離子液體快速合成及應用於脫硫之研究

Rapid Synthesis of Ionic Liquids and Application of Desulfurization

林澤瑋(Tse-Wei Lin)

指導教授 ： 蕭明謙

崑山科技大學/工程學院/環境工程研究所/碩士(2011年)

摘要

本論文是探討快速合成離子液體及應用於油品中進行氧化脫硫之應用，以微波及超音波快速合成來改善傳統合成之長時間及增加產率，並以離子液體替代傳統溶劑，將油品中的含硫化合物利用離子液體萃取出來，並在離子液體中加入催化劑及氧化劑進行化學氧化，將油品中含硫化合物氧化而生成sulfones，此方法具有溶劑萃取和化學氧化脫硫的效果。
本實驗以微波及超音波進行離子液體[Bmim]PF6合成，探討使用微波及超音波合成改善傳統合成之結果。氧化脫硫則使用DBT（dibenzothiophene）作為油中硫化物代表，探討離子液體[Bmim]PF6和催化劑HAc作微波萃取對脫硫效率之影響。由實驗結果發現，使用微波合成離子液體實驗結果所示，第一段合成離子液體在微波功率240W，反應時間110分鐘時[Bmim]Cl離子液體產率可達67.56%為最佳產率。第二段合成[Bmim]PF6之離子液體，經微波合成後與傳統合成相較下，可將原本24~48小時之合成時間減少至1小時，就可得所需之[Bmim]PF6離子液體最佳產率約達50%。超音波合成離子液體實驗結果顯示，第一段合成離子液體在超音波輸出功率100％，反應時間120分鐘時[Bmim]Cl離子液體產率可達61%為最佳產率。第二段合成[Bmim]PF6之離子液體，經超音波合成後與傳統合成相較下，可將原本24~48小時之合成時間減少至1小時，就可得所需之[Bmim]PF6離子液體最佳產率約達50%。實驗結果顯示使用微波及超音波輔助合成離子液體可有效減少合成時間，並發現使用微波合成與傳統方式相比可增加離子液體之產量。 將合成之[Bmim]PF6離子液體運用至氧化脫硫實驗，改變不同氧化脫硫之參數可得最佳脫硫率為93％，實驗證明使用微波輔助可快速合成離子液體，也可運用於快速氧化脫硫，而氧化脫硫製程中唯一耗損之原料只有H2O2，可取代使用有機溶劑進行油品脫硫之製程。

關鍵字

微波 ； 超音波 ； 離子液體 ； 氧化脫硫 ； [Bmim]PF6

並列摘要

Rapid synthesis of ionic liquids and application of desulfurization were discussed in this study. Improve the traditional synthesis time and increase the yield of ionic liquids with microwave and ultrasound. Ionic liquid can instead the traditional solvent. The sulfur compounds extracted using ionic liquids, catalyst and oxidant addition of chemical oxidation in oil. The oxidation of sulfur compounds generated sulfones in oil.
In this experiment, ionic liquids [BMIM]PF6 synthesis by microwave and ultrasound. Synthesis of microwave and ultrasound results to improve the traditional synthesis. The results showed ionic liquids using microwave synthesis results. Shown synthesis of ionic liquids in microwave power 240W in the first step, reaction time was 110 minutes [Bmim]Cl ionic liquid yield of 67.56% for the best yield. The synthetic [Bmim]PF6 ionic liquid were need in second step. Synthesized by microwave and conventional synthetic comparison the original 24 to 48 hours of reaction time reduced to 1 hour. [Bmim]PF6 ionic liquids the best yield was about 50%. Synthesis of ionic liquids ultrasound results showed that the first step of synthesis of ionic liquids in ultrasonic output power 100%. The reaction time of 120 minutes [Bmim]Cl ionic liquid yield of 61% for the best yield. The [Bmim]PF6 ionic liquid were syntheticed by ultrasound for second step. The original 24 to 48 hours of reaction time reduced to 1 hour. The best yield of [Bmim]PF6 ionic liquid was about 50%. The results showed that the use of microwave and ultrasound assisted synthesis of ionic liquids can effectively reduce the synthesis time and microwave the yield synthesis in comparison with the traditional reaction.
The synthesis of [Bmim]PF6 ionic liquid used to oxidative desulfurization. The best desulfurization rate was 93%. Proved using the microwave-assisted rapid synthesis of ionic liquid can also be applied to fast desulfurization. In oxidative desulfurization process. The only loss of the raw materials only H2O2. The use of organic solvent oil desulfurization process can replace.

並列關鍵字

microwave ； ionic liquid ； ultrasound ； desulfurization ； [Bmim]PF6

參考文獻

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