Treatment of water to remove certain ions therefrom

Details Treatment of water to remove certain ions therefrom Treatment of water to remove certain ions therefrom

1977-02-22

1977-11-22

Bascomb, Jr., Wilbur L.

Liquid purification or separation

With alarm, indicator, register, recorder, signal or...

Responsive to fluid flow

210 53, 210234, C02B 120, C02B 502, C02C 502, B01D 2101

Patent

active

040595137

ABSTRACT:
High sulfate content water is treated in a multistage process to remove sulfate and hardness. Sulfate concentration is reduced in the first stage of the process by addition of calcium hydroxide. Calcium concentration is reduced in the second stage of the process by reaction of carbon dioxide or bicarbonate and calcium and hydroxide ions from the first stage of the process, forming insoluble calcium carbonate.

REFERENCES:
patent: 2359748 (1944-10-01), Clemens
patent: 3345288 (1967-10-01), Sontheimer
patent: 3399975 (1968-09-01), Otten
patent: 3419493 (1968-12-01), Pangle
patent: 3446731 (1973-05-01), Harsh
patent: 3627679 (1971-12-01), Fuller
patent: 3736254 (1973-05-01), Croom
patent: 3833463 (1974-09-01), Croom
patent: 3839199 (1974-10-01), Weiss
patent: 4017391 (1977-04-01), Black

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