A method is provided for recovering boric acid from a solution containing boric acid and at least one lithium compound. The method comprises (a) passing the solution through an ion exchange resin such that boric acid accumulates on the resin; (b) removing the boric acid from the resin with an aqueous alcohol solution, thus obtaining a first solution comprising an alcohol, boric acid, and water; (c) converting at least a portion of the boric acid to trimethyl borate, thereby obtaining a second solution; (d) distilling an azeotrope from the second solution, wherein the azeotrope contains trimethyl borate; and (e) recovering boric acid from the azeotrope.
提供了一种从含
硼酸和至少一种
锂化合物的溶液中回收
硼酸的方法。该方法包括(a)通过离子交换
树脂将溶液通过,使
硼酸在
树脂上积累;(b)用含
水醇溶液从
树脂中去除
硼酸,从而获得包含醇、
硼酸和
水的第一溶液;(c)将至少一部分
硼酸转化为三甲基
硼酸酯,从而获得第二溶液;(d)从第二溶液中蒸馏出共沸物,其中共沸物含有三甲基
硼酸酯;(e)从共沸物中回收
硼酸。