Process for preparing titanium dioxide in the form of spherical particles by hydrolysis of Ti (IV)

摘要

There is described a process for preparing titanium dioxide in the form of spherical particles having a particle size distribution, in terms of dw/dn, of ≦ 2, by hydrolysis of strongly acidic solutions of Ti(IV), wherein the molar ratio SO₄=/Ti(IV) is at least 1.5, in the presence of cationic polyelectrolytes having a molecular weight of more than 1 million and an ionicity of at least 3 milliequivalents per gram.