| 摘要 |
<p>A process for the production of zirconium or hafnium rich aqueous solutions containing a substantial concentration of the hydroxychloride of the metal comprising the steps of providing a zirconium or hafnium containing chloride or oxychloride produced from zirconium or hafnium tetrachloride; oxidizing the chloride or oxychloride sufficiently to evolve substantially all the excess chlorine over that which would be present as the hydroxychloride of the metal; and recovering an aqueous solution of the resultant hydroxychloride having at least 25 % by weight of the metal calculated as its oxide and a chlorine to metal ratio of from about .75 to about 1.5. The aqueous solution is prepared by dissolving zirconium or hafnium tetrachloride in water before oxidizing. The process includes the aqueous solution being extracted with an organic solvent such as methyl isobutyl ketone which is capable of removing substantially all of the iron impurity present in the aqueous solution.</p> |
