Gadre, G.T.Rao, A.V.Bhavnagary, H.M.2011-11-222011-11-222011-11-22http://hdl.handle.net/1968424/83A process has been worked out by which potassium chloride of 97-99 per cent purity can be obtained from the waste bittern of the marine salt industry. the desulphation of the bittern is carried out using commercial,calcium chloride. sulphate-free bittern deposits,on concentration,the double salt,KCL.MGCL2.6H2O, from which potassium chloride is recovered by leaching it with cold water or by cooling a supersaturated solution of the double salt.enArticle