Preparation method of dihydroxy sulfonic acid amine salt

The invention discloses a preparation method of dihydroxy sulfonic acid amine salt, and belongs to the technical field of synthesis of organic compound water-based chain extenders. The preparation method of the dihydroxy sulfonic acid amine salt comprises the following steps: S1, acidifying a 2, 3-dihydroxy-1-sodium propane sulfonate solution by adopting sodium type strong acid cation exchange resin, and then concentrating to obtain an acidified concentrated solution; and S2, adding triethylamine into the acidified concentrated solution obtained in the step S1 to obtain the 2, 3-dihydroxy-1-propane sulfonic acid triethylamine salt. According to the method disclosed by the invention, the 2, 3-dihydroxy-1-propane sulfonic acid triethylamine salt can be relatively simply prepared. 本发明公开了一种二羟基磺酸胺盐的制备方法，属于有机化合物水性扩链剂合成技术领域。该二羟基磺酸胺盐的制备方法，包括以下步骤：S1、将2，3-二羟基-1-丙烷磺酸钠溶液采用钠型强酸性阳离子交换树脂进行酸化，之后浓缩得到酸化浓缩液；S2、向步骤S1得到的酸化浓缩液中加三乙胺得到2，3-二羟基-1-丙烷磺酸三乙胺盐。该方法能够较为简单的制得2，3-二羟基-1-丙烷磺酸三乙胺盐。