Assertion: sodium carbonate | /r/CapableOf | allowin the excess of salts
Facets:
value: to settle
type: PURPOSE
Source sentences:
text: A combination of steps in a process for the manufacture of soda ash of high purity from complex or natural brines containing sodium carbonate, sodium chloride, and an amount of sodium sulphate in excess of four per cent, which consists in first modifying such brine to reduce its sodium sulphate content to less than fourper cent by stirring it with an excess of the solid phases of sodium chloride, and sodium carbonate monohydrate 61' sodium carbonate decah drate at a temperature above 20 C. until equilibrium is substantially attained, allowin the excess of salts to settle, and then chi mg the, clear decanted brine to such a temperature as to cause a substantial part of the sodium carbonate to crystallize out as sodium carbonate decahydrate without admixture of the crystale of sodium chloride or sodium sulphate decahydrate, removing and washing the mother li nor from such decahydrate crystals, and rther purif ing the sodium carbonate from mother iquor impurities by melting u the decahydrate crystals, evapcrating o a portion of the water from the solution so as to cause the crystallizing out of sodium carbonate monohydrate separating the monohydrate crystals rom the mother liquor and washing same, and driving'ofi' the water from the sodium carbonate monoh drate to form soda ash of high purity.