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.

  • 互联网摘选 2025-01-17 06:30:57

    • 相关例句
    精确
    • 模糊
    • 词首
    • 词尾
    • 词义
    • 例句