PROCESS FOR THE HYDROLYSIS OF TITANIUM SULPHATE SOLUTIONS

摘要

Titanium sulphate solutions obtained in the sulphate process from titaniferous material are hydrolised by contacting at 88-98.degree.C water with a first titanium sulphate solution having a TiO2 titer of 230-260 g/1 and an acid factor of 1.75-1.85, adding at 88-98.degree.C to the mixture a second titanium sulphate solution having a TiO2 titer of 230-260 g/1 and an acid factor of 2.1-2.4 and heating the resulting mixture at boiling point. A volumetric ratio of from 3:100 to 12:100 is maintained between the first and the second solution. Titanium dioxide pigments having constant and improved characteristics are obtained from the resulting titanium hydroxide.