HTRI中Piping怎么填? 请问各位大侠,HTRI算卧式热虹吸式 再沸器 的时候,Piping这一项怎么填,是填详细的还是写总长,另外,outlet中的Height of main pipe at exit是什么意思?在塔裙座高度暂定6米,再沸器回流口位置没有定,塔和再沸器相对位置都没定,我该怎么定义Piping呢?谢谢,请详细点哦。 查看更多3个回答 . 4人已关注
狄克曼反应求助? 小弟我最近做的一个狄克曼反应,怎么都不成功,得不到目标产物,合成路线如下: 合成步骤: To a solution of compound 1 (21 g, 63 mmol) in THF (240 mL) at 10 °C was added a 1M solution of t-BuOK in THF (185mL, 185 mmol) dropwise over 30 min while maintaining the temperature at 10 °C. After 2.5 h, 50 mL of H2O followed by 190 mL of 1N HCl were added to bring the solution to pH = 4. The resulting mixture was allowed to stir at rt for 40 min. The organic solution was separated and the aqueous solution was extracted with EtOAc (2 x 200 mL). The organic solutions were combined, dried over Na2SO4, filtered and concentrated to give compound 2 (97%). 但是得到的产物却是酯水解后的产物,其核磁谱图如下 请各位大侠帮帮忙,给解决一下,指条明路给兄弟啊 查看更多15个回答 . 1人已关注
属于消除点火源的措施是( )。? 防止火灾、**事故发生的主要措施包括:防止燃烧、**物质形成,消除点火源和限制火灾**蔓延扩散。下列防止火灾、**事故发生的措施中,属于消除点火源的措施是 ( ) 。 A .对盛装危险化学品的容器进行清洗置换 B .加强现场气体监测 c .生产场所采用防爆型电气设备 D 。采用防爆泄压装置 查看更多4个回答 . 3人已关注