Process for preparing concentrated byproduct nitrate solutions

Details Process for preparing concentrated byproduct nitrate solutions Process for preparing concentrated byproduct nitrate solutions

1986-06-23

1988-07-12

Doll, John

Chemistry of inorganic compounds

Nitrogen or compound thereof

Oxygen containing

423 3, 423165, 423166, 423430, 423555, C01F 524

Patent

active

047568976

ABSTRACT:
A process is provided for preparing concentrated aqueous solutions of byproduct nitrate compounds from dilute aqueous streams containing said byproduct nitrate compounds, calcium ions and anionic species capable of reaction therewith at elevated temperatures. The process provides for the removal of the calcium ions by the addition of a source of carbonate ions to said stream to form solid, particulated calcium carbonate therein, the separation of the solid particulate from the stream, the neutralization of the stream and concentration of the stream to provide a concentrated aqueous solution containing the byproduct nitrate compound.

REFERENCES:
patent: 1924041 (1933-08-01), Johnson
patent: 2018955 (1935-10-01), Heckert et al.
patent: 2044942 (1936-06-01), Heckert et al.
patent: 4242318 (1980-12-01), Brahm et al.
patent: 4321235 (1982-03-01), Mouret et al.
patent: 4421729 (1983-12-01), Chiang et al.

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