In the production process of titanium dioxide by sulfuric acid method,the iron content of metatitanic acid seriously affects the whiteness of titanium dioxide.In order to solve the problem,several coordination agents were used to react with ferrous ions to form complexes by using ferrous sulfate and different coordination agents,and then using these coordination agents to complexes with ferrous ions in metatitanic acid.And separate the ferrous complexes from metatitanic acid by washing and filtering in order to obtain metatitanic acid with low iron content,thus improve the quality of finished titanium dioxide.Experiment results showed that reacting with metatitanic acid and ortho phenanthroline solution,the larger the amount of ortho phenauthrolia used,the better for shedding of ferrous ions.
维普
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