Exploitation of sambhar lake bitterns
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Date
2011-11-23T09:36:49Z
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Abstract
A process for recovering sodium solphate, sodium chloride and sodium carbonate from hquid and solld bitterns and sub-standard salt,worked out on the basls of phase rule studles, is described. it consists of the following steps:(1)elimination of algae from the liquid bittern or aqueous extracts of solid bitterns by chlorine treatment;(2)adjustment of the composition of the solution and chilling it to 0'C.;(3)separation of Na2SO4.10H2O by centrifuging;(4)dehydration and purification of sodium sulphate by solar heat;(5)recovery of sodium chloride by solar evaporation of desulphated llquor until the liquid reaches 10 per cent sodium carbonate strength;and(6)carbonation of the desalted liquor for the recovery of sodium carbonate as bicarbonate.