Results: The contents of total Polyamine and 3 kinds of polyamines compositions all samples were different.

结果: 不同样品的3种多胺类成份及总多胺含量均有一定差异.

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Piperazine was separated from ethylenediamine byproduct polyethylene polyamines mixture by refrigeration and azeotrope distillation.

通过冷冻、共沸蒸馏,从多乙烯多胺混合物中分离出哌嗪.

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