Method for preparing solutions of zirconium sulfate(IV) and hafnium(IV) with the solution of oxalate

摘要

method for sulphate solutions of zirconium (iv) and hafnium (iv) with their oxalate solutions, characterised by the fact that the szczawiane ec decays by nadtlenodwusiarczanu ammonium in quantities of at least stoichiometric in relation to oxalate, advantageously in a molar ratio of ( ammonium persulphate): oxalate 1: 1 - 1.3: 1, whereby the reaction is carried out at elevated temperaturesadvantageously 100 - 130u00b0c, for several hours, preferably 2 - 3 hours.