Hydrogen Peroxide → Sodium percarbonate

Participants

Reaction Steps

According to a second aspect of the present invention, in some embodiments there is provided a process for the manufacture of sodium percarbonate in which hydrogen peroxide, sodium carbonate and an aqueous liquor are introduced into a reaction vessel in which the hydrogen peroxide and sodium carbonate react forming sodium percarbonate which precipitates out of solution, the precipitated sodium percarbonate is separated from the mother liquor and recovered as product and at least a fraction of the mother liquor is recycled to the reaction vessel characterised in that at least a fraction of the sodium carbonate introduced into the reaction vessel is dissolved in mother liquor that has been separated from the precipitated sodium percarbonate and/or otherwise withdrawn from the reaction vessel and the mother liquor containing an enhanced concentration of sodium carbonate is thereafter recycled to the reaction vessel and at least a fraction of the sodium carbonate is introduced in solid form directly into the reaction vessel or into a recycle of liquor withdrawn from and returned into the reaction vessel.

Provenance & Evidence