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Extraction of sulphates by long chain amines; Extraction des sulfates par les amines a longues chaines

Abstract

The extraction of sulphuric acid by long chain amines in organic solution has been studied with a view to determining the value of the stability constants of the amine sulphates and bi-sulphates formed. We have concentrated chiefly on uranium sulphate and thorium sulphate. The formulae of the complexes extractable with amines have been established, as well as the corresponding dissociation constants. We have observed that for uranium sulphate the formula of the complex depends only on the nature of the amine, whereas for thorium this formula varies with the amine structure. From the formulae determined and the value of the constants calculated, we have been able to establish the best conditions for uranium and thorium extraction and also for a separation of these two elements. Finally we propose an application of this study to the determination of uranium in ores, where the separation of uranium by this method is particularly easy and complete. (author) [French] L'extraction de l'acide sulfurique par des amines a longues chaines en solution organique a ete etudiee en vue de la determination de la valeur des constantes de stabilite des sulfates et bisulfates d'amines formes. Parmi les sulfates, nous nous sommes particulierement interesses au sulfate d'uranium  More>>
Authors:
Boirie, Ch [1] 
  1. Commissariat a l'Energie Atomique, Saclay (France). Centre d'Etudes Nucleaires
Publication Date:
May 15, 1959
Product Type:
Thesis/Dissertation
Report Number:
CEA-R-1262
Resource Relation:
Other Information: TH: These sciences; 25 refs
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; ABSORPTION SPECTROSCOPY; ACID SULFATES; AQUEOUS SOLUTIONS; CHEMICAL REACTION KINETICS; EQUILIBRIUM; EXTRACTION; GRAVIMETRIC ANALYSIS; MULTI-ELEMENT SEPARATION; PERCHLORIC ACID; PH VALUE; SPECTROPHOTOMETRY; TDA; THORIUM COMPLEXES; THORIUM SULFATES; TITRATION; TRIOCTYLAMINE; URANIUM COMPLEXES; URANIUM SULFATES; URANYL SULFATES
OSTI ID:
20940760
Research Organizations:
CEA Saclay, 91 - Gif-sur-Yvette (France); Faculte des Sciences de l'Universite de Paris, 75 (France)
Country of Origin:
France
Language:
French
Other Identifying Numbers:
TRN: FR07R1262094238
Availability:
Available from INIS in electronic form
Submitting Site:
FRN
Size:
60 pages
Announcement Date:
Nov 22, 2007

Citation Formats

Boirie, Ch. Extraction of sulphates by long chain amines; Extraction des sulfates par les amines a longues chaines. France: N. p., 1959. Web.
Boirie, Ch. Extraction of sulphates by long chain amines; Extraction des sulfates par les amines a longues chaines. France.
Boirie, Ch. 1959. "Extraction of sulphates by long chain amines; Extraction des sulfates par les amines a longues chaines." France.
@misc{etde_20940760,
title = {Extraction of sulphates by long chain amines; Extraction des sulfates par les amines a longues chaines}
author = {Boirie, Ch}
abstractNote = {The extraction of sulphuric acid by long chain amines in organic solution has been studied with a view to determining the value of the stability constants of the amine sulphates and bi-sulphates formed. We have concentrated chiefly on uranium sulphate and thorium sulphate. The formulae of the complexes extractable with amines have been established, as well as the corresponding dissociation constants. We have observed that for uranium sulphate the formula of the complex depends only on the nature of the amine, whereas for thorium this formula varies with the amine structure. From the formulae determined and the value of the constants calculated, we have been able to establish the best conditions for uranium and thorium extraction and also for a separation of these two elements. Finally we propose an application of this study to the determination of uranium in ores, where the separation of uranium by this method is particularly easy and complete. (author) [French] L'extraction de l'acide sulfurique par des amines a longues chaines en solution organique a ete etudiee en vue de la determination de la valeur des constantes de stabilite des sulfates et bisulfates d'amines formes. Parmi les sulfates, nous nous sommes particulierement interesses au sulfate d'uranium et au sulfate de thorium. Nous avons determine les formules des complexes extractibles avec les amines, ainsi que les constantes de dissociation correspondantes. Nous avons remarque que pour le sulfate d'uranium, la formule du complexe ne depend que de la nature de l'amine, alors que pour le thorium cette formule varie avec la structure de l'amine. Les formules determinees et la valeur des constantes calculees, nous ont permis de decrire les meilleures conditions d'extraction de l'uranium et du thorium ainsi que celles d'une separation de ces deux elements. Nous proposons enfin une application de cette etude au dosage de l'uranium dans les minerais, ou la separation de l'uranium par cette methode est particulierement facile et complete. (auteur)}
place = {France}
year = {1959}
month = {May}
}