2019 5 22 ensp 0183 ensp EXTRACTION OF POTASH FROM K FELDSPAR MINERAL BY ACID AND MOLTEN SALT LEACHING PROCESSES M KUMANAN G SATHYA V NANDAKUMAR amp L JOHN BERCHMANS Electropyrometallurgy Division CSIR Central Electrochemical Research Institute Karaikudi India ABSTRACT Potassium is one of the three essential nutrients for the plant growth