Chen Yunhua*, Ding Qiong, Zhang Haibo, Deng Lizhi, Xia Chunlan
(National Demonstration Center for Experimental Chemistry Education, Wuhan University, Wuhan 430072, China; College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, Hubei, China)
Abstract:
Vacuum is often required in chemical experiments.Usually, the student laboratory uses an experimental apparatus with a vacuum pump and some additional protective devices.Thus, a complete set of vacuum system is not a simple system, and a large number of experiments are performed simultaneously.Therefore, if such a laboratory is equipped with more vacuum equipment, the more difficult it is to manage.This paper introduces the following methods to improve and transform the vacuum system in chemistry laboratory: ①Improve the design of vacuum circuit and reduce the number of vacuum equipment sets;②Upgrade the equipment layout of the vacuum system;③Prevent the occurrence of backflow phenomenon.The vacuum system proposed could make the experiemnt more convenient to manage, also improve the laboratory environment.
KeyWords:
chemical experiments;vacuum system;vacuum circuit;sharing vacuum;prevent backflow
