PROCESS FOR RECYCLING SULPHURIC ACID CONTAINING METAL SULPHATE

摘要

A process for recycling sulphuric acid containing metal sulphate The present invention provides a process for recycling used sulphuric acid containing metal sulphates by evaporating the dilute sulphuric acid containing the dissolved metal sulphates to a content of from 40 to 85% of H2SO4, based on salt-free acid, separating the metal sulphates by filtration and rousing the separated sulphuric acid, the filtration taking place under excess pressure and compressed air being blown through the filter cake thereby formed for demoisturization. Le A 23 661