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손병청,임진남 한국화학공학회 1966 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.4 No.2
Vapor-liquid equilibrium data at atmospheric pressure were obtained for the acetic acid-water system containing magnesium nitrate, cupric nitrate or cadmium nitrate of various concentrations. These data were obtained with a view to ascertaining the possibility of separating acetic acid and water under condition of reversed relative volatility by extractive distillation with increasing salt concentration. The results show a considerable effect of magnesium nitrate or cudric nitrate addition, with a reversal taking place at approximately 10 weight % magnesium nitrate, and 11 weight % cupric nitrate in the liquid phase. A method of graphical representation which is facilitated the interpolation of salt concentration is proposed, and the data is examined by the simple empirical equation which correlates the salt effect.
孫秉淸 弘益大學校 1975 弘大論叢 Vol.7 No.-
The content of this paper is to present the formula to calculate easily the vapor pressure of liquid according to temperature and to estimate n satisfying equation (9) within ±5% error based on the experimental values ?? for the various groups of substances by means of digital computer, CDC 3200. In conclusion, the application ranges of the eq. (9) are summarized as follows: 1. P=10mmHg through 2 atm, a. For propanol, Butanol, and Pentanol, n=1.985 b. For Acetic acid, Propionitrile, and Butyronitrile, n=2.005 c. For Acetonitrile and capronitrile, n=2.015 d. For others, n=2.000 2. P=2 atm through 5 atm, for all materials, n=1.985 3. P=5 atm through 10 atm, n=1.970
메타크릴산 메틸과 디에탄올아민의 에스테르 교환반응에 대한 음이온 촉매의 영향
孫秉淸,朴根浩 弘益大學校 1987 弘大論叢 Vol.19 No.2
The transesterification between diethanolamine and methyl methacrylate was kinetically investigated in the presence of zinc compound catalysts at 120℃. The amount of reacted methyl methacrylate was measured by gas chromatography, and the reaction rate also measured from the amount of reactants under each catalyst. The transesterification was carried out in the first order with respect to the concentration of diethanolamine and methyl methacrylate, respectively. The over-all order was 2nd. The apparent rate constant(k') was found to obey first kinetics with respect to. the concentration of catalyst. It shows that according to an increase in basicity of anionic species the rate constant increase, and that a linear relationship exists between ln k and pKa.
진공 증착법에 의한 Eu ( TTA )3( phen ) 박막의 제작 및 특성 연구
손병청,김영관,황장환,권오관 한국유화학회 1998 한국응용과학기술학회지 Vol.15 No.1
Thin films of Eu(TTA)_3(phen), which was known to show red-light emitting properties, were deposited under various deposition condition. The thickness, surface morphology, and photoluminescence(PL) were measured with α-step profiler, Atomic Force Microscopy(AFM), and PL measurement apparatus. It was found that the thickness of Eu(TTA)_3(phen) film can be controlled precisely by adjusting the amounts of Eu(TTA)_3(phen) in the boat. As the thickness of these films increases, the surface roughness also increases. A structure of Al/Eu(TTA)_3(phen)*(50A°)/TPD(600A°)/ITO was fabricated, Electroluminescence(EL) spectrum of which shows the peak at the wavelength of 618nm.
金榮燦,鄭舜旭,孫秉淸 弘益大學校 科學技術硏究所 1995 科學技術硏究論文集 Vol.6 No.-
In this paper, cyan coupler was prepared by the reaction of 2-amino-4.6-dichloro-5-me-thylphenol with 2,4-ditirtiarypentyl-phenoxy-butyroyl chloride in the presence of pyridine. The product was identified by using various analytical tools such as melting point. Elemental analyzer. IR spectrophotometer. UV-Vis spectrophotometer Mass Spectrometer. The reaction of cyan coupler with CD-3(color development agent) was shown cyan color.
國産 Ilmenite를 利用한 Titanium Dioxide의 製造
林炳五,孫炳淸 弘益大學校 1972 弘大論叢 Vol.4 No.-
As a part of the study for the preparation of titanium dioxide from Ilmenite of Korean origin, we have studied several factors pertaining to sulfuric acid concentration, reaction temperature and the length of decomposition process with H₂SO₄, the rate of deironization with respect to the acid concentration, the reaction time and the pH of hydrolysis, and temperature of the calcination process, by using 10 grams of the ore sample at each experiment.
朴根浩,孫秉淸 弘益大學校 1980 弘大論叢 Vol.12 No.-
The transesterification has been investigated on the reaction of sucrose with ethylacetate, in N, N-dimethylformamide solvent, using anhydrous potassium carbonate and aluminum sulfate as a catalyst. The major product is confirmed as sucrose monoacetate by I.R. spectroscope and chemical analysis. Sucrose monoacetate has the similiar properties of sucrose besides less sweetness. From the Arrhenius plot the activation energies have been calculated as 9.8㎉/mole with K₂CO₃ and 12.9㎉/mole with Al₂(SO₄)₃, respectively. The catalytic activity of potassium carbonate is higher than that of aluminum sulfate. It is confirmed that the transesterification of sucrose with ethylacetate proceeds on the first order of reaction.