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Metal ions can be separated from one another by complexation with organic ligands–the chelating agent– to form uncharged chelates. Here, the chelating agent must contain hydrophobic groups and behave as a weak acid, losing a proton to bind with the metal. Since most organic ligands used in this process are insoluble or undergo oxidation in the aqueous phase, the chelating agent is initially added to the organic phase and extracted into the aqueous phase. The metal-ligand complex is...
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基于金属有机框架的分离器,用于将烯与气分离

A Cadiau1, K Adil1, P M Bhatt1

  • 1Division of Physical Sciences and Engineering, Advanced Membranes and Porous Materials Center, Functional Materials Design, Discovery and Development Research Group (FMD), King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Kingdom of Saudi Arabia.

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科学领域:

  • 材料科学
  • 化学工程
  • 分离科学

背景情况:

  • 对化学工业来说 Olefin/paraffin 分离至关重要,但依赖于能源密集型方法.
  • 开发高效和选择性分离的先进材料是一个关键挑战.

研究的目的:

  • 报告使用网状化学制造一种新的,化学稳定的化金属有机框架 (MOF).
  • 证明MOF具有选择性烯酸/烯酸分离的能力.

主要方法:

  • 通过与 (NbOF5) ((2-) 柱相连接的Ni(II) -pyrazine层制造3DMOF (NbOFFIVE-1-Ni/KAUST-7).
  • 使用循环混合气体吸附和热量测量研究来评估分离性能.

主要成果:

  • MOF具有收缩的正方形通道,由于体积大 (NbOF5) 的柱子而受到限制.
  • 在大气压下从中实现了的选择性分子排除.
  • 这种材料具有化学稳定性.

结论:

  • 网状化学可以设计出适合特定分离的孔状结构的MOF.
  • NbOFFIVE-1-Ni作为工业烯酸/烯酸分离的低能耗替代品具有前景.