PROCESS AND SYSTEM FOR RECOVERY OF INDUSTRIAL GRADE POTASSIUM SULPHATE FROM DISTILLERY BOILER ASH

摘要

The present invention relates to a process and system for recovery of potassium sulphate from distillery boiler ash. The invention in its one aspect provides a two-stage process and a system for the recovery of potassium sulphate from the distillery boiler ash, wherein in the first stage potassium sulphate crystals having purity in excess of 90% (i.e. industrial grade potassium sulphate) and a residue are obtained. In the second stage, the residue from the first stage is processed to obtain potassium sulphate of at least fertilizer grade and magnesium chloride.