This invention deals with a high efficiency purification method of potassium carbonate solution, which separates potassium carbonate out from solution containing sodium, chlorine etc. impurities, and attains the aim of purification of potassium carbonate solution. Said method is by adding precipitant and precipitation assistant into crude potassium carbonate solution, thus a novel complex salt compound is obtained, which is hard soluble in concentrated potassium carbonate solution, hence 95% and over, overall recovery rate can be attained, while content of Na2CO3 and KCl are both less than 0.1% of K2CO3 in potassium carbonate solution purified. Said method provided by this invention overcomes effectively disadvantage of the existing purifying method and attains the aims of simplification of processings, lowering of the first cost and improvement of the quality. |