@inbook{4dfe2bf0da4c4fa7826696d9b64fe898,
title = "Separation of cobalt and nickel ions with 2-ethylhexyl phosphonic acid mono-2-ethylhexyl ester dissolved in kerosene",
abstract = "The extraction equilibria of cobalt and nickel ions between lithium nitrate solution and 2-ethylhexyl phosphonic acid mono-2-ethylhexyl ester (HEHEHP) dissolved in kerosene are studied at 25.0 \& 0.1°C. The experimental results indicated that the distribution ratio of each metal is increased with increasing the HEHEHP concentration in the organic phase as well as the pH value of aqueous solution. However, the distribution ratio is independent of the metal ions concentration at constant pH value and HEHEHP concentration. The equilibrium constants of cobalt and nickel are found to be 5.76 × 10−6and 5.66 × 10−7m3kmol, respectively. Polyvinylidene difluoride membrane impregnated with HEHEHP in kerosene solution as the supported liquid membrane, have been used for the investigations of the permeation and separation of cobalt and nickel ions, from lithium nitrate solution to nitric acid solution through the supported liquid membranes. The permeabilities of metal ions are found to be dependent on the stirring rate, pH value of feed solutions, and carrier concentration in supported liquid membrane. The experimental data also show that the separation factor increases with increasing the stirring rate and pH value of feed solution. However, the separation factor decreases with the concentration of HEHEHP in the organic phase.",
author = "Huang, \{Ting Chia\} and Tsai, \{Teh Hua\}",
year = "1992",
month = jan,
day = "1",
doi = "10.1016/B978-0-444-88677-4.50071-4",
language = "???core.languages.en\_GB???",
series = "Process Metallurgy",
pages = "1529--1534",
booktitle = "Process Metallurgy",
}