PROCESS FOR PREPARING SODIUM PERCARBONATE

摘要

A process for preparing sodium percarbonate, 2Na2CO3.3H2O2, starting from sodium carbonate and hydrogen peroxide having a H2O2 concentration of from 40 to 80% by weight. The reaction takes place in the presence of a percarbonate stabilizer, for example magnesium silicate, and under reduced pressure. The reduced pressure and feeding rate of hydrogen peroxide to the reactor containing sodium carbonate are adjusted so as to maintain the reaction mass at a temperature from 20 DEG to 40 DEG C. The product is then dried.