Method of removing calcium from water containing calcium...

Details Method of removing calcium from water containing calcium... Method of removing calcium from water containing calcium...

2005-06-14

2005-06-14

Hruskoci, Peter A. (Department: 1724)

Liquid purification or separation

Processes

Making an insoluble substance or accreting suspended...

C210S726000, C210S915000

Reexamination Certificate

active

06905606

ABSTRACT:
A method for removing calcium from water containing a high concentration of calcium bicarbonate, permitting a reduction of the calcium bicarbonate equivalent to 200-500 ppm calcium to the level in accordance with the water quality standards for industrial use, not by a method using a large amount of heat and power as heating and deairing, but by a simple chemical treatment. Calcium hydroxide is added to waste water containing a high concentration of calcium in a form of calcium bicarbonate for making them react with each other, and removing calcium by fixing it to calcium bicarbonate.

REFERENCES:
patent: 2359748 (1944-10-01), Clemens
patent: 4036749 (1977-07-01), Anderson
patent: 4059513 (1977-11-01), Zadera
patent: 5240600 (1993-08-01), Wang et al.
patent: 5403495 (1995-04-01), Kust et al.
patent: 6331256 (2001-12-01), Kezuka et al.
patent: 48-14572 (1973-02-01), None
patent: 58-89985 (1983-05-01), None

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