method for preparation of sodium percabonate regular rhomboedriques crystals

摘要

A process for the preparation of sodium percarbonate is disclosed in which concentrated hydrogen peroxide is caused to act generally in the presence of a crystallization modifier on a fluid suspension of sodium carbonate decahydrate in a substantially saturated solution of sodium carbonate, the sodium carbonate decahydrate being in a quantity such that the enthalpy of its dissolution compensates for the enthalpy of crystallization or formation of the sodium percarbonate or other exothermic phenomena. The process is applicable to obtaining sodium percarbonate, of which the elementary particle is a regular rhombohedric crystal.