EDTA络合高钛渣熔盐反应产物中的Fe(上标 3+)及TiO2的制备

Complexation of ferric ions in acid using EDTA (ethylene diamine tetraacetic acid) as chelating agent from the dissolved reaction products of NaOH molten salt with titanium slag was studied. The effects of EDTA added amount, reaction time, pH and temperature on the extraction rates of Ti(superscript 3+) and Fe(superscript 3+) were investigated. The results showed that the extraction rate of ferric ions increased with increasing the amount of EDTA, prolonging the reaction time, reducing pH and raising the temperature. Spherical anatase TiO2 particles with average diameter of 100 nm could be obtained by hydrolyzing the residues at boiling point, and the content of TiO2 reached up to 99.3%.