procedures for the recovery of sulfuric acid in titanium dioxide industry.

摘要

The invention relates to a process for the recovery of sulphuric acid, which is produced as dilute acid in the production of TiO2 by the sulphate process, in which the concentration of the dilute acid intended for evaporation and separation of the metal sulphates is increased by adding dilute acid, or washing liquid having a low H2SO4 content which is produced during washing of the TiO2 hydrolysate, to the titanyl sulphate hydrolysis.