The solubility of 5,5-dimethylhydantoin (DMH) in 12 pure solvents including water, methanol, ethanol, 1-propanol, isopropyl alcohol, 1-butanol, isobutyl alcohol, 2-butanol, 1-pentanol, ethyl acetate, propyl acetate, and acetonitrile was measured at temperatures from 283.15 to 323.15 K under atmospheric pressure by a gravimetric method. The values of the mole fraction solubility of DMH in these solvents increase with increasing temperature and present the following order at a fixed temperature: methanol > ethanol > 2-butanol > isopropyl alcohol > 1-propanol > isobutyl alcohol (1-butanol) > 1-pentanol > water > acetonitrile > ethyl acetate > propyl acetate. They were mathematically correlated by the modified Apelblat equation, van’t Hoff equation, λh equation, and the Wilson model. The results showed a satisfactory correlation for each model.

中文翻译：

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5，5-二甲基乙内酰脲在283.15至323.15 K的温度下在12种纯溶剂中的溶解度测量和数据相关性

5,5-二甲基乙内酰脲（DMH）在12种纯溶剂中的溶解度，包括水，甲醇，乙醇，1-丙醇，异丙醇，1-丁醇，异丁醇，2-丁醇，1-戊醇，乙酸乙酯，乙酸丙酯，用重量法在大气压下于283.15至323.15K的温度下测量乙腈。DMH在这些溶剂中的摩尔分数溶解度值随温度升高而增加，并在固定温度下呈以下顺序：甲醇>乙醇> 2-丁醇>异丙醇> 1-丙醇>异丁醇（1-丁醇）> 1 -戊醇>水>乙腈>乙酸乙酯>乙酸丙酯。通过修正的Apelblat方程，van't Hoff方程，λh方程和Wilson模型对它们进行数学关联。