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Citation: Sun Ducheng, Gu Li, Li Deqian. KINETIC STUDY ON THE EXTRACTION OF NEODYMIUM BY P₃₅₀ IN NITRIC ACID SOLUTION[J]. Chinese Journal of Applied Chemistry, ;1993, 10(6): 76-79. shu

KINETIC STUDY ON THE EXTRACTION OF NEODYMIUM BY P₃₅₀ IN NITRIC ACID SOLUTION

Sun Ducheng ¹ ,
Gu Li ¹ ,
Li Deqian ²

1.
1. Department of Chemistry, Xingjiang University, Urumqi;
2.
2. Laboratory of Rare Earth Chemistry and Physics, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, 130022 Changchun

Received Date: 22 December 1992
Available Online: 26 April 1993
Fund Project:

The kinetics of the extraction of Nd(Ⅲ) by di-(1-methyl heptyl)methyl phosphonate (P₃₅₀) in nitric acid solution has been studied by using the constant-interface cell technique. The effects of the stirring speed,interfacial area between two phases,temperature,and concentration of P₃₅₀,NO₃^-,amd H⁺ on the extraction rate have been examined. The apparent activation energy was found to be 11.8kJ/mol. The experimental results showed that the rate-controlling step may be the chemical reaction at the interface. A cation exchange mechanism has been proposed.
- di-(1-methyl heptyl)methyl phosphonate,
- neodymium,
- kinetics,
- extraction
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KINETIC STUDY ON THE EXTRACTION OF NEODYMIUM BY P₃₅₀ IN NITRIC ACID SOLUTION