METHOD OF PREPARING ULTRA-FRESH WATER FOR DRINKING AND HOUSEHOLD PURPOSES Russian patent published in 2013 - IPC C02F1/68 C02F1/46 

FIELD: chemistry.

SUBSTANCE: invention relates to the technology of preparing artificial mineralised (remineralised) water for drinking and household purposes and can be used in different fields - in engineering, medicine, food and cosmetic industries as well as in agriculture. According to the disclosed method, initial water is demineralised and divided into two portions. MgSO₄ is added to the first portion in an amount which provides content of Mg²⁺ cations of 20-25 mg/l and SO₄ ^2- anions of 80-100 mg/l, and the first portion is subjected to electrical activation. The obtained electrically activated water with redox potential from -5 mV to -500 mV is mixed with the second portion of demineralised water in ratio of (5-30):(70-95), respectively, brought to pH 6.5-6.9, and the obtained aqueous solution is mineralised by adding MgSO₄, ZnSO₄, Li₂SO₄, Cr₂(SO₄)₃ and KCl in an amount which provides the following ion composition, mg/l: K⁺=16…20; Mg²⁺=18…24; Zn²⁺=1.6…1.99; Li²⁺=0.06…0.16; Cr³⁺=0.01…0.08; Cr=15…18; SO₄ ^2-=75…100.

EFFECT: disclosed method enables to obtain ultra-fresh water of high quality with low hardness.

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