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前言 现在实验室各种分馏装置末端仍是用某种容器收集馏出物。有些实验对收集器要求相当严格。例如分馏环戊二烯要在干冰——丙酮浴中冷却至-78℃收集,小心排除湿气,容器先标好刻度以计量,这种操作麻烦、费用昂贵。由于分馏环戊二烯要立即使用,我们改变了传统的做法,不用接收器,省掉干冰——丙酮浴,让分馏出的环戊二烯直接进入使用装置——如合成二茂铁的反应器中,边分馏边合成。这样既能节省时间和费用,又能简化操作,提高产率。使分馏合成分步操作变为连续操作,便于自动控制。
Preface It is still the end of the various fractionation devices in the laboratory to collect distillate from some sort of container. Some experiments on the collector requirements are quite strict. For example, fractionated cyclopentadiene should be collected in a dry ice-acetone bath and cooled to -78 ° C. Care should be taken to remove the moisture. The container is marked with a graduated scale to measure. This is cumbersome and expensive. Because of the immediate use of fractionated cyclopentadiene, we have changed the traditional practice of eliminating the need for a receiver and eliminating the need for a dry ice-acetone bath, allowing the fractionated cyclopentadiene to go straight to the point where it is used - such as the reaction of synthetic ferrocene In the device, while fractional synthesis. This saves time and money, simplifies operations and increases productivity. Step-by-step synthesis of fractionation into a continuous operation, easy to automate.