Determination of the Distribution of Ferric Chloro Complexes in Hydrochloric Acid Solutions at 298 K

2019 ◽  
Vol 92 (12) ◽  
pp. 1928-1934 ◽  
Author(s):  
Masahito Uchikoshi
Keyword(s):  
Hydrochloric Acid ◽  
Acid Solutions ◽  
Chloro Complexes ◽  
Hydrochloric Acid Solutions

THE DETERMINATION OF ZIRCONIUM WITH BENZOYLPHENYLHYDROXYLAMINE

1960 ◽  
Vol 38 (12) ◽  
pp. 2488-2492 ◽  
Author(s):  
D. E. Ryan
Keyword(s):  
Hydrochloric Acid ◽  
Quantitative Determination ◽  
Sulphuric Acid ◽  
Rare Earths ◽  
Acid Solutions ◽  
Constant Composition ◽  
Hydrochloric Acid Solutions

Zirconium is completely precipitated by benzoylphenylhydroxylamine from 0.5 N acid solutions. The complex formed in sulphuric acid solutions has a constant composition, Zr(C13H10O2N)4, and is used for the direct weighing of zirconium; the factor is 0.0970. The product precipitated from hydrochloric acid solutions must be ignited to the oxide. The reaction is sensitive, 1 p.p.m. of zirconium being detectable, and quantitative determination of 0.2 mg is possible. Thorium and the rare earths do not interfere.

THE SEPARATION OF SMALL AMOUNTS OF THE PLATINUM METALS: 1. THE COLORIMETRIC DETERMINATION OF RHODIUM AND ITS SEPARATION FROM IRIDIUM

1961 ◽  
Vol 39 (12) ◽  
pp. 2389-2393 ◽  
Author(s):  
D. E. Ryan
Keyword(s):  
Hydrochloric Acid ◽  
Stannous Chloride ◽  
Colorimetric Determination ◽  
Acid Solutions ◽  
Platinum Metals ◽  
Hydrochloric Acid Solutions ◽  
Product Separation ◽  
Chromous Chloride ◽  
Made In

A method for separating small amounts of rhodium from iridium is described. In 3 to 9 M hydrochloric acid solutions, the amber-to-red complex of bivalent rhodium with 4,5-dimethyl-2-mercaptothiazole is formed after reduction of tervalent rhodium with chromous or stannous chloride. Rhodium is quantitatively separated from iridium by chloroform extraction of this product; separation can be made in solutions that have been fumed with sulphuric acid if chromous chloride is used for the prior reduction of the rhodium. The complex, after removal of the chloroform, is dissolved in dilute hydrochloric acid, and the optical density of the resulting colored solution is measured.

Extraction of indium(III) and antimony(III) from hydrochloric acid solutions by means of some neutral organophosphorus reagents

1981 ◽  
Vol 46 (8) ◽  
pp. 1906-1912 ◽  
Author(s):  
Oldřich Navrátil ◽  
Jiří Meindl ◽  
Jiří Kos
Keyword(s):  
Hydrochloric Acid ◽  
Organic Solvents ◽  
Organic Phase ◽  
Distribution Ratio ◽  
Acid Solutions ◽  
Chloro Complexes ◽  
Hydrochloric Acid Solutions

Distribution of indium(III) and antimony(III) was examined between hydrochloric acid solutions and solutions of tri-n-butylphosphate (TBP), trialkyl- and triarylphosphine oxides (TGPO, G = phenyl (P), n-butyl (B), or n-octyl (O)), or tetra-n-butylammonium chloride (R4NCl) in benzene or other organic solvents. The extractability of indium into benzene decreases in the order TOPO > TBPO > TBP ~ TPPO. In the case of TOPO and TBPO, there is a pronounced maximum on the plots of log DIn vs c(HCl) in the region of c(HCl) = 3-6 mol l-1; this applies also to other organic solvents. The composition of the species transferred into the organic phase is probably HInCl4.2 TGPO. The distribution ratio of antimony(III) attains considerable value even in the absence of the organophosphorus reagents, which indicates that Sb chloro complexes themselves are extracted.

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