Production of Sodium Chloride Crystals of Uni-Modal Size Distribution by Batch Dilution Crystallization.

Doki, Norihito; Kubota, Noriaki; Yokota, Masaaki; Kimura, Souichiro; Sasaki, Shinji

doi:10.1252/jcej.35.1099

Cited by 53 publications

(46 citation statements)

References 11 publications

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“…Crystallization of sodium chloride was investigated in several works [1][2][3][4][5][6]. Scrutton and Grootscholten [1] studied growth and dissolution of cubic sodium chloride crystals in a laboratory fluidised bed cell.…”

Section: Introductionmentioning

confidence: 99%

Part 1: Kinetics and mechanism of the crystallization process

Linnikov¹

2005

Cryst. Res. Technol.

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The kinetics of spontaneous crystallization of sodium chloride from aqueous-ethanol solutions were studied. During the crystallization the electrical conductance and optical transmission of the supersaturated solutions were measured automatically. For monitoring of the total surface of growing potassium chloride crystals at the crystallization the turbidimetric method was used. The growth rate and activation energy were determined. The crystal growth rate was proportional to supersaturation. When the volume fraction of ethanol in solution increased from 14.85 to 29.72%, the activation energy of the growth process did not change and was about 50 kJ⋅mol -1. Aggregation of the crystals was found. The aggregation kinetics of the crystals may be described approximately by the famous Smoluchowski equation for coagulation of colloidal particles.

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Section: Introductionmentioning

confidence: 99%

Part 1: Kinetics and mechanism of the crystallization process

Linnikov¹

2005

Cryst. Res. Technol.

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“…One may assume that the solubility of salts is connected with dielectric constant of the medium. This is the same as saying addition of ethanol ( =24.6`) to an aqueous solution ( = 80) create supersaturation allowing to vary strongly the crystallization process conditions (Doki et al, 2002).…”

Section: Resultsmentioning

confidence: 95%

“…Crystallization of sodium chloride was investigated in several works (Birchall and Davey, 1981;Mohameed et al, 1997;Kubota et al, 2000;Al-Jubbouri andUlrich, 2001, 2002;Doki et al, 2002;Linnikov, 2004;2006a, b;2007). It was reported that the overall growth, dissolution rates and the surface integration step are linear with respect to supersaturation of solution (Mohameed et al, 1997;Al-Jubbouri andUlrich, 2001, 2002).…”

Section: Introductionmentioning

confidence: 99%

“…Linnikov (2007) investigated the spontaneous crystallization of sodium chloride from aqueous ethanol solutions, reported that the use of ethanol for inducing super saturation in solutions allowed varying strongly the crystallization process conditions. Doki et al (2002) crystallized sodium chloride from aqueous solution by adding pure ethanol (99 vol.% ethanol) or an ethanol-water (75-vol.% ethanol mixture as diluents).…”

Section: Introductionmentioning

confidence: 99%

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The role of dielectric constant in sodium chloride solution chemistry: Magnitude of super saturation

Khalil¹

2012

Int. J. Phys. Sci.

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The effect of ethanol addition to aqueous semi saturated NaCl solutions on the super saturation was studied. The amount of precipitated salt was found to increase as the percent of added ethanol increased. The rates of formation of precipitate were calculated and found to increase with decrease of the weighted average of the solvents mixture dielectric constant, , but levels out at  ≈ 50. The solubility of salt was then connected with the dielectric constant and a zero solubility was observed at  = 35. A magnitude of super saturation was defined for the measurement of solubility.

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“…Acetone was used as an anti-solvent to precipitate potassium sulfate from an aqueous solution (Jones et al, 1987) with the finding that small dilutions due to the anti-solvent improved the permeability of the crystal cake by reducing excessive nucleation. Anti-solvent crystallization has also been used to control particle size distribution during the crystallization of sodium chloride (Doki et al, 2002) and for the crystallization of paracetamol (Granberg et al, 1999;Fujiwara et al, 2002). The effect of agitation, feeding rate, and the evolution of the particle mean size has been reported for the anti-solvent crystallization of paracetamol with a water-acetone mixture (Yu et al, 2005).…”

Section: Future Applicationsmentioning

confidence: 99%

Cluster Kinetics of Phase Transitions: Applications to Innovative Technologies

McCoy

Madras

2008

Chemical Engineering Communications

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Phase transitions are critical in many of the new technologies of interest to chemical engineers. Applications to materials processing and pharmaceuticals manufacture are among the uses for phase transition dynamics investigated with the methods of population balance modeling for clustering processes. The underlying phenomenon of clustering occurs during condensation processes such as crystallization from solution. Self-assembly of molecules or supramolecules is likewise spontaneous clustering, often through non-covalent interactions. Vapor-liquid and solid-liquid condensations usually involve nucleation from a metastable state, accompanied by particulate growth and Ostwald ripening (with denucleation). The nucleation process is bypassed under certain conditions, such as in spinodal decomposition, glass transition, and gelation. It is proposed that the unifying concept for all these transformations is cluster kinetics and dynamics. Using population balance modeling, we outline how phase transition processes can be quantitatively modeled by cluster size distributions evolving in time. We also discuss how generic cluster processes apply to granular systems, synchronizing oscillators, and polymorphic transformations.

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Production of Sodium Chloride Crystals of Uni-Modal Size Distribution by Batch Dilution Crystallization.

Cited by 53 publications

References 11 publications

Part 1: Kinetics and mechanism of the crystallization process

Part 1: Kinetics and mechanism of the crystallization process

The role of dielectric constant in sodium chloride solution chemistry: Magnitude of super saturation

Cluster Kinetics of Phase Transitions: Applications to Innovative Technologies

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