کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
166892 1423392 2016 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Solvent extraction of lanthanum and cerium ions from hydrochloric acidic aqueous solutions using partly saponified 2-ethylhexyl phosphonic acid mono-2-ethylhexyl ester
ترجمه فارسی عنوان
استخراج حلال یون های لانتانیم و سریم از راه حل های آب آبی هیدروکلریک با استفاده از بخار آب 2-اتیل هگزیل فسفونی مونو-2-اتیل هگزیل استر
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
چکیده انگلیسی

In order to clarify the extraction process with saponified extractant, the solvent extraction experiments of rare earth elements (REEs), lanthanum and cerium, by using partly saponified 2-ethylhexyl phosphoric acid mono-2-ethylhexyl ester (EHEHPA, HL) from hydrochloric acidic solutions have been performed. The concentration of initial aqueous rare earth ion was in a range of 0.0010–0.1000 mol·L− 1; EHEHPA in a range of 0.2877–0.8631 mol·L− 1 with saponification rate of 0.3 (mole fraction), and the initial aqueous pH in a range of 1.00–4.00. Firstly, the extracted species were determined by the saturation extraction capacity method. Secondly, according to the equilibrium aqueous pH values, the extraction processes were divided into three different categories: extraction with saponified EHEHPA, extraction with un-saponified EHEHPA, and hydrolysis process. Finally, for the first two processes, in order to predict the distribution ratio, two semi-empirical calculation models were developed with. The calculation results are in good agreement well with the experimental data.

Lanthanum or cerium extraction with saponified 2-ethylhexyl phosphoric acid mono-2-ethylhexyl ester (EHEHPA, HL) as extractant was conducted. When concentration of EHEHPA was at 0.2877 mol·L− 1 (red) or 0.5754 mol·L− 1 (black), lanthanum (square and circle) or cerium (up triangle and down triangle) concentration at a range of 0.10 to 0.12 mol·L− 1, the EHEHPA concentration to REE concentration mole ratio, R, versus the initial aqueous pH, pHi, approaching a constant value 6 indicates that the complex formed during extraction process is RE (HL)3L3.Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chinese Journal of Chemical Engineering - Volume 24, Issue 1, January 2016, Pages 79–85
نویسندگان
, , , ,