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Diamines as switchable-hydrophilicity solvents with improved phase behaviour

机译：用改善的相位行为为可切换 - 亲水性溶剂

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摘要

Removing solvents by distillation is not a sustainable process because it requires the use of volatile solvents and a high energy input. An alternative is to use a switchable-hydrophilicity solvent (SHS), which can be removed from products and recycled without any distillation step. SHSs are solvents that reversibly switch between hydrophilic and hydrophobic forms with the addition and removal of a trigger such as CO2. Monoamine SHSs can be separated from dissolved products by extraction into carbonated water, but the solvent removal is limited by the distribution coefficient of the SHS between the carbonated water phase and the product phase. In this article, the use of diamines as SHSs with improved distribution coefficients is explored. Several diamine SHSs are identified and their properties compared to those of monoamine SHSs. Comparisons include the pK(aH) (the pK(a) of the conjugate acid of a base) and log K-OW (log of the octanol-water partition coefficient) requirements for amines to act as SHSs, distribution coefficients, removal from hydrophobic liquids, switching speeds, and risks to the environment and human health and safety.
机译：通过蒸馏除去溶剂不是可持续的过程，因为它需要使用挥发性溶剂和高能量输入。替代方案是使用可切换 - 亲水性溶剂（SHS），其可以从产物中除去并再循环而没有任何蒸馏步骤。 SHSS是可逆地切换亲水性和疏水形式的溶剂，并加入和移除诸如CO 2的触发器。单胺SHSS可以通过萃取到碳酸水中与溶解产物分离，但溶剂去除受碳酸化水相和产物相之间SHS的分布系数的限制。在本文中，探讨了用DIADINE作为具有改进的分配系数的SHSS。与单胺SHSS相比，鉴定了几种二胺SHSS及其性质。比较包括PK（AH）（碱的缀合酸的PK（A））和Log K-OW（辛醇 - 水分配系数的数量）对胺的要求作为SHSS，分布系数，从疏水中移除液体，切换速度和环境和人类健康和安全的风险。

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  • 来源
    《RSC Advances》 |2018年第48期|共8页
  • 作者

    Vanderveen Jesse R.; Geng Jialing; Zhang Susanna; Jessop Philip G.;

  • 作者单位

    Queens Univ Dept Chem 90 Bader Lane Kingston ON K7L 3N6 Canada;

    Queens Univ Dept Chem 90 Bader Lane Kingston ON K7L 3N6 Canada;

    Queens Univ Dept Chem 90 Bader Lane Kingston ON K7L 3N6 Canada;

    Queens Univ Dept Chem 90 Bader Lane Kingston ON K7L 3N6 Canada;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
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