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RISS 인기검색어
- 검색키워드
- 저자 : 姜參龍 (검색결과 7 건)
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이한섭,강안수,강삼룡 明知大學校 産業技術硏究所 1984 産業技術硏究所論文集 Vol.3 No.-
Diffusion coefficients of dye was increased by adding organic components and electrolytes as solvent to dye-water system. We measured diffusion coefficients by treating the ternary system of dye-solvent-water as a pseudo-binary system of dye-water and solvent. All experiments were made with the diaphragm cell of Whatman 42 filter paper and sintered glass when solvent was organic components and electrolytes respectively. The experimental results showed that diffusion coefficients of dye nearly agreed with the approximate equation related to the solubility of dye. Diffusion coefficients of dye were increased when solubility of dye to the water was larger than that of organic component to the water. There was similar tendency between diffusion coefficients of orange Ⅱ and that of electrolyte when solvents were electrolytes. In order to increase diffusion coefficients of dye, electrolytes were more favorable than organic components as solvent. But in the case of urea as solvent, diffusion coefficients of orange Ⅱ were increased maximum seven times.
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김해성,강삼룡 明知大學校 産業技術硏究所 1984 産業技術硏究所論文集 Vol.3 No.-
The operating characteristics of a pulsed-plate extraction column was investigated by comparing the steady state concentration profiles to the theoretical values of diffusion model in ease that the organic solvent was continuous in a aqueous acetic acid solution - 30% MIBK kerosene extraction system. Experimental results conformed the validity of diffusion model and theoretical index of phase selection was induced on the basis of operating condition that seperation factor should be unity.
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Srx La₁_x Fe₃_y계의 결정학적 구조와 비화학양론에 관한 연구
여철현,편무실,강삼룡 明知大學校 産業技術硏究所 1984 産業技術硏究所論文集 Vol.3 No.-
The solid solutions of the ?? systems with χ=1.00, 0.75 and 0.50 are prepared from stoichiometric mixtures of carbonate (SrCO₃), nitrate (Fe (NO₃)₃·9H₂O) and oxide (La₂O₃) by heating at 1300℃ for three days. Crystallographic structures of the solutions are all simple cubic systems and the lattice parameters of the cubic unit cells are enlarged with the introduction of lantanium according to their X-ray diffraction analysis. The mixed valence state of two kinds of Fe ion in the ferrite systems is analyzed by the Mohr salt titration method. It is possible to produce the nonstoichiometric compounds such as ?? by the appropriate heating treatment of the solutions under atmospheric air or oxygen pressure for a long time. The crystallographic structure and the nonstoichiometric compositions of the ?? systems are discussed with relation to their physical properties.
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姜參龍 명지대학교 1976 明大論文集 Vol.9 No.-
本 硏究에서는 물에 不溶性인 含칼륨鑛物로써 칼륨含量이 比較的 낮은 명반석으로부터 K_2SO_4·(NH_4)_2SO_4 複合肥料의 製造條件을 검토하여, 다음과 같은 結果를 얻었다. ① Alunite를 燒成함에 있어서 첨가제로서 NaCl을 사용하면, 燒成온도를 약 100℃가지 低下시킬 수 있었다. ② 抽出 암모니아水의 최적 농도는 3 mole이고 最適倍率은 3∼4배이었다. ③ 과잉 NH_3의 回收를 爲해서는 4 mole의 H_2SO_4를 注加해 주는 것이 좋으며, 이때 K_2SO_4의 유리를 증진시켰다. ④ 抽出溫度는 60℃에서 2시간 정도면 充分하였다. This investigation was attempted to extract the Potash-Ammonia fertilyzer in most satisfactory yield form the domestic Alunite ore applying a best reaction conditions. It was found that almost all amount of K_2SO_4 was extracted in the forms of K_2SO_4·(NH_4)_2SO_4 mixture under such conditions. The experimental data to note are as follows. 1. In calcination of Alunite, the calcinated temperature could be downed by using NaCl solution as additive agents. 2. The Optimal concentration of Ammonia water was 3 mole/ℓ. 3. To recover of the excess NH_3, 4 moles of H_2SO_4 are needed, and the yield of K_2SO_4 was increased. 4. The extraction time needed was 2 hrs at 60℃
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1,3-Disubstituted Pyrido [2,3-d] Pyrimidinedione
류정욱,이기창,강삼룡 明知大學校 産業技術硏究所 1984 産業技術硏究所論文集 Vol.3 No.-
1,3-Disubstituted pyrido [2, 3-d] pyrimidine-2, 4-diones derivatives were synthesized by the following method A and B. Method A: 1-Substituted pyrido [2, 3,-d] pyrimidine-2, 4-diones were prepared by the reaction of 2-[N-substituted amino] nicotinic acid with urea at high temperature. On the other hand method B:1-Substituted pyrido [2, 3-d] pyrimidine-2 4-dione prepared by the reaction of 2-[N-substituted amino] nicotinamide with ethyl carbonate at low temperature. It was largely affected by catalyst and temperature that the synthesis of 2-[N-substituted amino] nicotinic acid as starting material, and amide of 2-[N-substituted amino] nicotinic and derivative was synthesized by the typical nucleophilic substitution of acyl halide. Considering the reaction time and temperature, however, it is clear that the method B is more efficient than the method A. The former requires only 2-3 hours of reaction time at 20-40℃, while the latter requires 7 hours at 180-200℃. Yields for two methods obtained were 60% all. Yields of 1, 3-disubstituted pyrido [2, 3-d] pyrimidine-2, 4-dione as object was obtained about 60% by the reaction of intermediate material with alkylated in the DMF solvent. It has been affirmed that the mechanism of reactions involved in synthesis was of nucleophilic substitution. The molecular structure, and molecular weight of 1, 3-disubstituted pyrido [2, 3-d] pyrimidine-2, 4-diones were confirmed by the analysis of physicochemical instrumentation such as IR, NMR, and Ms spectra, and the physical properties were examined.
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함현식,강삼룡 明知大學校 産業技術硏究所 1984 産業技術硏究所論文集 Vol.3 No.-
The aims of this paper are : (1) to review the techniques to measure the metal dispersion of the supported metal catalysts, (2) to review the experimental results of sintering of supported metal catalysts, (3) to present the methods used to correlate the sintering data, and (4) to discuss the mechanistic models proposed for the sintering process. The experimental results presented will be restricted to supported Group Ⅷ metals ; the majority of the data being for platinum supported on alumina or silica.
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片茂實,姜參龍,徐廷善 명지대학교 1972 明大論文集 Vol.5 No.-
The defect form of the iron oxide system is studied by analyzing the gravimetric analysis of a sample measured by using a quartz microbalance(in a temperature range from O℃ to 1,200℃ under oxygen Pressures from 10^2mmHg to 10^-4 mmHg The Y Values of the formula FeO_1+y, are corretly obtained by this means for various condition of temp erature and pressure The plots of log Y v, s log P0_2 (or log Y=1/nlog Po_2) show linearity and calculates from the slope of the plot is about 1/10 at 1,000℃ The most of physical properties of iron oxide system such as electrical conductivity oxidation mechanism and catalytic effect is also discussed with respect to the defect form or the Y values.
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