Alkali metal nitrate purification

Details Alkali metal nitrate purification Alkali metal nitrate purification

1984-05-24

1986-02-04

Doll, John

Chemistry: physical processes

Physical processes

23304, 23305R, 23305F, 252 70, 252 71, C01F 1136

Patent

active

045683522

ABSTRACT:
A process is disclosed for removing contaminants from impure alkali metal nitrates containing them. The process comprises heating the impure alkali metal nitrates in solution form or molten form at a temperature and for a time sufficient to effect precipitation of solid impurities and separating the solid impurities from the resulting purified alkali metal nitrates. The resulting purified alkali metal nitrates in solution form may be heated to evaporate water therefrom to produce purified molten alkali metal nitrates suitable for use as a heat transfer medium. If desired, the purified molten form may be granulated and cooled to form discrete solid particles of purified alkali metal nitrates.

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