【摘要】 采用恒压分液漏斗和蒸馏烧瓶组成的装置，饱和食盐水与电石反应是实验室制备乙炔的常用方法。该实验产生糊状Ca（OH）₂沉淀，存在反应速率过快、无法控制反应进程、产生气流不平稳、泡沫随气体冲出堵塞导管等问题。利用滴液式气体发生器，在反应容器中加入7 mm玻璃珠与电石混合，以10%氯化铵溶液为反应液，解决了实验室制备乙炔存在的问题，同时也提高了制备乙炔的产率。更多还原

【Abstract】 Using a device composed of constant pressure separatory funnel and a distillation flask, the reaction between saturated brine and calcium carbide is a common method for preparing acetylene in the laboratory. This experiment produces a large amount of paste-like Ca（OH）₂ precipitation, and there are problems such as too fast reaction rate, uncontrollable reaction process, unstable air flow, and foam rushing out with the gas to block the conduit. In this paper, 7 mm glass beads were mixed with calcium carbide in a drop-type gas generator, and 10% ammonium chloride solution was used as the reaction solution to prepare acetylene. By the method, the problems in the laboratory preparation of acetylene were solved and the efficiency of preparation of acetylene was improved.更多还原