Process for producing sodium bicarbonate from natural soda salts

Details Process for producing sodium bicarbonate from natural soda salts Process for producing sodium bicarbonate from natural soda salts

1991-11-20

1994-01-04

Heller, Gregory A.

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Alkali metal

423189, 423194, 4232062, 423420, 423422, 423423, 423424, C01D 702, C01D 718

Patent

active

052757943

ABSTRACT:
Production of sodium bicarbonate from natural soda deposits that may occur as natural brines or solid soda salts is disclosed. The alkalinity in these natural soda deposits consists of carbonates and bicarbonates. The carbonates are converted to bicarbonates by reacting sodium carbonate with ammonium bicarbonate which acts as a carbon dioxide carrier until all the sodium carbonate is exhausted. The solubility of the sodium bicarbonate is lowered by the presence of non-alkaline sodium salts, e.g., sodium chloride. The regeneration of the cyclic reagent (NH.sub.3) is done using the sodium bicarbonate formed by the double decomposition of sodium chloride and ammonium bicarbonate giving a final soda free brine exempt of contaminants foreign to its original components.

REFERENCES:
patent: 2005868 (1935-01-01), MacMullin
patent: 2671713 (1954-03-01), Miller et al.
patent: 3449067 (1969-06-01), Schmitt et al.
patent: 3868444 (1975-02-01), Frevel et al.
patent: 4283372 (1981-08-01), Frint et al.
patent: 4320106 (1982-03-01), Hentschel et al.
patent: 4337234 (1982-06-01), Hentschel et al.
patent: 4654204 (1987-03-01), Copenhafer et al.

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