The synthesis of titanium dioxide (TiO2) from ilmenite using sulfate processes still become a problem to get its pigment with high purity and operation cost lower. The purpose of research is to show the coagulant influence and characterization of TiO2 recovery from TiOSO4 solution so product TiO2 with high purity, low operating expenses, and fulfills specification of TiO2 appropriate market. The research method was sol gel process that TiOSO4 solution resulted from the extraction of Bangka ilmenite using sulfate process is mixed with a coagulant added H2O solvent for hydrolysis process. This process has been done at the hydrolysis temperature of 90 C in agitated ang refluxed reactor to form TiO2 gel.The result of research shows that the longer hydrolysis process will produce the higher TiO2 powder and Fe2O3 impurities will be. The higher acidity degree of hydrolysis process will increase an oxidation degree from Fe2+ ion to Fe3+ ion that this process cause yellowing TiO2 powder. The hydrolysis process for 2 h (pH = 0) can decrease significantly an impurity grade of iron that the whiteness degree of TiO2 become higher, i.e. 96,30 percent. The morphology of titanium dioxide resulted is uniform nano particle that the hydrolysis process with adding a coagulant of dextrine has TiO2 particle size bigger than a coagulant of TiO2 or without adding a coagulant. However the diffraction of titanium dioxide crystalline increased when the hydrolysis process has been done with adding a coagulant of TiO2.
Proceeding of the 12th International Conference on QIR (Quality in Research), hlm: 1315-1321
(2011)
v. 5.4.1 build 430-80361bf
