摘要:
Transition metals are recovered from an organic medium by liquid-liquid extraction into anaqueous phase in the presence of a water-soluble cyclic phosphate, forming an aqueous extract phase containing the metals in complex conbination with the cyclic phosphate.
摘要:
Méthode pour récupérer le vanadium à partir d'une solution aqueuse de séparation de solvant de bicarbonate d'ammonium. La méthode comprend le chauffage de la solution aqueuse à une température allant de 70oC à 100oC, l'addition d'acide sulfurique pour maintenir le pH dans une gamme de 6,5 à 8,5 et l'addition de sulfate d'ammonium pour précipiter le vanadium.
摘要:
Vorliegende Erfindung betrifft eine Verfahren zur Reduktion von Metallionen höherer Oxydationsstufen zu deren niederen Oxydationsstufen mit Hilfe von Ferrophosphor als Reduktionsmittel.
摘要:
A metal fluoride whose metal is Mo, W, Nb, Ta, V, Re, Ti, Zr, Hf, Co, Ni, Cr, Sb, Sn, Zn, Cd, Pb, Al or a rare earth element is produced by heating a fluorine-containing ammonium salt of the metal, to convert it into the metal fluoride.
摘要:
(57) Silicophosphoaluminates are crystallized from a two-phase reaction mixture comprising sources of silicon oxide, aluminum oxide and phosphorus oxide and a suitable directing agent. The silicon, phosphorus and aluminum components of such silicophosphoaluminates may, optionally, be replaced with other elements in the plus 4, 5 and 3 valence states, respectively. The crystalline oxides so produced have ion exchange properties and are readily convertible to catalytically active material.