The present invention relates to a process for the preparation of a purified salt of 4-sulfophenyl-[(1-oxyalkanoyl)amino]alkanoate. The process comprises the steps of: (a) providing a source of 4-sulfophenyl-[(1-oxyalkanoyl)amino]alkanoate; (b) admixing the source with a water-based purification system to form a purification mixture, the water-based purification system having water present at a ratio of 4-sulfophenyl-[(1-oxyalkanoyl)amino]alkanoate to water ranging from about 1:0.05 to about 1:50, preferably from about 1:0.1 to about 1:40; (c) separating a purified salt of 4-sulfophenyl-[(1-oxyalkanoyl)amino]alkanoate from the purification mixture; and (d) collecting said purified salt of 4-sulfophenyl-[(1-oxyalkanoyl)amino]alkanoate. In preferred embodiments, the purification mixture includes a processin aide such as ethyl alcohol, propyl alcohol, isopropyl alcohol, acetone and mixtures thereof.
本发明涉及一种制备4-磺基苯基-[(1-氧烷酰基)
氨基]烷酸盐的纯化过程。该过程包括以下步骤:(a)提供4-磺基苯基-[(1-氧烷酰基)
氨基]烷酸盐的来源;(b)将该来源与基于
水的纯化系统混合,形成纯化混合物,其中基于
水的纯化系统中
水的比例为4-磺基苯基-[(1-氧烷酰基)
氨基]烷酸盐与
水的比例范围大约为1:0.05至1:50,优选范围为1:0.1至1:40;(c)从纯化混合物中分离出4-磺基苯基-[(1-氧烷酰基)
氨基]烷酸盐;(d)收集所述的纯化4-磺基苯基-[(1-氧烷酰基)
氨基]烷酸盐。在优选实施方式中,纯化混合物包括处理助剂,如
乙醇、
丙醇、
异丙醇、
丙酮和它们的混合物。