需要金幣： 1000 個(gè)金幣 |
資料包括：完整論文 |  |
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| 轉(zhuǎn)換比率：金額 X 10=金幣數(shù)量， 例100元=1000金幣 | 論文字?jǐn)?shù)：7031 |  | |
| 折扣與優(yōu)惠：團(tuán)購(gòu)最低可5折優(yōu)惠 - 了解詳情 | 論文格式：Word格式(*.doc) |  |
摘要：乙酸乙酯是有機(jī)合成的重要原料和良好的溶劑，廣泛應(yīng)用于飲料、香料、涂料、粘合劑、增塑劑和醫(yī)藥等工業(yè)生產(chǎn)。隨著我國(guó)化學(xué)工業(yè)、醫(yī)藥工業(yè)和相關(guān)產(chǎn)業(yè)的高速發(fā)展，對(duì)乙酸乙酯的消費(fèi)量也逐年上升。 傳統(tǒng)的生產(chǎn)中是以濃硫酸為催化劑來(lái)合成乙酸乙酯的，該方法工藝復(fù)雜，污染嚴(yán)重。硫酸腐蝕設(shè)備，并引起副反應(yīng)。由于濃硫酸的強(qiáng)氧化作用，反應(yīng)過(guò)程中易發(fā)生局部脫水、醚化、碳化等副反應(yīng)，影響最終產(chǎn)品的質(zhì)量和原料的利用率。 由于固體酸具有不溶于水、制備方便、污染少、產(chǎn)品分離程序簡(jiǎn)單等優(yōu)點(diǎn)。所以本實(shí)驗(yàn)利用乙醇和乙酸合成乙酸乙酯的實(shí)驗(yàn)體系，以正交試驗(yàn)的方式來(lái)優(yōu)化反應(yīng)時(shí)間、醇酸比、催化劑用量等對(duì)反應(yīng)酯化率的影響，考察Ti5Sn3在此酯化反應(yīng)中的催化活性。 結(jié)果表明Ti5Sn3在此反應(yīng)模型中，具有較好的催化性能。當(dāng)醇酸摩爾比為1∶3.6，催化劑用量為0.2000g，80℃回流反應(yīng)0.5h時(shí)，酯化率可達(dá)86%以上。Ti5Sn3回收4次后，仍能使反應(yīng)的酯化率達(dá)到73.28％—75.31％。 關(guān)鍵詞：Ti5Sn3；催化合成； 酯化率
ABSTRACT：Ethyl acetate is an important raw material and good solvent of organic synthesis,.Ethyl acetate was widely used in beverage,spices,coating,adhesive，plasticizer and medicine and other industrial production. With the high speed development of China's chemical industry,pharmaceutical industry and related industry, the need for ethyl acetate consumption has increased year by year. The traditional production of sulfuric acid as catalyst in synthesis of ethyl acetate, this method process was complex, serious pollution. Sulfuric acid corrosion equipment, and cause side effects. Because of the strong sulfuric acid oxidation, the reaction process happens during local dehydration, etherification, carbonization influence side effects, the final product quality and the utilization rate of raw materials. Because of solid acid has not soluble in water, preparation convenient, less pollution, product separation process simple, etc. So this experiment using ethanol and acetic acid synthesis of ethyl acetate experimental system, to the way of orthogonal test to optimize the reaction time, alkyd, catalyst dosage of than reaction, the influence of esterification rate Ti5Sn3 investigation in the esterification reaction of catalytic activity. The results show that the model Ti5Sn3 reaction, and has a good catalytic performance. When alkyd for 1:3.6 the mole ratio of catalyst, for 0.2000 g, 80 ℃ backflow reaction 0.5 h, esterification rate of 86%. Ti5Sn3 recovery 4 times, can still make the reaction of esterification rate 73.28%-75.31%. Key words: Ti5Sn3 ;catalytic synthesis ;esterification; |
