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除去甲烷中混有的乙烯为什么能用溴的四氯化碳溶液

2025-03-30 08:38:02

推荐回答（1个）

回答1：

溴是一个化学元素，在化学元素周期表中位于第4周期、第VIIA族，是卤素之一。活性介于氯与碘之间。在四氯化碳溶液中，溴可以与乙烯反应生成二甲基乙烷。属于加成反应。而二甲基溴乙烷为液体，可以实现乙烯从甲烷里分离出来。

CH2=CH2+Br2----->CH2=CHBr+HBr

但是溴分子在标准温度和压力下是有挥发性的红棕色液体，挥发的溴分子会混合到甲烷中，而又污染了甲烷。所以说该提法不是很不合理。

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