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Preparation of Rutile Titanium Dioxide White Pigment by a Novel NaOH Molten‐Salt Process: Influence of Doping and Calcination
Author(s) -
Wang Y.,
Li J.,
Wang L.,
Qi T.,
Chen D.,
Wang W.
Publication year - 2011
Publication title -
chemical engineering and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.403
H-Index - 81
eISSN - 1521-4125
pISSN - 0930-7516
DOI - 10.1002/ceat.201100006
Subject(s) - calcination , rutile , titanium dioxide , molten salt , materials science , doping , dissolution , hydrolysis , chemical engineering , titanium , inorganic chemistry , nuclear chemistry , chemistry , catalysis , metallurgy , organic chemistry , optoelectronics , engineering
Rutile titanium dioxide (TiO 2 ) white pigment is prepared by a novel NaOH molten‐salt process. Titanium slag is decomposited by NaOH molten salt to obtain sodium titanate which is then converted into hydrate titanium dioxide (H 2 TiO 3 ) through acid dissolution and hydrolysis. Finally, TiO 2 white pigment is prepared by H 2 TiO 3 doping and calcinations. H 2 TiO 3 prepared by this innovative method is characterized and the influencing factors of doping and calcination of H 2 TiO 3 on pigmentary properties of TiO 2 are investigated. H 2 TiO 3 with certain characteristics could be prepared through the controlled hydrolysis step in the NaOH molten‐salt process. Good pigmentary properties of rutile TiO 2 white pigment are achieved by doping with suitable amounts of K 2 O, P 2 O 5 , Al 2 O 3 , and rutile nuclei, thereby approaching the quality of the commercial TiO 2 pigment standards.
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