METHOD OF PROCESSING MINERALIZED WATERS Russian patent published in 1999 - IPC

FIELD: food industry. SUBSTANCE: invention relates to mineralized sulfate-chloride waters with sulfate/chloride ratio at least 1:6 occurring in mining, chemical, and oil-and-gas areas. Processing includes water-treating stage, concentration stage, and crystallization and centrifugation stages. Crystallization is carried out at total salt content 50-100 g/l, and concentration involves inverse osmosis technique at operation pressure 1.5 to 4.0 Mpa, sulfate/chloride ratio being increased during this operation by at least 2.5 times. Low-mineralized water processing is developed wherein virtually all original solution is converted into drinking-quality water and sodium sulfate decahydrate. EFFECT: considerably reduced power consumption. 9 cl, 1 dwg, 1 tbl