water Reactors: Historical Review and Future Research Needs

Weimin Ma, Yidan Yuan, Bal Raj Sehgal

Journal Article

The feasibility of coating by cooling crystallization on ibuprofen naked tablets

Fatima Mameri, Ouahiba Koutchoukali, Mohamed Bouhelassa, Anne Hartwig, Leila Nemdili, Joachim Ulrich

Journal Article

Premature melt solidification during mold filling and its influence on the as-cast structure

M. WU, M. AHMADEIN, A. LUDWIG

Journal Article

Nucleic acid crystallization and X-ray crystallography facilitated by single selenium atom

Wen Zhang,Jack W. Szostak,Zhen Huang

Journal Article

Preparation and crystallization kinetics of micron-sized Mg(OH)

Xingfu SONG, Kefeng TONG, Shuying SUN, Ze SUN, Jianguo YU

Journal Article

Applications of the crystallization process in the pharmaceutical industry

Sohrab ROHANI

Journal Article

Importance of emulsions in crystallization—applications for fat crystallization

Sandra PETERSEN, K. CHALEEPA, Joachim ULRICH

Journal Article