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전남석,변헌수 한국공업화학회 1998 응용화학 Vol.2 No.2
By the catalytic dehydration, these are obtained to the preparation of isobutyronitrile from isobutyl aldehyde with the various catalyst; platinum metal on activated carbon. palladium on activated carbon, zinc metal, AgNO₃, cobalt oxide, alumna-supported zinc oxide. The available catalyst was selected by the conversion ratio of the isobutyronitrile from isobutyl aldehyde over the atmosphere pressure at 150 and 300℃. By the experimental data, it is available for the preparation of this to alumina-supported zinc oxide as a catalyst. And it are available for this preparation with the selected catalyst to the temperature from 380 to 420 ℃.
고압에서 이성분 이산화탄소 - 에시드계에 대한 상거동 측정과 모델링
전남석,변헌수 한국공업화학회 1998 응용화학 Vol.2 No.2
Pressure-composition isotherms are obtained for the carbon dioxide -hexanoic acid and carbon dioxide-octanoic acid system at temperatures of 35, 55, 75 and 100℃ and for pressure range from 23 to 240 bar. The carbon dioxide-hexanoic acid and carbon dioxide-octanoic acid systems is determined near the critical point of pure carbon dioxide. These two carbon dioxide-polar acid systems have continuous critical mixture curves that exhibit maximums in pressure at temperatures between the critical temperatures of carbon dioxide and haxanoic acid or octanoic acid. The experimental data obtained in this study are modeled using the statistical associating fluid theory(SAFT) equation of state.
고무의 산화방지제인 N-(1,3-dimethylbuthyl)-N'-phenyl- p-phenylene-diamine의 제조 및 특성
변헌수,전남석 여수대학교 1998 論文集 Vol.13 No.2
We were studied to the preparation and the study of property of N-(1.3-dimethyl-butyl)-N'-phenyl-p-phenylene-diamine from diphenylamine by the various synthetic methods : nitrosoation, rearrangement, hydrogenation and reductive alkylation. In this study, we were obtained to the optimum conditions of reaction step and applied the obtained data in Lab. to plant. The data of Lab. test were as follows : the purity of p-amino-diphenylamine from diphenylamine was 97.0% and the yield of p-amino-diphenyl-amine from diphenylamine was 88.0%, the purity of N-(1.3-dimethylbutyl)-N'-phenyl-p-phenylene-diamine from diphenyl-amine was 98.5% and the yield of N-(1.3-dimethylbutyl)-N'-phenyl-p-phenylene-diamine from dipheny-lamine was 98.0%.
변헌수,전남석 여수대학교 1998 論文集 Vol.13 No.2
By the catalytic dehydration, these are obtained to the preparation of isobutyronitrile from isobutyl aldehyde with the various catalyst: platinum metal on activated carbon, palladium on activated carbon, zinc metal. AgNO₃, cobalt oxide, alumina-supported zinc oxide. The available catalyst was selected by the conversion ratio of the isobutyronitrile from isobutyl aldehyde over the atmosphere pressure at 150 and 300℃. By the experimental data, it was available for the preparation of this to alumina-supported zinc oxide as a catalyst. And it was available for this preparation with the selected catalyst to the temperature from 380 to 420℃.
p-Amino-diphenylamine으로부터 N-phenyl-N'-iospropyl-p-phenylene-diamine의 합성 및 특성
변헌수,전남석 여수대학교 1998 論文集 Vol.13 No.2
We were studied to the preparation and property of N-phenyl-N'-isopropyl-p-phenylene-diamine from p-amino-diphenylamine with the various type of precious metal catalyst : 3% platinum on activated carbon. 5% palladium on activated carbon. In this study, we were obtained to the optimum conditions of reaction step in Lab. The data of Lab test were as follows : the purity of N-pheny-N'-isoprophyl-p-phenylene-diamine from p-amino-diphenyl-amine was 97.0% and the yield of N-phenyl-N'-isoprophyl-p-phenylene-diamine from p-amino-diphenylamine was 97.5%.