The production process of zeolites using the residues from the synthesis of aluminium sulfate from bauxite.

摘要

The production process of zeolites using the residues from the synthesis of aluminium sulphate, from bauxite. The present invention provides a simple process for production of different types of synthetic zeolites, and raw material waste resulting from the synthesis of aluminium sulfate from bauxite, in two stages combined and parallel production (a) and (b).The process has the innovative aspect and environmental, because the current processes to obtain zeolites using raw material in nature, and this process uses the reutilization of waste for the same purpose, thus minimising the environmental impacts caused by mining and the deposition of large The quantities of these waste synthesis of aluminium sulphate in landfills.In the route established in this process, in step (a) waste resulting from the synthesis of aluminium sulfate from bauxite, undergo several unit operations: dilution, neutralization and successes of pH; filtering and result in the effluent to be treated at the end of this ETAP The; drying, calcination, cooling and grinding.Results the synthetic zeolites; in step (b) the waste used suffer leaching; filtration and evaporation resulting in aluminum sulfate, which can be reused in liquid or solid form. In this step, the cake from the filtration is sent for processing in the first item in the step (a)