Dolomite와 NH<SUB>4</SUB>Cl의 반응

이건직; 김원배; 김재용; 유영홍

HWAHAK KONGHAK, Vol.31, No.3, 263-271, June, 1993

Export Citation

Dolomite와 NH₄Cl의 반응

The Reaction of Dolomite with NH₄Cl

이건직, 김원배, 김재용, 유영홍

초록

칼슘과 마그네슘은 세계적으로 폭넓게 분포되어 있는 광물로서 그 사용이 점차 증가되어 오고 있다. 이와 같은 상황하에서, 칼슘과 마그네슘의 추출에 대한 새로운 공정개발과 반응생성물로부터 반응메카니즘에 대한 기본적 데이타 조사를 위해 dolomite와 NH₄Cl의 반응을 실행하였다. 여기서 dolomite와 NH₄Cl의 총괄 반응메카니즘은 CaMg（CO₃）₂+4NH₄Cl→MgCl₂+CaCl₂+4NH₃+2H₂O+2CO₂와 같다. 이 때 dolomite와 NH₄Cl 반응의 최적조건은 반응온도 450℃, 반응시간 30분, 무게비(NH₄Cl/Dolomite) 8.0, N₂ 유량 30 cm³/min, 평균입경 69 m에서 마그네슘과 ㅋ슘추출율은 각각 85.48%, 99.63%이었다.

Calcium and magnesium were widely distributed over the world and the use have been increased gradually. Under these circumstances, the reaction of dolomite with NH₄Cl was carried out to develop a new process for the extraction of calcium and magnesium and to find the fundamental data for the reaction mechanisms from the reaction products. The overall reaction mechanism was as follows : CaMg（CO₃）₂+4NH₄-Cl→MgCl₂+CaCl₂+4NH₃+2H₂O+2CO₂. And the optimum condition for the reaction of dolomite with NH₄Cl was as follows; reaction temp. : 450℃, reaction time : 30 min, weight ration(NH₄Cl/Dolomite) : 8.0, N₂ gas flow rate : 30cm³/min, particle size(av.) : 69 m. Under the above condition, dissolved magnesium and calcium was 85.48%, 99.63% reapectively.

[References]

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이칠우, 한국자원공학회 (1990)
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Hidehisa H, Gypsum Lime(146) (1977)
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Lynn S, Forrester RC, U.S. Patent, 3,792,153 (1974)
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Isihi T, Shimada S, Furuichi R, 공업화학 잡지, 74(10), 46 (1971)
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박기채, 정량분석화학, 탐구당 (1985)
KS E.3072

[1] Othmer K, "Encyclopedia of Chemical Technology," Vol. 12, 3rd Ed. (1984)

[2] 상기남, 김동학, 이동진, 한국의 광물, 자원개발연구소, 158, 160, 212 (1977)

[3] 이칠우, 한국자원공학회 (1990)

[4] Shreve RN, "Chemical Process Industries," 2nd ed., McGraw-Hill, Book, Company, 320-322 (1958)

[5] Yonemasa F, Torao F, Gypsum Lime(94) (1968)

[6] Chem. Eng. News, July, 17 (1970)

[7] Chem. Eng. News, May, 7 (1971)

[8] Hidehisa H, Gypsum Lime(146) (1977)

[9] John AD, "Lange's Handbook of Chemistry," (1985)

[10] Lynn S, Forrester RC, U.S. Patent, 3,792,153 (1974)

[11] Araten D, Korob F, Isr. J. Chem., 11(5), 661 (1973)

[12] Isihi T, Shimada S, Furuichi R, 공업화학 잡지, 74(10), 46 (1971)

[13] 이건직, 석사학위논문, 고려대학교 화학공학과 (1988)

[14] Kubaschewski O, Evans EL, Alcoch CB, "Metallurgical Thermochemistry," Pergamon Press (1967)

[15] Stull DR, Prophet H, "Janaf Thermochemical Tables," Washington (1971)

[16] Wicks CE, Block FE, "Thermodynamic Properties of 65 Elements Their Oxides, Halides, Carbides and Nitrides," Bulletin 605, Bureau of Mines, Washington (1963)

[17] Park YS, Lee CT, Yoo YH, HWAHAK KONGHAK, 24(4), 291 (1986)

[18] 박기채, 정량분석화학, 탐구당 (1985)

[19] KS E.3072