Results 21 to 30 of about 59 (33)

Study of the amine primene 81R sulphate-Fe2(SO4)3 extraction equilibrium system at low temperatures

Polyhedron, 1986
Abstract The extraction of iron(III) from aqueous sulphate solutions by Primene 81R sulphate at low temperatures was studied as a function of iron(III) and amine sulphate concentrations. In the range of temperatures between 8 and 5°C a complex with the stoichiometric formula 4(RNH3)2SO4·[Fe(OH)SO4]2 is extracted.
FRANCISCO JOSÉ Alguacil
exaly   +4 more sources

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SOLVENT EXTRACTION OF POLYVANADATES FROM SULPHATE SOLUTIONS BY PRIMENE 81R. ITS APPLICATION TO THE RECOVERY OF VANADIUM FROM SPENT SULPHURIC ACID CATALYSTS LEACHING SOLUTIONS

Solvent Extraction and Ion Exchange, 2001
Recovery of vanadium from a spent catlaysts leaching process has been studied using primary amine PRIMENE 81R, resulting in an industrial multistage process for the treatment of these effluents. An extraction mechanism for V(V) is proposed for this amine in acidic media, verifying the influence of pH on the process. Adequate ranges for the variables: O/
Luis J. Lozano, Diego Juan
exaly   +2 more sources

Comparative study of solvent extraction of vanadium from sulphate solutions by primene 81R and alamine 336

Minerals Engineering, 2003
A comparative study of the solvent extraction of vanadium in sulphate media using primary amine PRIMENE 81R and tertiary amine ALAMINE 336 dissolved in kerosene has been carried out. pH conditions for both amines, mechanism proposal and extraction isotherms have been determined, yielding best results for primary amine.
exaly   +2 more sources

The extraction of iron(III) from aqueous sulphate solutions by primene sulphate

Hydrometallurgy, 1986
A study of the extraction of iron(III) from aqueous sulphate media by the primary amine Primene 81R at 50°C has been made. The compound extracted from the organic phase with Primene 81R sulphate in kerosene has been isolated and recrystallized from a ...
FRANCISCO JOSÉ Alguacil
exaly   +2 more sources

Corrigendum to “Comparative study of solvent extraction of vanadium from sulphate solutions by primene 81R and alamine 336 [Minerals Engineering 16 (2003) 291–294]”

Minerals Engineering, 2004
L.J Lozano, C Godı́nez
openaire   +1 more source

Extraction of phenol from water by primary amine primene JMT

Emerging Contaminants, 2022
Pengge Ning
exaly  

Neodymium recovery from NdFeB magnet wastes using Primene 81R·Cyanex 572 IL by solvent extraction

Journal of Environmental Management, 2018
Sandra Pavon, A Fortuny, Ana Maria Sastre   +2 more
exaly  

Extraction of Ag(I) from aqueous thiocyanate solution with Primene JMT or TOA

Hydrometallurgy, 2000
Sumiko Sanuki, Hiroshi Majima
exaly  

Rare earths separation from fluorescent lamp wastes using ionic liquids as extractant agents

Waste Management, 2018
Sandra Pavon, A Fortuny, Ana Maria Sastre   +2 more
exaly  

Transport of Au(CN)2− across a supported liquid membrane using mixtures of amine Primene JMT and phosphine oxide Cyanex 923

Hydrometallurgy, 2004
FRANCISCO JOSÉ Alguacil
exaly