Design, synthesis, and solution behaviour of small polyamines as switchable water additives
作者:Sean M. Mercer、Tobias Robert、Daniel V. Dixon、Chien-Shun Chen、Zahra Ghoshouni、Jitendra R. Harjani、Soran Jahangiri、Gilles H. Peslherbe、Philip G. Jessop
DOI:10.1039/c2gc16240g
日期:——
The practice of adding salt to water to induce salting out of contaminants or to break emulsions and suspensions is generally avoided industrially because of the expense of the necessary treatment of the salty water afterwards. However, the use of switchable water, an aqueous solvent with switchable ionic strength, allows for reversible generation and elimination of salts in aqueous solution, through the introduction and removal of CO2. In the effort to improve the efficiency of these switchable salts, a physical study modeling their reactivity and solution behaviour has been performed, resulting in a set of design principles for future switchable water additives. The resulting polyamines synthesized using this template show the highest efficiency recorded for a switchable water additive.
工业上通常避免在水中加盐,以促使污染物盐化或打破乳状液和悬浮液,因为事后对盐水进行必要处理的费用很高。然而,使用可转换水这种离子强度可转换的水溶剂,可以通过引入和去除二氧化碳,在水溶液中可逆地生成和消除盐分。为了提高这些可转换盐的效率,我们对它们的反应性和溶液行为进行了物理建模研究,为未来的可转换水添加剂制定了一套设计原则。利用该模板合成的多胺显示出了可转换水添加剂的最高效率。