Development of a Liquid‐liquid Extraction System for Rhodium(III) by 2‐octylaminopyridine from Weak Malonate Media

Abstract

We have developed the extraction method of rhodium(III) from malonate media with 2‐octylaminopyridine (2‐OAP) in xylene at pH 8.0. The quantitative extraction of rhodium(III) with extractant was found by screening of different physicochemical parameters like malonate concentration, extractant concentration, pH, diluents, effect of temperature, aq: org phase ratio, loading capacity of 2‐OAP. The optimum condition was malonate=0.025 M, pH=8.0, 2‐OAP=0.05 M in xylene. The complete stripping of rhodium(III) from the loaded organic phase was carried out with 2 M HCl. Log‐log plot was investigated to determine the stoichiometry of the extracted species and it was found to be 1 : 2 : 1 (metal : acid :extractant). The versatility of the proposed method was checked for extraction and separation of rhodium(III) from binary, ternary mixture of associated metal ions as well as platinum group metals and from the synthetic solution of rhodium minerals and alloys.

Liquid- Liquid Extraction of Zinc(II) From Acid Media with N-N-Heptylaniline as an Extractant: Analysis of Pharmaceutical and Commercial Sample

“…An accurate, inexpensive and less laborious liquid-liquid extractive spectrophotometric procedure for the determination of zinc(II) in aqueous media has been developed [25]. Previously we have reported number of solvent extraction methods for the quantitative extraction of platinum group metals with amines [26][27][28][29][30][31][32][33][34][35][36][37][38][39]. In present research paper a systematic study of extraction of zinc(II) with N-n-heptylaniline in xylene has been carried out.…”

Highly proficient extraction separation of thorium(IV) from sulfuric acid solution using N-n-decylaniline: real sample analysis

“…Previously we have reported number of solvent extraction methods for the extraction separation and determination of other metal ions [25][26][27][28][29][30][31][32][33]. Here, we report the extraction behavior of thorium(IV) from H 2 SO 4 media by using N-n-decylaniline as an extractant.…”