MINERAL DRINKING WATER DEFERRITIZATION METHOD Russian patent published in 2004 - IPC

FIELD: nonalcoholic drinks.

SUBSTANCE: invention relates to industrial bottling of mineral drinking water and can be used for conditioning mineral waters containing less than 5 mg/dm³ ferrous iron. Method is based on oxidation of iron (II) with air releasing on graphite anode during electrolysis of water in closed electrolyzer. Amount of passed current should be at least equal to total permanganate oxidation demand for mineral water and iron(II). To prevent simultaneous release of elementary chlorine compromising organoleptic properties of water, electrolysis is carried out at low anodic current density: not higher than 50 a/m². Electrolyzed mineral water is stirred, settled, and filtered to remove iron. Thus clarified mineral water is disinfected and bottled. In order to prevent perturbation of carbonate-calcium equilibrium and associated salt precipitation, electrolysis of water and subsequent conditioning process stages are carried out at carbon dioxide partial pressure not below its equilibrium value. Applying present method at mineral water bottling factories allows bottled mineral water to be conditioned resulting in improved commercial appearance and thereby increased consumer's demand. Method as well allows original carbon dioxide to be preserved and prevents deposition of salts in apparatuses.

EFFECT: preserved natural composition and therapeutic properties of mineral water.