山西省公安民警身体素质调查分析研究

公安民警身体素质的强弱是直接影响队伍战斗力的重要因素。课题在问卷调查、实际测评的基础上,采用体育统计学的方法进行分析、对比,认为山西省公安民警的身体素质普遍较差。通过调查分析,找出原因,并提出建议,旨在为山西省公安民警今后的体能训练提供依据和帮助。     

Separation of the Ternary System of Methanol/ Methyl Butyl Ether/1-Butylchloride

The separation of ternary methanol/methyl butyl ether/1-butylchloride mixtures was investigated, which are the main components of the waste liquid. After preliminary studies on the ternary system, the integrated process of extraction and distillation was put forward to separate the ternary system. The results show that methanol carl be removed from the mixtures by extraction using water as the extracting agent. Through distillation of extract and dried raffinate respectively, methanol, methyl butyl ether and 1-butylchloride can be separated and recovered. In addition, the optimal volume for the extracting agent and effects of reflux ratio on the yield of product were also studied. The optimal volume ratio of the extracting agent to material is 1： 3.5, and the yield of the product increases with the increase of reflux ratio.