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Diol계(系) 추출제(抽出劑)에 의한 염수(鹽水) 중(中) 보론의 추출거동(抽出擧動) 연구(硏究)
윤미희,강동준,안전웅,민동준,Yoon, Mi-Hee,Kang, Dong-Jun,An, Jeon-Woong,Min, Dong-Joon 한국자원리싸이클링학회 2012 資源 리싸이클링 Vol.21 No.1
본 연구에서는 염수 중 보론의 최적 용매추출 조건 도출을 목적으로 diol계 TMPD(2,2,4-trimethyl-1,3-pentanediol)에 의한 보론 추출거동을 조사하였다. 0.736 g/L의 보론을 함유하고 있는 염수 용액을 시료로 하여 추출실험한 결과, 추출제 농도 0.75 mol/L, 두 상간의 부피비 1, 염수의 pH 3, 교반시간 20분, 추출온도 298 K에서 99% 이상의 추출율을 나타내었으며, 탈거반응의 경우, 수산화나트륨 농도 1 mol/L에서 99% 이상의 탈거율을 나타냄으로써 염수 중 잔존 보론 농도를 10 ppm 이하로 제어 가능하였다. 또한 실험 결과로부터 pH 6 이하에서 다음과 같은 추출평형 반응식을 도출할 수 있었다. log D = 1.7 log $[TMPD]_O$ + constant at pH < 6. A study on the behavior of boron extraction by TMPD(2,2,4-trimethyl-1,3-pentanediol) was carried out to find the optimum conditions for the boron extraction from brine. In case of boron extraction from 0.736 g/L boron-containing brine, typical optimum extractive conditions would be confirmed to be 0.75 mol/L of extractant concentration at 3.0 pH of brine with 1 of phase ratio and 20 min. of shaking time at 298 K respectively. And 1 mol/L sodium hydroxide of stripping agent was shown above 99 % of boron extraction and stripping efficiencies. Also, extraction equilibrium equation were obtained through experiments as follows : log D = 1.7 log $[TMPD]_O$ + constant at pH < 6.
합성마그네타이트를 이용한 유상자성유체의 제조 및 분산특성
조명호,김만,민동준,오재현,Cho, Myeong-Ho,Kim, Mahn,Min, Dong-Joon,Oh, Jae-Hyun 한국세라믹학회 1996 한국세라믹학회지 Vol.33 No.8
The oil-based magnetic fluids were prepared with synthesized ultrafine magnette by allowing surfactactants such as sodium oleate and aliquat 336 to adsorb on the surface of magnetite particles. The dispersion ratio of oil-based magnetic fluids was higher than 90% when the amount of sodium oleate and aliqua 336 were more than 2.63$\times$10-2 mol and 6.56$\times$10-3 mol for 20g of magnetite respectively. The dispersion ratio of oil-based magnetic fluids with the amount of secondary surfactant addition was higher than 90% when oil-based magnetic fluids were prepared with aliquat 336 of cationic type. However oil-based magnetic fluids prepared with surfactants of anionic and nonionic type showed lower dispersion than whose with cationic surfac-tants.
문석민,김태욱,민동준,Moon Seok Min,Kim Tae Wook,Min Dong Joon 한국자원리싸이클링학회 2002 資源 리싸이클링 Vol.11 No.4
전기로 분진의 유해성을 제거하고 인공자원으로써의 가치를 활용하기 위하여 연구되고 있는 고온용융법을 이용한 전기로 분진의 처리공정에 있어서 유가금속 특히 아연의 환원 거동에 관한 연구를 속도론적인 측면에서 수행하였다. 전기로 분진의 구성 성분인 ZnO와 Franklinte의 환원 반응이 CO gas의 분압에 대하여 1차 반응인 chemical reaction에 의해 지배를 받음을 확인 할 수 있었다. ZnO와 Franklinite의 CO 가스에 의한 환원 반응에 있어서 활성화 에너지는 각각 44.95 kcal/mol, 4.9546 kcal/mol로 나타나 화학반응 단계가 전체 반응의 율속 단계임을 알 수 있었다. As the consumption of galvanized steels in cans and automobiles and the quantity of scraps increase, the recycling problems of EAF dust become a important problem. Valuable metals such as Fe, Zn, Pb are of continued interest to metallurgists. To recover the valuable metal and to remove the toxicity of EAF dust, high temperature smelting process is or researching as a pilot scale. The Reduction kinetics of Zn in EAF dust is so important in a view of the economic consideration of the process. In this study, the kinetics behavior of Zn in EAF dust were measured as a point of application in high temperature smelting process. The rate control step in ZnO and franklinite is revealed to be chemical reaction on the reaction surface.
논문 : 건식제련 ; 고체탄소에 의한 철광석의 용융환원 반응속도론
이재철 ( Jae Cheol Lee ),민동준 ( Dong Joon Min ),김성수 ( Sung Soo Kim ) 대한금속재료학회 ( 구 대한금속학회 ) 1996 대한금속·재료학회지 Vol.34 No.11
Kinetics of the smelting reduction of iron ore by the graphite crucible and the carbon-saturated molten iron was investigated between 1400℃ and 1550℃. At 1500℃. by the graphite crucible, the reduction rate of iron ore was found to be 8.88 × 10-5mol/cm2·sec, and by the molten iron, 8.25 × 10-5mol/cm2·sec. The activation energies for the reduction by the graphite crucible and the molten iron were 24.1kcal/mol and 22.9kcal/mol, respectively. For the smelting reduction by the graphite crucible, it was found from the comparison of each elementary reaction rate that the overall reaction was controlled by the chemical reaction(C+CO2=2CO) between carbon in the carburized iron and CO2 gas. Based on the results of present research and X-ray fluoroscopic observation, it could be concluded that these two reduction reactions of iron ore by the graphite crucible and the molten iron are essentially the same.