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무전해 도금법에 의한 흑연 - 동 복합 분말 제조에 관한 연구
이진영,한춘,주재백,오종기 ( Jin Young Lee,Choon Han,Jae Baek Ju,Jong Ki Oh ) 한국화학공학회 1994 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.32 No.1
The possibility of manufacturing the graphite-copper composite powder by the electroless plating method as well as effects of related variables on the deposition process have been examined. For the continuous coating of the copper layer, the activation of the surface of graphite particle was necessary and at least one minute of activation time was needed. Although initial concentrations of copper ions were found important on the initial reaction rate, they gave the same conversion at the final stage. Since the uniform coating could be achieved when the initial concentration of copper ion was higher than 0.25 M/l, the thickness of copper layer could be controlled with the initial concentrations of copper ions. As the size of graphite particles became smaller, the amount of deposition was increased due to the larger surface area and active sites for the reduction of copper ions. Although the reaction occurred in the solution with the stoichiometric amounts of reactants, it could be accomplished with only a small amount of K-Na tartrate because of its repetitive participations during the reaction. An empirical equation was developed for the understanding and prediction of reaction rates, which gave the satisfactory results compared with the experimental data.
재생연 제련 부산물인 황산연으로부터 정제 질산연의 제조
이진영,한춘,신중극,김성규,이화영,오종기,Lee, Jin-Young,Han, Choon,Shin, Joong-Kuk,Kim, Saung-Gyu,Lee, Hwa-Young,Oh, Jong-Kee 한국자원리싸이클링학회 1998 資源 리싸이클링 Vol.7 No.2
2차납 제련공정에서 발생한 주성분이 황산납인 연진으로부터 고부가가치제품인 정제 질산납을 생산하는 습식공정을 개발하였다. 본 공정은 탄산염에 의한 탄산화 공정과 저농도 질산용액을 이용한 침출공정 및 정제 공정으로 구성되어 있으며 본 공정을 통하여 99%이상의 순도를 가진 질산납을 제조할 수 있었다. Hydrometallugical process was developed to produce the purified lead nitrate from lead dust mainly composed of lead s sulfate generated from lead-acid battery smelter as by-product. This process consisLed of carbonation process with carbonate s salts, leaching and purification processes. FmaJJy crude lead nitrate purified to produce high-purity product with over 99% Pb $(NO_3)_2$.
생활폐기물(生活廢棄物) 소각(燒却)바닥재의 재활용(再活用)을 위한 연구(硏究)
안지환,오명환,한춘,Ahn, Ji-Whan,Oh, Myung-Hwan,Han, Choon 한국자원리싸이클링학회 2008 資源 리싸이클링 Vol.17 No.1
국내의 생활폐기물의 처리 방법은 매립에서 소각으로 이동해 가고 있으며 이를 통하여 발생되는 소각재의 처리에 대한 비중이 점차적으로 증가하고 있다. 소각재는 90%가 바닥재로 존재하며, 바닥재는 재활용 가능한 성분을 함유하고 있기 때문에 재활용을 위한 활발한 연구가 필요하다. 예를 들어 미국과 유럽 그리고 일본의 경우 여러 분야에서 바닥재의 재활용이 이루어지고 있으며 이에 따른 환경적 경제적 효과를 얻고 있다. 하지만 이와 대조적으로 국내의 경우 소각재 관리 처리 시 대부분 매립에 의해 의존하고 있는 실정이다. 따라서 소각재의 발생특성과 성상을 조사 분석하고, 국내외의 소각재 안정화 및 재활용기술에 대한 기술조사와 평가를 기반으로 한 처리방안에 대한 연구가 절실히 요구된다. The treatment of domestic municipal solid waste has inclined to incineration process instead of disposal in landfills. So, the amount of ash generated by incineration of municipal solid waste is gradually increased. The incineration ash divides into bottom ash and fly ash. The bottom ash which accounts for about 90% of the incineration ash consists of ceramics, glasses and metals. And it can be used as the recycling product by the stabilization process. For example, the bottom ash is used as secondary building material or for other similar purposes such as road sub-bases and noise barrier in USA, Europe and Japan. But, the stabilization-treatment technique of bottom ash sti11leaves much to be desired in Korea. Thus, the domestic study of recycling about bottom ash must be improved through investigation about the chemical property and technique of stabilization.
MEK - 물 공비 혼합물의 공비증류에 관한 이론적 연구
김형규,이정석,한춘,나병기,정연수,송형근 ( Hyung Kyu Kim,Jung Seok Yi,Choon Han,Byung Ki Na,Yon Soo Chung,Hyung Keun Song ) 한국화학공학회 1995 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.33 No.2
MEK(methyl ethyl ketone) cannot be separated from water by normal distillation because of the presence of minimum boiling azeotrope. However it can be separated by azeotropic distillation by adding entrainer. The best entrainer was selected by considering the ratio between infinite dilute activity coefficients of each component for suggested entrainers and relative volatilities. From this method, acetone was selected as the best entrainer for the MEK-Water system. When the distillation tower was simulated by the UNIFAC equilibrium model for this MEK-Water-Acetone system, the minimum reflux ratio was observed as 0.6. Also, the optimum feed-plate was calculated at each reflux ratio for various amounts of entrainer. Results indicated the number of ideal plates decreases with the amount of entrainer. As the best results, 13 ideal plates were required to obtain 95 mole% of MEK as the bottom product from 70 mole% of MEK of the MEK-Water solution when the reflux ratio and the ratio of entrainer to feed were 0.85 and 2, respectively. In this case, the optimum feed-plate location, which required the minimum number of ideal plates, was the eighth.