Sodium Chloride → Calcium Carbonate

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Reaction Steps

A process for the preparation of sodium chloride from crude brine containing calcium ions and magnesium ions which comprises adding sodium carbonate, calcium hydroxide and sodium sulphate to said brine to form calcium carbonate, magnesium hydroxide and calcium sulfate as insoluble compounds; separating said insoluble compounds from the crude brine to obtain a purified brine; evaporating water from the purified brine and separating the sodium chloride crystallized in the process leaving a mother liquor; and, crystallizing and separating sodium sulfate from the mother liquor and returning the sodium sulfate to the crude brine to be purified.

Provenance & Evidence