| abstract |
usenan iron (II) sulphate-containing precipitate, the iron (II) sulphate monohydratencontainsnand is producible by a process comprising concentrationnan iron (II) sulphate-containing second-hand sulfuric acid from titanium dioxide productionnafter the sulphate process and the separation of sulfuric acid fromnthe precipitate obtained,nthe precipitatena titanium content of 5 to 15 wt .-%, based on iron and / orna manganese content of 1.5 to 4 wt .-%, based on iron, andnan average crystallite size of lessnthan 2 μm,nto reduce the solublenChromate content in cement. |