Author
Kwang-Joo Kim
Other affiliations: Agency for Defense Development
Bio: Kwang-Joo Kim is an academic researcher from Hanbat National University. The author has contributed to research in topics: Crystallization & Supersaturation. The author has an hindex of 17, co-authored 66 publications receiving 840 citations. Previous affiliations of Kwang-Joo Kim include Agency for Defense Development.
Papers published on a yearly basis
Papers
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TL;DR: In this paper, the metastable zone width is estimated by using models based on the fact that metastable zones width is determined by the nucleation mechanisms acting within a crystallizer.
114 citations
TL;DR: In this article, the authors examined how operating conditions affected the surface morphology by coating crystallization and found that higher supersaturation enhances cluster aggregation, which results in uniform coating on the HMX surface.
Abstract: HMX (cyclotetramethylene tetranitramine) was coated with NTO (3-nitro-1,2,4-triazole-5-one) by solution crystallization. Two-step coating crystallization was investigated to enhance coating morphology. The first coating process using HMX seed and the second coating process using HMX coated with NTO obtained from the first process were compared in terms of coating shape, coating surface, nucleation rate, metastable zone width, and interfacial energy. The objective of this study was to examine how operating conditions affected the surface morphology by coating crystallization. The parameters such as type of seed, concentration, and cooling rate were used in the crystallization process. Finally, the second coating process was found to achieve compact and uniform surfaces of NTO crystals coated on the HMX surface. It was found that higher supersaturation enhances cluster aggregation, which results in uniform coating on the HMX surface.
43 citations
TL;DR: In this paper, the solubility of 3-nitro-1,2,4-triazol-5-one in water was measured over the temperature range from 284.65 K to 367.55 K.
Abstract: The solubility of 3-nitro-1,2,4-triazol-5-one in water was measured over the temperature range from 284.65 K to 367.55 K. The results were correlated by an exponential equation. Densities of the aqueous solutions have been measured at temperatures from 308.15 K to 368.15 K and at mole fractions of 0.0027 to 0.014. The metastable zone width was measured for the evaluation of the nucleation rate. Results for the density and the metastable zone width were correlated by empirical equations.
35 citations
TL;DR: In this article, the authors used static melt crystallization to remove metallic impurities, such as nitric acid and acetic acid, from the spent acid etchant of semiconductor manufacturing plants.
Abstract: Spent acid etchant is the corrosive waste coming from the etching process of semiconductor manufacturing plants. This waste solution consists of phosphoric acid, nitric acid and acetic acid, and includes various toxic metallic impurities. In this work, the recovery of phosphoric acid from the waste etchant was conducted by removal of metallic impurities, nitric acid, and acetic acid, using static melt crystallization. The effect of cooling rate, amount of seeds, subcooling, and sweating on the distribution coefficient was investigated. Nitric acid and acetic acid were successfully removed by single-stage layer crystallization. The quantity of metallic impurities of the purified phosphoric acid was 1/1000 times smaller than that of the crude etchant.
29 citations
TL;DR: Experimental solubilities of cyclotrimethylenetrinitramine (RDX) in binary solvent mixtures, such as γ-butyrolactone + water, cyclohexanone+ water, N-methyl pyrrolidone + Water, and acetone +Water, were measured over the temperature range of 273.15 K to 363.15 k as discussed by the authors.
Abstract: Experimental solubilities of cyclotrimethylenetrinitramine (RDX) in binary solvent mixtures, such as γ-butyrolactone + water, cyclohexanone + water, N-methyl pyrrolidone + water, and acetone + water, were measured over the temperature range of 273.15 K to 363.15 K. The enthalpy of dissolution was determined experimentally from the solubility data.
28 citations
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TL;DR: In this paper, the authors reviewed the use of liquid antisolvent (LAS) for precipitation and stabilization of ultra-fine particles of poorly water soluble drugs, focusing on the strategies for controlling particle size, size distribution, and stabilisation of ultrafine particles using polymers and surfactants.
350 citations
TL;DR: This review presents concise accounts of various conventional and emerging Raman instrumentations including associated hyphenated tools of pharmaceutical interest, relevant application cases of Raman spectroscopy in early and late phase pharmaceutical development, process analysis and micro-structural analysis of drug delivery systems.
221 citations
TL;DR: A compendium of phase change enthalpies including fusion, vaporization, and sublimation was published in 2010 as mentioned in this paper, which included organic, organometallic, and a few inorganic compounds.
Abstract: A compendium of phase change enthalpies published in 2010 is updated to include the period 1880–2015. Phase change enthalpies including fusion, vaporization, and sublimation enthalpies are included for organic, organometallic, and a few inorganic compounds. Part 1 of this compendium includes organic compounds from C1 to C10. Part 2 of this compendium, to be published separately, will include organic and organometallic compounds from C11 to C192. Sufficient data are presently available to permit thermodynamic cycles to be constructed as an independent means of evaluating the reliability of the data. Temperature adjustments of phase change enthalpies from the temperature of measurement to the standard reference temperature, T = 298.15 K, and a protocol for doing so are briefly discussed.
191 citations
TL;DR: In this paper, the authors compare simulations and experiments between the classical temperature control approach developed in the 1970s with the concentration-control approach developed more recently, which uses attenuated total reflection-Fourier transform infrared (ATR-FTIR) spectroscopy and feedback control to follow a setpoint trajectory in the solution concentration as a function of temperature, results in reduced sensitivity of the product quality to certain disturbances.
175 citations
TL;DR: Papers and patents that deal with polymorphism and solvatomorphism and systems where the crystal structures of the substance are defined by different unit cells but where these unit cells differ in their elemental composition through the inclusion of one or molecules of solvent are summarized in an annual review.
157 citations