使用滴液式气体发生器制备乙炔  

Preparation of Acetylene by Drop-Type Gas Generator

作　　者：史亦琳 张尊听[1] 董丽英 SHI Yi-Lin;ZHANG Zun-Ting;DONG Li-Ying(School of Chemistry and Chemical Engineering,Shaanxi Normal University,Xi’an 710119,China)

机构地区：[1]陕西师范大学化学化工学院,陕西西安710119

出　　处：《化学教育（中英文）》2023年第19期96-99,共4页Chinese Journal of Chemical Education

基　　金：陕西省创新能力支撑计划项目(2021PT-043)。

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。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.

关 键 词：乙炔 气体制备 滴液式气体发生器 实验改进 

分 类 号：G633.8[文化科学—教育学] TQ221.242-4[化学工程—有机化工] G642.423