液氨是一种优良的溶剂。如钠-氨还原炔基、酯基,以及很多金属炔参与的化学反应,Birch还原反应等都需在液氨中进行。通常贮藏在钢瓶中的氨都含有水份。为了获得无水液氨,一般都是先将钢瓶中的氨气冷凝在一个瓶子中,然后加入金属钠脱水,再蒸入到另一个反应瓶内。这种操作(特别是需要大量的无水液氨时)既化费时间又要消耗大量的干冰。我们根据用液体洗涤气体的原理,设计了一种简单的装置,即将钢瓶中放出的氨气,经钠-氨溶液洗涤后,便可获得无水氨。但通常的洗瓶在温度骤变时易破裂,洗涤效果欠佳。为此我 Liquid ammonia is an excellent solvent. Such as sodium - ammonia reduction alkynyl, ester, and a lot of metal alkyne involved in the chemical reaction, Birch reduction reactions need to be carried out in liquid ammonia. Ammonia, which is usually stored in cylinders, contains moisture. In order to obtain anhydrous liquid ammonia, the ammonia gas in the cylinder is usually condensed in a bottle first, and then sodium metal dehydration is added, and then steam is distilled into another reaction bottle. This operation (especially when a large amount of anhydrous liquid ammonia is required) takes time and consumes a lot of dry ice. According to the principle of washing gas with liquid, we designed a simple device, that is to say, the ammonia released from the cylinder can be obtained after washing with sodium-ammonia solution. However, the usual bottle washing in the sudden change of temperature easily broken, poor washing effect. For this I