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심해저 망간단괴의 황산암모늄 분해에 의한 유효 금속성분의 추출
이철태,오치훈,송연호,엄명헌 ( Chul Tae Lee,Chi Hoon Oh,Yeon Ho Song,Myeong Heon Um ) 한국화학공학회 1994 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.32 No.5
A reaction between deep-sea manganese nodule and (NH₄)₂SO₄ was carried out to find a new process for the extraction of manganese, cobalt, nickel and copper from deep-sea manganese nodule. Manganese nodule was decomposed with ammonium sulfate successfully and the effective components in manganese nodule such as manganese, cobalt, nickel and copper were extracted by water leaching of decomposed nodule. The optimum conditions of decomposition were as follows : the reaction temperature 500℃, (NH₄)₂SO₄ weight ratio manganese nodules 4.0, the reaction time 60 min. The proper conditions of water leaching of decomposed nodule were as follows : the leaching temperature 100℃, the leaching time 2 hr, amount of H₂O 200 ㎖. Under above conditions, manganese, copper, covalt and nickel in the nodule were extracted 99%. 99%, 93%, 90%, respectively.
K<sub>2</sub>Ti<sub>6</sub>O<sub>13</sub> whisker의 제조 공정에서 Potassium 및 Flux 성분의 회수
이철태,이진식,오치훈,김영명,Lee, Chul-Tae,Lee, Jin-Sik,Oh, Chi-Hoon,Kim, Young-Myoung 한국공업화학회 1996 공업화학 Vol.7 No.6
공업용 $TiO_2$, $K_2CO_3$, $K_2MoO_4$를 출발원료로 사용하여 소성법과 융제법에 의해 육티탄산칼륨 섬유를 합성하였다. 소성법의 경우 비등수로 처리한 후의 여액이 pH 9 이상의 알칼리성이 되므로 적절한 중화 처리가 필요하였으며, 칼륨 성분의 회수는 미량이므로 회수한다는 것이 경제적으로 부적합하였다. 또한 융제법의 경우 초생상 10g을 100ml로 10번 처리하였을 때 융제인$K_2MoO_4$, 중 Mo성분이 96.1%, K성분이 91.8%가 회수되었다. Potassium hexatitanate whisker was effectively prepared with calcination and flux method by using industrial $TiO_2$, $K_2CO_3$ and $K_2MoO_4$ as the starting materials. When it was synthesized by the calcination method, the filtrate after boiling water treatment was required a neutralization, as the pH of filtrate was higher than 9. Because K component was very small, recovery of K component was not economically suitable. In case of flux method, flux was recovered 96.1% of Mo component and 91.8% of K component at $K_2MoO_4$, for 10th treatment in boiling water of 100ml to 10g.
K2Ti6O13 whisker 의 제조 공정에서 Potassium 및 Flux 성분의 회수
이철태,이진식,오치훈,김영명 ( Chul Tae Lee,Jin Sik Lee,Chi Hoon Oh,Young Myoung Kim ) 한국공업화학회 1996 공업화학 Vol.7 No.6
공업용 TiO₂, K₂CO₃, K₂MoO₄를 출발원료로 사용하여 소성법과 융계법에 의해 육티탄산칼륨 섬유를 합성하였다. 소성법의 경우 비등수로 처리한 후의 여액이 pH 9 이상의 알칼리성이 되므로 적절한 중화 처리가 필요하였으며, 칼륨 성분의 회수는 미량이므로 회수한다는 것이 경제적으로 부적합하였다. 또한 융제법의 경우 초생상 10g을 100ml로 10번 처리하였을 때 융제인 K₂MoO₄중 Mo성분이 96.1%, K성분이 91.8%가 회수되었다. Potassium hexatitanate whisker was effectively prepared with calcination and flux method by using industrial TiO₂, K₂CO₃and K₂MoO₄ as the starting materials. When it was synthesized by the calcination method, the filtrate after boiling water treatment was required a neutralization, as the pH of filtrate was higher than 9. Because K component was very small, recovery of K component was not economically suitable. In case of flux method, flux was recovered 96.1% of Mo component and 91.8% of K component at K₂MoO₄ for 10th treatment in boiling water of 100ml to l0g.
송연호,오치훈,이철태 ( Yon Ho Song,Chi Hoon Oh,Chul Tae Lee ) 한국공업화학회 1996 공업화학 Vol.7 No.3
NH₄Cl을 염소화제로 사용하여 시약 PbS와 Pb함유 자연광물인 방연광의 염소화 반응에대해 조사하였다. 방연광의 적정 염소화 반응조건은 반응온도 425℃, 방연광에 대한 NH₄Cl의 무게비 4.0, 반응시간 2시간이었다. 이 조건하에서 방연광중의 PbS는 NH₄Cl에 의해 효과적으로 PbCl₂로 염소화되었으며 그 전화율은 90%였다. 방연광의 염소화 반응에서 염소화제로 사용한 NH₄Cl은 NH₃와 HCl로 효과적으로 분리되었으며 양론적으로 90%의 NH₃를 회수할 수 있었다. The chlorination of reagent PbS and natural ore galena with NH₄Cl was investigatedto find a new extraction metallurgical process of lead. The proper conditions for the chlorination of galena were that reaction temperature ; 425℃, NH₄Cl weight ratio to galena ; 4.0 and reaction time ; 2hrs. Under these conditions, PbS was successfully chlorinated to PbCl₂and the conversion was 90%. And also NH₄Cl was effectively decomposed and was separated NH₃and HCl. HCl was a chlorinating agent and 90% of NH₃was recovered through this chlorination reaction.