Abstract Cyclopentanol is an important intermediate in a production of many chemical specialties. This paper relates to a development of a new technology of indirect cyclopentene hydration in the presence of formic acid and presents the data of liquid-liquid equilibrium (LLE) for the ternary system of (cyclopentanol + water + cyclopentyl formate) under atmospheric pressure and within a temperature range from 298.2 K to 338.2 K. The experiments were conducted in a temperature-controlled glass cell and the received data were correlated with nonrandom two-liquid (NRTL) and universal quasichemical (UNIQUAC) equations in order to obtain binary coefficients describing LLE of the given system. A consistency of the experimental tie-lines data was validated by the Bachman and Othmer-Tobias equations and the data fitting accuracy was evaluated by the use of the calculated average absolute deviation and the root-mean-square-error values. According to our best knowledge, the LLE of this system have not yet been published elsewhere and the values of binary interaction parameters should be used for the design of the reactor and separation units in the process of indirect cyclopentene hydration.

中文翻译：

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三元系统（环戊醇 + 水 + 甲酸环戊酯）在 (298.2 - 338.2) K 处的液-液平衡：测量值和相关性

摘要 环戊醇是许多化工产品生产中的重要中间体。本文涉及甲酸存在下环戊烯间接水合新技术的开发，并给出了（环戊醇+水+甲酸环戊酯）三元体系在常压下的液-液平衡（LLE）数据。温度范围从 298.2 K 到 338.2 K。 实验是在温控玻璃池中进行的，将接收到的数据与非随机二液 (NRTL) 和通用准化学 (UNIQAC) 方程相关联，以获得描述 LLE 的二进制系数给定的系统。实验连接线数据的一致性通过 Bachman 和 Othmer-Tobias 方程进行验证，数据拟合精度通过使用计算的平均绝对偏差和均方根误差值进行评估。据我们所知，该系统的 LLE 尚未在其他地方发表，二元相互作用参数的值应用于设计间接环戊烯水合过程中的反应器和分离单元。