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目前广泛应用的液-液相转移催化反应有两个主要的缺点:一是有一些水分子会随着离子对一起萃入有机相并在其周围形成水化膜,这不仅会降低反应速度有时还会引起种种副反应。另一个缺点是这种方法不适用于强亲水性的离子。在这两种情况下改用固液相反应可能有良好的效果。但是鎓盐为催化剂的固液相转移是否真正的可逆过程,它的相转移规律如何,至今尚未见文献报导。本文研究了溴化四丁铵与某些羧酸钾盐之间的反应平衡常数,其它工作正在进行中。
At present, the liquid-liquid phase transfer catalytic reaction widely used has two main disadvantages: firstly, some water molecules will be extracted into the organic phase along with the ion pairs to form a hydration film around them, which not only reduces the reaction speed and sometimes Will also cause a variety of side effects. Another disadvantage is that this method is not suitable for strongly hydrophilic ions. In both cases the switch to solid-liquid reaction may have a good effect. However, whether the solid-liquid phase transfer of onium salt as a catalyst is a true reversible process or not, and how its phase transfer rule has not been reported yet. This article studies the equilibrium constant of the reaction between tetrabutylammonium bromide and some of the potassium carboxylates, and other work is under way.