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ZrO2와 황산염의 반응
The Reaction of ZrO2 with Sulfates
HWAHAK KONGHAK, August 1992, 30(4), 480-490(11), NONE
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Abstract
고순도의 ZrO2를 얻기 위한 방법으로서 (NH4)2SO4, NaHSO4 및 KHSO4 등의 황산화제인 ZrO2와의 반응을 조사하였다. 이들 황산화제 중 (NH4)2SO4와 NaHSO4는 아래와 같은 관점에서 가치있는 황산화제로 볼 수 있다. 즉 낮은 반응온도, 빠른 반응속도, 수용성생성물 그리고 적은 양의 황산화제의 사용을 들 수 있다. ZrO2와 각 황산화제의 반응에서 반응생성물은 최적조건에서 수용성복염인 2(NH4)2SO4ㆍZr(SO4)2, 2Na2SO4ㆍZr(SO4)2 그리고 2K2SO4ㆍZr(SO4)2이었다. 최적조건은 (NH4)2SO4의 경우는 반응온도 450℃, 몰비 5.00, 반응시간 10분이고, 이 때 전화율은 96.1%이며, NaHSO4ㆍH2O의 경우는 반응온도 425℃, 몰비 5 .00, 반응시간 5분이고 이 때 전화율은 99.8%이며, KHSO4의 경우는 반응온도 500℃, 몰비 5,00, 반응시간 10분이며 이 때 전화율은 97.6%이었다.
The reaction of ZrO2 with sulfating agents, such as (NH4)2SO4, NaHSO4 and KHSO4, were pri-marily investigated in order to produce high purity ZrO2. (NH4)2SO and NaHSO4 were found to be as the valuable sulfating agents in the view of following; low reaction temeperature, fast reaction rate, water soluble products, and small excess of sulfating agents. The reaction products in the reactions of ZrO2 with the sulfating agents were water soluble complex salts; 2(NH4)2SO4ㆍZr(SO4)2, 2Na2SO4ㆍZr(SO4)2 and 2K2SO4ㆍZr(SO4)2 at optimum conditions. The optimum conditions were reaction temp : 450℃, mole ratio : 5.00, reaction time : 10min conversion : 96.1% for (NH4)2SO4 reaction temp : 425℃, mole ratio : 5.00, reaction time : 5min, convert- sion : 99.8% for NaHSO4ㆍH2O, reaction temp : 500℃, mole retio : 5.00, reaction time : 10min, conversion : 97.6% for KHSO4.
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