Density and viscosity of aqueous solution of K2CrO4/KOH mixed electrolytes

郭雅杰; 徐红彬; 郭奋; 郑诗礼; 张懿

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Density and viscosity of aqueous solution of K2CrO4/KOH mixed electrolytes

机译：K2CrO4 / KOH混合电解质水溶液的密度和粘度

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The physicochemical properties are very important in theoretical investigation of aqueous electrolyte solution and industrial design of hydrometallurgical processes. In the green hydrometallurgical process of chromite ore with sub-molten salt medium of KOH, the ternary system of KOH+K2CrO4+H2O is essential to process control and industrial operation. In order to satisfy the needs of both fundamental research and industrial application, the dynamic viscosity (η) and density (ρ) of mixed aqueous electrolyte solution of KOH and K2CrO4 were measured over a temperature range from 15 to 60 ℃ by using Ubbelohde-type capillary viscometers and a series of densimeters, respectively. The temperature is controlled to an accuracy of ±0.01 ℃ throughout the experiment with thermostat. The dynamic viscosity and density of the ternary systems are performed as functions of chromate and hydroxide concentration and temperature. The regression equations for viscosity and density are obtained with a least-square method and the calculated values are consistent well with the experimental data. The semi-empirical equation obtained will be helpful and instructive to industrial application.

机译：物理化学性质在电解质水溶液的理论研究和湿法冶金工艺的工业设计中非常重要。在铬酸钾矿石亚熔融盐介质的铬铁矿绿色湿法冶金过程中，KOH + K2CrO4 + H2O的三元体系对于过程控制和工业运行至关重要。为了满足基础研究和工业应用的需要，使用Ubbelohde型在15至60℃的温度范围内测量了KOH和K2CrO4混合电解质水溶液的动态粘度（η）和密度（ρ）。毛细管粘度计和一系列密度计。在整个实验过程中，使用恒温器将温度控制在±0.01℃的精度内。三元体系的动态粘度和密度是铬酸盐和氢氧化物浓度及温度的函数。用最小二乘法得到粘度和密度的回归方程，计算值与实验数据吻合较好。所获得的半经验方程将有助于工业应用。

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来源
《中国有色金属学报：英文版》 |2010年第S1期|P.32-36|共5页
作者
郭雅杰; 徐红彬; 郭奋; 郑诗礼; 张懿;
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作者单位

Research Center of the Ministry of Education for High Gravity Engineering and Technology, Beijing University of Chemical Technology;

National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology, Institute of Process Engineering, Chinese Ac ademy of Sciences;

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Density and viscosity of aqueous solution of K2CrO4/KOH mixed electrolytes

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