| 000 | nam k | |
| 001 | 2210080037333 | |
| 005 | 20100222111342 | |
| 007 | ta | |
| 008 | 880110s1980 bnka m FB 000a kor | |
| 040 | ▼a221008 | |
| 056 | ▼a559.7▼24 | |
| 245 | 00 | ▼aBi-Mo 酸化物의 ALKALI 浸出에 관하여 /▼d李相和 著 |
| 260 | ▼a부산:▼b東亞大學校 大學院,▼c1980 | |
| 300 | ▼a26 p.:▼b삽도;▼c26 cm. | |
| 502 | ▼a학위논문(석사)--▼b東亞大學校 大學院:▼c金屬工學專攻,▼d1980. 2 | |
| 520 | ▼b영문초록 : This study is to find out the mechanism by which reaction products form when the bismuth trioxide and molybdenum trioxide is sufficiently mixed with a mole ratio of 1 to 1 and then heated at various temperatures selected from the differntial thermal analyses. The results obtained from the experiment that these reaction products have been alkali-leached are summarised as follows; 1. The reaction products of the mixture of Bi_(2)O_(3) and MoO_(3)(mole ratio=1:1) for 500℃ are Bi_(2)MoO_(6), Bi_(4)MoO_(9) and α-Bi_(2)O_(3), whereas at above 670℃ the product obtained is identified to be Bi_(4)MoO_(9) by the reation Bi_(2)MoO_(6)+α-Bi_(2)O_(3)--- Bi_(4)MoO_(9). 2. At a temperature of 1000℃ which is above the melting point of Bi_(2)O_(3) there is not change in weight. In the temperature range of 800 ℃ to 1000℃ below the boiling point of MoO_(3), however, it is shown to be a decrease in weight by 80%. 3. The melting point of Bi_(4)MoO_(9) is found to be 950℃. The change in weight of Bi_(4)MoO_(9) formed by mixing MoO_(3) and Bi_(2)O_(3) is not shown because of the formation of the compound Bi_(4)MoO_(9). 4. The chemical reaction analysis has shown that one of the reasons why the leaching rate of roasted ores of MoS_(2) containing Bi is lowered can be explained by the fact that Bi_(2)MoO_(6) and Bi_(4)MoO_(9) are not soluble in a solution of NaOH under the condition of atomosperic pressure. | |
| 650 | ▼aBM산화물 | |
| 950 | ▼aFB | |
| 950 | ▼a비매품▼b￦3000▼c(추정가) |
Bi-Mo 酸化物의 ALKALI 浸出에 관하여
종류
학위논문 동서
서명
Bi-Mo 酸化物의 ALKALI 浸出에 관하여
저자명
발행사항
부산: 東亞大學校 大學院 1980
형태사항
26 p: 삽도; 26 cm.
학위논문주기
학위논문(석사)-- 東亞大學校 大學院: 金屬工學專攻, 1980. 2
주기사항
영문초록 : This study is to find out the mechanism by which reaction products form when the bismuth trioxide and molybdenum trioxide is sufficiently mixed with a mole ratio of 1 to 1 and then heated at various temperatures selected from the differntial thermal analyses. The results obtained from the experiment that these reaction products have been alkali-leached are summarised as follows; 1. The reaction products of the mixture of Bi_(2)O_(3) and MoO_(3)(mole ratio=1:1) for 500℃ are Bi_(2)MoO_(6), Bi_(4)MoO_(9) and α-Bi_(2)O_(3), whereas at above 670℃ the product obtained is identified to be Bi_(4)MoO_(9) by the reation Bi_(2)MoO_(6)+α-Bi_(2)O_(3)- Bi_(4)MoO_(9). 2. At a temperature of 1000℃ which is above the melting point of Bi_(2)O_(3) there is not change in weight. In the temperature range of 800 ℃ to 1000℃ below the boiling point of MoO_(3), however, it is shown to be a decrease in weight by 80%. 3. The melting point of Bi_(4)MoO_(9) is found to be 950℃. The change in weight of Bi_(4)MoO_(9) formed by mixing MoO_(3) and Bi_(2)O_(3) is not shown because of the formation of the compound Bi_(4)MoO_(9). 4. The chemical reaction analysis has shown that one of the reasons why the leaching rate of roasted ores of MoS_(2) containing Bi is lowered can be explained by the fact that Bi_(2)MoO_(6) and Bi_(4)MoO_(9) are not soluble in a solution of NaOH under the condition of atomosperic pressure.
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