Results 1 to 10 of about 59 (33)
Extracción de cromo con disolventes orgánicos. II parte. Extracción con TBP y con Primene 81R
Se estudia el empleo de un reactivo de carácter neutro (TBP) y otro de carácter básico (Primene 81R) para llevar a cabo la extracción del cromo presente en disoluciones acuosas.
L J Lozano
exaly +8 more sources
La amina primaria Primene 81R extrae al ácido sulfúrico de los medios acuosos para formar las sales sulfato y bisulfato. El estudio IR muestra que en la sal sulfato, el grupo sulfato presenta una simetría Td, mientras que en la sal bisulfato este grupo ...
FRANCISCO JOSÉ Alguacil
exaly +7 more sources
En el presente trabajo se ha estudiado la recuperación del vanadio contenido en soluciones procedentes del proceso de lixiviación de catalizadores agotados, por medio de la técnica de extracción con disolventes, empleando la amina primaria PRIMENE 81R ...
L J Lozano
exaly +7 more sources
On the Use of Pseudo-Protic Ionic Liquids to Extract Gold(III) from HCl Solutions. [PDF]
Solvent extraction of gold(III) from HCl media using pseudo-protic ionic liquids (PPILs) dissolved in toluene as the extractant phase is investigated. Three PPILs are generated from the reaction of commercially available amines and 1 M HCl solution and ...
Alguacil FJ, Robla JI.
europepmc +2 more sources
Se estudia la aplicación del Primene 81R como agente de extracción del cromo presente en residuos sólidos que poseen níquel, hierro y cobre. El residuo se lixivió con disolución de ácido sulfúrico hasta pH 3 y se investigó la oxidación del Cr(III) a Cr ...
D. de Juan, V. Meseguer, L. J. Lozano
doaj +1 more source
La recuperación de oro de disoluciones cianuradas tradicionalmente se ha realizado mediante cementación, adsorción en carbón o cambio ionico. Sin embargo, la técnica de la extracción con disolventes no se ha empleado con la misma asiduidad en este campo, pese a las posibilidades que presenta para separar y concentrar el metal de interés. En la presente
openaire +1 more source
Extraction equilibrium between primary amine primene 81R and iron(III) sulphate
The extraction equilibrium between aqueous iron (III) sulphate solutions and amine Primene 81R was studied. The results show that the free amine extracts iron(III) from these solutions. The extracted complex has been isolated and can be represented by the stoichiometric formula 4RNH2·Fe2(SO4)3.
FRANCISCO JOSÉ Alguacil
exaly +5 more sources
The extraction of iron(III) from aluminium sulphate solutions by the amine Primene 81R sulphate has been studied using 15 diluents of different types. The results are discussed in terms of the composition of the diluent and aggregation of the amine sulphate in solution, the dielectric constant and polar nature of the diluent, and interfacial tensions ...
FRANCISCO JOSÉ Alguacil
exaly +4 more sources
Some of the next articles are maybe not open access.
Gold(I) extraction equilibrium in cyanide media by the synergic mixture Primene 81R-Cyanex 923
Hydrometallurgy, 1994Abstract The extraction system formed by the synergic mixture primary amine Primene 81R and the phosphine oxide Cyanex 923, has been studied for a possible application in gold(I) extraction in cyanide media, taking into account the variables that could affect the extraction of this metal, such as agitation time, temperature, aqueous ionic strength ...
C Caravaca
exaly +2 more sources
Gold(I) extraction from cyanide media by the primary amine Primene 81R/iso-decanol system
Hydrometallurgy, 1994Abstract The extraction of gold(I) from cyanide solutions using the primary amine Primene 81R has been studied taking into account the variables temperature, agitation time, metal and amine concentration and aqueous ionic strength. The results show that gold(I) is extracted by means of a complex with the possible stoichiometric formula: [RNH 3 + Au(
C Caravaca
exaly +2 more sources

