臺灣博碩士論文加值系統

稀土金屬廣泛應用於電子、機械、航太工業等許多領域，其中鈰(Ce)可做為氧化劑、拋光粉、玻璃和瓷器的黃色染料、石油提煉液體催化過程(FCC)催化劑等，其中最常被應用在鏡頭、三稜鏡等光學玻璃的拋光研磨處理所使用的氧化鈰(CeO2)系拋光粉。本研究旨在利用液液抽出法直接分離氧化鈰系玻璃拋光廢棄物中之氧化鈰系拋光粉和面板玻璃粉，以回收氧化鈰系拋光粉，除可促進氧化鈰系拋光粉的循環再利用之外，亦可做為各種稀土金屬的二次資源使用。
本研究以異辛烷為有機相進行抽出分離實驗，調整pH、捕集劑種類(SDS、NaOL、DAA)及捕集劑之添加量為變因，找出最佳條件並探討油水比及樣品混合比，再參照最佳條件應用於實際樣品。以本研究之流程對氧化鈰系拋光廢棄物進行處理，最佳結果為於pH 9添加2.5 kg/ton SDS時，異辛烷相回收物中氧化鈰系拋光粉之品位達80.8 %及回收率達97 %；於pH 7添加7.5 kg/ton NaOL時，異辛烷相回收物中氧化鈰系拋光粉的品位達83.2 %及回收率達96.2 %；於pH 9添加1 kg/ton DAA時，水相回收物中氧化鈰系拋光粉的品位達94.7 %及回收率達94 %。

Cerium (Ce) can be used for the manufacture of oxidizing agent, abrasive, yellow dye for glass and porcelain, and fluid catalytic cracking catalysts in the petroleum refinery processes. Among them, cerium oxide (CeO2) abrasive is the most commonly used for the polishing of lens, prism, and other optical glass. After polishing, a waste containing cerium oxide abrasive and polished glass powder was produced. In the present study, the use of liquid–liquid extraction for the separation of ultrafine particles of cerium oxide abrasive and glass powder from glass polishing slurry was studied. Isooctane was used as the organic phase. The effects of pH and surfactor collector addition, including SDS, NaOL, and DAA, were investigated.
The results indicated that the optimal conditions for the mutual separation of cerium oxide abrasive and glass powder were at pH 9 with the addition of 2.5 kg/ton SDS, the grade of cerium oxide abrasive in the isooctane phase solids was 80.8% with a recovery of 97%, and at pH 7 with the addition of 7.5 kg/ton NaOL, the grade of cerium oxide abrasive in the isooctane phase solids was 83.2% with a recovery of 96.2%, and at pH 9 with the addition of 1 kg/ton DAA, the grade of cerium oxide abrasive in the water phase solids was 95% with a recovery of 94%.

摘要 i
ABSTRACT ii
誌謝 iii
目 錄 iv
表目錄 vii
圖目錄 viii
第一章 緒論 1
1.1 前言 1
1.2 研究動機 2
1.3 研究目的 4
1.4 研究流程 5
第二章 文獻回顧 7
2.1 氧化鈰系拋光粉 7
2.2 氧化鈰系玻璃拋光廢棄物之回收方法 8
2.2.1 強鹼浸漬法 8
2.2.2 強酸氧化熱處理 8
2.2.3 強酸-雙氧水浸漬法 8
2.2.4 氯化揮發法 8
2.2.5 濕法冶金法 9
2.3 液液抽出法 9
2.3.1 液液抽出法原理 9
2.3.2 液液抽出法影響因子 10
2.3.3 液液抽出法之應用 10
第三章 實驗材料與方法 15
3.1 實驗材料 15
3.1.1 氧化鈰系拋光粉 15
3.1.2 面板玻璃粉 17
3.1.3 氧化鈰系玻璃拋光廢棄物 19
3.1.4 實驗藥品 20
3.2 實驗設備 22
3.2.1 粒徑分析 22
3.2.2 元素成分分析 22
3.2.3 高效率電荷滴定-界面流動電位分析儀 23
3.3實驗方法 25
3.3.1 個別樣品抽出實驗 25
3.3.2 混合樣品和實際樣品抽出分離實驗 27
第四章 結果與討論 29
4.1 個別樣品抽出實驗 29
4.1.1 未添加捕集劑 29
4.1.2 添加SDS捕集劑的影響 31
4.1.3 添加NaOL捕集劑的影響 35
4.1.4 添加DAA捕集劑的影響 38
4.1.5 個別樣品抽出試驗小結 42
4.2 混合樣品抽出分離實驗 43
4.2.1 混合樣品1：1抽出分離實驗 43
4.2.2 不同混合比例樣品抽出分離實驗 55
4.2.3 不同油水比例抽出分離實驗 57
4.2.4 混合樣品9：1抽出分離實驗 59
4.2.5 混合樣品抽出分離實驗小結 62
4.3 實際樣品抽出分離實驗 64
4.3.1 pH 9時SDS添加量的影響 64
4.3.2 pH 7時NaOL添加量的影響 65
4.3.3 pH 9時DAA添加量的影響 66
4.3.4 實際樣品抽出分離實驗小結 67
第五章 結論與建議 68
5.1 結論 68
5.2 建議 69
參考文獻 70

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