Titanium dioxide white pigments with rutile phase were prepared by using metatitanic acid as raw material, which was hydrolyzed from industrial low concentrationTiOSO4 solution via the short sulfate process. The synergistic interactions of the addition amount of salt treatment agents (ZnO, K2O, P2O5) and the highest calcination temperature were investigated by using four-factor quadric orthogonal regression test. The metatitanic acid and rutile TiO2 white pigment were characterized by XRD, particle size distribution test and pigment properties determination. The different salt addition amount and the highest calcination temperature had important impacts on the achromatic power (TCS) for rutile TiO2 pigments. The synergistic interactions regression model to TCS was established and showed highly repeatability and stability, which could be used to forecast the pigment properties and preset the optimal salt treatment and calcination conditions. And the optimal salt treatment conditions were ZnO of 0.36%, K2O of 0.70%, P2O5 of 0.20%, and the highest calcination temperature was of 850 0C.

Synergistic effects of salt treatment and calcination temperature on TiO2 pigment production

ACS Spring Meeting 2021

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