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[求助]
简单的基础翻译：乙酸乙酯的制备 不要有语法错误 急求
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在50mL圆底烧瓶中加入9.5mL（0.2mol）无水乙醇和6mL（0.10mol）冰醋酸，再小心加入2.5mL浓硫酸，混匀后，加入沸石，然后装上冷凝管。 小心加热反应瓶，保持缓慢回流1/2h，待瓶内反应物冷却后，将回流装置改成蒸馏装置，接受瓶用冷水冷却。加热蒸出生成的乙酸乙酯，直到馏出液体积约为反应物总体积的1/2为止。 在馏出液中慢慢加入饱和碳酸钠溶液，并不断震荡，直到不再有二氧化碳气体产生，然后将混合液转入分液漏斗，分去下层水溶液，有机层用5mL饱和食盐水洗涤，再用5mL包和氯化钙洗涤，最后用水洗一次，分层下层液体。有机层倒入一干燥的三角烧瓶中，用无水硫酸镁干燥，粗产物约6.8g。将干燥后的有机层进行蒸馏，收集73～78℃的馏分，产量约4.2g。 |
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vivanslum
木虫 (正式写手)
- 翻译EPI: 94
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【答案】应助回帖
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爱与雨下: 金币+1 2012-06-07 19:24:23
dcjb: 金币+140, 翻译EPI+1, ★★★很有帮助, 翻译得不错，实验翻译成过去式的就更好了，不过怪我没说清楚 2012-06-09 12:45:56
爱与雨下: 金币+1 2012-06-07 19:24:23
dcjb: 金币+140, 翻译EPI+1, ★★★很有帮助, 翻译得不错，实验翻译成过去式的就更好了，不过怪我没说清楚 2012-06-09 12:45:56
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Add 9.5mL（0.2mol）anhydrous ethanol and 6mL (0.10mol) acetic acid into a 50mL round bottom flask，and then add carefully 2.5mL concentrated sulphuric acid. After mixing thoroughly，add zeolites and install condensation tubes. Carefully heat the reaction flask to maintain a slow reflow during 1/2 h. After the reactants in the flask are cooled down，the reflow device are changed into the distillation apparatus and the receiving flask is cooled down using cold water. Heat the ethyl acetate generated by steam, until the volume of distillate liquid is about 1/2 of the total volume of reactants. Slowly add the saturated sodium carbonate solution into the distillate liquid, with continuous stirring，until there is no generation of carbon dioxide gas. Then transfer the mixture to a separatory funnel and remove the aqueous solution in the lower layer. The organic layer is washed with 5mL saturated salt water，followed by 5mL saturated calcium chloride solution and finally with water，and the lower liquid is removed. The organic layer is transferred into a dry triangular flask，and is dried using anhydrous magnesium sulfate，which produces a crude product about 6.8g. Distill the dried organic layer and collect the fraction of 73 ~ 78 ° C, with a final production about 4.2g. 仅供参考 |
2楼2012-06-07 18:41:17