ISSN print edition: 0366-6352
ISSN electronic edition: 1336-9075
Registr. No.: MK SR 9/7
Formation of hydrated titanium dioxide from seeded titanyl sulphate solution
Barbara Grzmil, Daniel Grela, and Bogumił Kic
Institute of Chemical and Environment Engineering, Szczecin University of Technology, ul. Pułaskiego 10, PL 70 322 Szczecin, Poland
Received: 9 April 2008 Revised: 23 September 2008 Accepted: 25 September 2008
Abstract: The paper analyses the influence of various kinds and amounts of titanium dioxide nuclei addition to a solution of titanyl
sulphate on the conversion degree of TiOSO4 to hydrated titanium dioxide and sulphuric acid. An industrial solution of titanyl sulphate used to produce titanium white
was used in the present investigations. It was found that the course of hydrolysis clearly depended on the investigated parameters.
The anatase nuclei calcined at 373 K and 333 K and rutile nuclei increased the degree of titanyl sulphate hydrolysis as compared
to non-nucleation hydrolysis. The final degree of hydrolysis was by 1–2 % higher than that achieved without any nuclei addition.
The constant rates of both colloidal intermediate and final crystalline products formation were higher in the hydrolysis process
with both anatase nuclei after heat treatment at lower temperature and rutile nuclei in comparison to the same processes conducted
in the absence of these nuclei.
Keywords: hydrated titanium dioxide - hydrolysis - titanyl sulphate - nucleation
Full paper is available at www.springerlink.com.
Chemical Papers 63 (2) 217–225 (2009)
Tuesday, September 22, 2020