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US07955607B2 Method of evaluating evenness of suplatast tosilate crystal, even crystal, and process for producing the same 有权
评价超晶体硅酸盐晶体，均匀晶体的均匀性及其制造方法

Method of evaluating evenness of suplatast tosilate crystal, even crystal, and process for producing the same
Abstract:
Provided are a method for evaluating evenness of suplatast tosilate crystals; stable suplatast tosilate crystals exhibiting evenness in optical purity; and a method for producing the suplatast tosilate crystals.The method for evaluating evenness of suplatast tosilate crystals includes: (a) a step of adding a solvent to suplatast tosilate crystals to thereby dissolve 3% or less of the crystals in the solvent, and subjecting a portion of the supernatant of the resultant suspension to optical purity measurement, and (b) a step of adding a solvent to the remaining suspension to thereby dissolve the entirety of the suspension in the solvent, and subjecting a portion of the resultant solution to optical purity measurement, wherein the optical purity as measured in the step (a) is compared with the optical purity as measured in the step (b). The suplatast tosilate crystals exhibits excellent evenness and thermal stability. The method for producing the suplatast tosilate crystals is also provided.
Abstract(Chinese):

提供了一种评估超晶硅酸盐晶体的均匀性的方法; 稳定的suplatast表现出光学纯度均匀的硅酸盐晶体; 以及制备超晶硅酸盐晶体的方法。 用于评价超晶硅酸盐晶体的均匀度的方法包括：（a）向溶胶中添加溶剂以过滤硅酸盐化溶液，从而溶解溶剂中的3％或更少的晶体，并将所得悬浮液的一部分上清液 光学纯度测定，以及（b）向剩余的悬浮液中添加溶剂从而溶解溶剂中的全部悬浮液的步骤，对所得溶液的一部分进行光学纯度测定，其中测定的光学纯度 将步骤（a）与在步骤（b）中测得的光学纯度进行比较。 超级硅酸盐晶体显示出优异的均匀性和热稳定性。 还提供了生产超晶硅酸盐晶体的方法。

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