A PROCESS FOR THE RECOVERY OF SUPERIOR QUALITY AND SUPER WHITE INDUSTRIAL GRADE SALT FROM SUBSOIL/SEA BRINES

摘要

The present invention provides a process for the production of superior quality industrial grade salt with improved whiteness / brightness. The process comprises dosing of alum to the sea / sub-soil brine in the density range of 16-24 °Be' at a predetermined optimum level. The floes formed are allowed to settle under gravity and the clarified brine is subjected to either solar or forced evaporation for the crystallization of salt. The salt crystals so produced are defect free with a whiteness index of 88-89 and meeting all the specifications prescribed for industrial grade I salt. The process is simple and can be applied for any type of brine irrespective of its source and can be adopted by any salt works irrespective of its size and geographic location. The salt is devoid of any trace element impurities and can be fortified with iodine by known methods.