Method of producing water having a reduced salt content

Details Method of producing water having a reduced salt content Method of producing water having a reduced salt content

1993-12-28

1994-12-27

Niebling, John

Chemistry: electrical and wave energy

Processes and products

Electrostatic field or electrical discharge

2041825, 204301, C02F 1469

Patent

active

053762509

ABSTRACT:
A method of making water having a low salt content by desalination comprising the steps of alternately arranging pluralities of cation exchange membranes and monovalent anion selective anion exchange membranes or pluralities of anion exchange membranes and monovalent cation selective cation membranes between electrodes thereby alternately forming pluralities of the diluting cells and concentrating cells of an electrodialysis tank; feeding a salt containing water including hardly soluble salts to the plurality of diluting cells of the electrodialysis tank; feeding electricity to the electrodes; maintaining the salt concentration of the concentrated solution in the plurality of concentrating cells to a value of not less than 700 ppm; and retaining as much as possible the polyvalent anions forming the hardly soluble salts in the salt containing water.

REFERENCES:
patent: 3933617 (1976-01-01), Yamamoto et al.
patent: 4802966 (1989-02-01), Aoki et al.
patent: 5094732 (1992-03-01), Oldani et al.

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