Controllable Synthesis of Battery-Grade Iron Oxalate with Waste Ferrous Sulfate from Titanium Dioxide Production

摘要

In order to utilize the waste ferrous sulfate from titanium dioxide production effectively, a statistical experimental design was used to optimize the preparation process parameters for synthesis of battery-grade iron oxalate. The controllable synthesis of iron oxalate with different particle size and purity was investigated to further illustrate the effects of various factors on iron oxalate growth. Results show that the reaction temperature plays a key role on both material's purity and size. The influence of reaction factors can be attributed to the change of thermodynamics and kinetics which leads to the different crystal nucleation and growth process. The model has a well fitted response and a good liner correlation with the data of variance analysis. The analytical results in this paper demonstrate that the preparation of battery-grade iron oxalate is a new way to utilize waste ferrous sulfate, which offers an opportunity for green and safe industrial production.