气相色谱法与化学法测定混合烷基铝中烷基置换反应的总速率  

Study on the Rate of Alkyl Replacement Reaction in Mixture of Alkyl Aluminum by Gas Chromatography and Chemical Method

作　　者：李宝军[1] 王辉[1] 何仁[1] 何宽 

机构地区：[1]大连理工大学精细化工国家重点实验室,大连116012 [2]大连华洋科学仪器公司,大连116013

出　　处：《分析化学》2001年第8期913-915,共3页Chinese Journal of Analytical Chemistry

摘　　要：研究乙烯对混合烷基铝 (C2 2 6 )中烷基的置换反应的分析方法。采用水解反应产物 ,准确测量产生气体的体积 ,用气相色谱法分析其中乙烷的含量 ,用化学法测定水解产物水相中的铝含量。计算出置换反应的转化率为 82 .89% ,反应速率为 0 .45 0 2mol(C2 H5) mol(Al) sec。建立的方法简便、快速、精密度良好 ,可应用于其他有机铝化合物的置换反应。The analytical method that alkyl in mixture of alkyl aluminum (G(2-26)) was replaced by ethylene has been investigated. The gas volume produced by hydrolyzsis of replacement products was measured precisely with a gas volumeter. the quantity of ethane and the aluminum in water phase was determined by gas chromatography and chemical method respectively, and then the conversion percentage as well as reaction rate can be calculated. The conversion percentage of replacement reaction was 82.89%, reaction rate was 0.45 mot (C2H5)/mol (Al)/s. The reported method is simple and rapid.

关 键 词：气相色谱法 混合烷基铝 烷基置换反应 化学法 总速率测定 有机铝化合物 

分 类 号：O657.7[理学—分析化学]