24小时热门版块排行榜    

查看: 742  |  回复: 1
本帖产生 1 个 翻译EPI ,点击这里进行查看

dcjb

银虫 (小有名气)

[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

   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。
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖

vivanslum

木虫 (正式写手)

【答案】应助回帖

★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ...
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
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
心若调适,道可得矣;清净安乐,道不失矣
2楼2012-06-07 18:41:17
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖
相关版块跳转 我要订阅楼主 dcjb 的主题更新
最具人气热帖推荐 [查看全部] 作者 回/看 最后发表
[论文投稿] 污染物降解的矿化特性 +9 透明的心sky 2024-12-23 12/600 2024-12-24 00:42 by 透明的心sky
[硕博家园] 只想摆烂 +9 s150535912 2024-12-23 15/750 2024-12-24 00:37 by 问道游潜
[考博] 自己找博士可真难啊 +9 鸡腿啦啦啦 2024-12-23 15/750 2024-12-23 23:46 by 鱼翔浅底1
[硕博家园] 纠结退学ing +20 幽皮皮皮 2024-12-22 35/1750 2024-12-23 23:33 by 你看笑靥如花
[论文投稿] 挑数据是造假吗 +10 电话的建设 2024-12-21 10/500 2024-12-23 18:53 by longwen8
[考博] 求老师哦! +6 景小凯 2024-12-20 6/300 2024-12-23 17:51 by 变成小神
[基金申请] 大论文改改变成项目申请书 +6 wusiqi2020 2024-12-21 6/300 2024-12-23 17:28 by 星雨寒Mos
[论文投稿] MDPI投稿连续拒稿是什么原因?文章质量不好吗?还是其他原因? 2+9 多听多看多学 2024-12-17 19/950 2024-12-23 17:12 by maolC
[职场人生] 国企、民企行业不同,如何决择? +10 haihe623 2024-12-19 12/600 2024-12-23 16:02 by syl200707
[有机交流] 装柱干法上样 +5 刘松垚 2024-12-20 5/250 2024-12-23 13:14 by 风永不止步
[找工作] 柔引引进博士硕士。 +21 大发财树 2024-12-18 22/1100 2024-12-23 09:32 by Demo呆萌
[论文投稿] Required Reviews Completed +9 驴哈哈 2024-12-20 10/500 2024-12-22 20:58 by 凌晨一点393
[考博] 定向就业,毕业证学位证由工作单位领取? +3 河西夜郎 2024-12-22 4/200 2024-12-22 20:30 by changlu999
[硕博家园] 脂质氧化 +3 song794 2024-12-22 4/200 2024-12-22 14:12 by song794
[论文投稿] 投稿期刊 5+4 王丽媛西西西 2024-12-17 7/350 2024-12-22 04:44 by yudaoqian88
[考博] 华南理工大学 “新能源交叉创新团队--主动安全”课题组招收海外联合培养博士生 +4 hubble 2024-12-20 5/250 2024-12-21 16:16 by 那片叶落
[教师之家] 今年的科研绩效只奖励Q1了 +12 holypower 2024-12-20 17/850 2024-12-21 16:13 by willbuilder
[论文投稿] Transportation Research Part C 投稿模板 5+3 Yetzirah 2024-12-20 4/200 2024-12-20 16:32 by 北京莱茵润色
[论文投稿] Molecular Crystals and Liquid Crystals投稿8个月没有信息 +4 书剑如风 2024-12-17 12/600 2024-12-20 04:40 by 胖胖的大海
[论文投稿] 论文投稿 +4 @星尘@ 2024-12-17 6/300 2024-12-19 09:39 by YXLSYJK
信息提示
请填处理意见