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題名 | Operation and Control of Batch Extractive Distillation for the Separation of Mixtures with Minimum-boiling Azeotrope=分離含最低共沸混合物之批次萃取蒸餾的操作與控制 |
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作者姓名(中文) | 姚君揚; 林聖育; 錢義隆; | 書刊名 | Journal of the Chinese Institute of Chemical Engineers |
卷期 | 38:5/6 2007.09-11[民96.09-11] |
頁次 | 頁371-383 |
分類號 | 460.02 |
關鍵詞 | 最低共沸混合物; 萃取; 蒸餾; Batch extractive distillation; Batch rectifier; Entrainer; Dynamic simulation; Operation and control strategy; |
語文 | 英文(English) |
中文摘要 | 批次蒸餾廣泛使用於精密與特用化學品、生醫及食品等工業。若要分離含最低共沸點之混合特,工業界時常另外加入-高沸點的萃取劑以利分離出純成分。文獻中大部份的論文僅探討批次萃取蒸餾操作步驟的第一部份,即分離出混合物中的最輕成分,對操作步驟中的其他部份則鮮少探討。本論文將以兩個實施例子探討批次萃取蒸餾由空塔至批次終了完整之操作步驟。第一個例子廣為文獻中論文所採用,為以水為萃取劑來分離異丙醇及甲醇。第二個例子文獻中未見探討,為使用二甲基亞碸(Dimethyl Sulfoxide, DMSO)為萃取劑來分離異丙醇及水。論文中會探討各操作變數的最佳值,如預先與混合特共同置入塔底之萃取劑量、操作步驟第一部份萃取齊連續注入的流率及各階段操作回流率及各階段操作回流比等。模擬中將會探討固定回流比及固定萃取劑流率的操作,並會探討若使得此兩個操作變數變動時可否進一步改善批次操作的效果。此兩個操作變數的變動可由兩個漫 度控制環路來決定。所有模擬將採用工業界常用的動態模擬器(Aspen Dynamics)來對完整操作步驟進行描述。 |
英文摘要 | Batch distillation is commonly used in the fine chemicals, specialty polymer, biochemical, pharmaceutical, and food industries. For separating mixtures with minimum-boiling azeotrope, a heavy entrainer is frequently added to the top section of the batch column to aid in the separation. This process is called batch extractive distillation. Most of the papers in open literature have only studied the first operating step of the batch extractive distillation which is the recovery of the light component without mentioning the later steps for the recovery of the other component and entrainer. In this paper, two real chemical systems, one separating acetone and methanol using water as entrainer and the other separating isopropyl alcohol (IPA) and water using dimethyl sulfoxide (DMSO) as entrainer, are studied for the feasible operation of the complete batch distillation sequence. The operating variables, including the pre-load amount with the mixture, continuous feed rate of the entrainer, and reflux ration at each operating step are determined in the operating sequence. The constant reflux ration and constant entrainer feed rate operating policy and another policy to allow these two operating variables to be varied will be compared in order to further improve the batch operation. All dynamic simulations that are performed directly mimic industrial situations from an empty column using a rigortous dynamic simulator, Aspen Dyoamics™. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。