本論文目的在於篩選適當之觸媒，以將丙烯醇和過氧化氫之環氧化反應以生成環氧丙醇，並且選擇較佳之觸媒以探討各種反應條件，包括:反應溫度、添加劑種類及濃度、觸媒量及反應物濃度等的因素，對反應物之轉化率和產物之產率及選擇率的影響;此外，本研究亦探討此環氧化反應之反應動力學。 實驗結果顯示，在不加入溶劑之情況下，發現Na2WO4·2H2O觸媒對於丙烯醇環氧化成環氧丙醇之反應，具有不錯之反應效果;增加反應溫度對反應速率有明顯的增進，溫度越高，反應速率越快;相對的，溫度越高，越能加速副產物的生成，造成環氧丙醇之選擇率及產率下降，我們發現40℃~50℃的反應溫度是較佳之操作條件。反應物和觸媒的比例，在H2O2/Na2WO4·2H2O莫耳比為1/4.8*10-3時為一最佳操作條件。 對於H2WO4觸媒而言，加入某些適當的添加劑能夠明顯的增加環氧丙醇之選擇率及產率，其中以NaOH及KOH效果最好; 當H2WO4/添加劑莫耳比=2時，是一最佳操作條件。 在動力學方面，Na2WO4·2H2O觸媒之丙烯醇環氧化反應為一級反應，其活化能為E=55.33KJ/mole。 This thesis studies catalysts for the epoxidation of allyl alcohol with hydrogen peroxide to glycidol. A variety of reaction conditions are investigated, including reaction temperature, additive types and concentration、catalyst amounts and reactant concentration, to study their influence on the conversion, yield and selectivity. In addition, reaction kinetics of allyl alcohol epoxidation is studied. Na2WO4·2H2O shows good catalylic performance for epoxidation of allyl alcohol to glycidol. With the increase of reaction temperature, the reaction rate increase, but selectivity and yield of glycidol decrease at high temperature due to the increase of by-product formation. We found that the optimum reaction temperature is in the range of 40℃ and 50℃. The optimum mole ratio of H2O2 to Na2WO4·2H2O is 1/4.8*10-3. For catalyst H2WO4, the addition of suitable additives significantly increase the selectivity and yield of glycidol, especially NaOH and KOH have the best results, The optimum mole ratio of additive to H2WO4 is 2. The results of kinetics study show that the epoxidation of allyl alcohol to glycidol with Na2WO4·2H2O is first order reaction and the activation energy is 55.33KJ/mole.
