Purification of alkali metal halides

Details Purification of alkali metal halides Purification of alkali metal halides

1975-06-17

1976-01-13

Stern, Edward

Chemistry of inorganic compounds

Halogen or compound thereof

Binary compound containing metal

423491, 423500, C01D 320, C01D 304, C01D 310, C01D 312

Patent

active

039325970

ABSTRACT:
A new process or method has been developed whereby the purity of metal halides, prepared by conventional methods, can be significantly upgraded. The process, which includes a scrubbing of metal halides with a halide-source species in the vapor phase, has been shown to be effective not only in reducing the concentration of oxyanion impurities and volatile cation halide impurities, but effective in reducing hydroxyl ion (OH.sup.-) contaminations as well.
Metal halides purified by this method are particularly useful as starting materials for growing optically pure metal halide crystals.

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patent: 3840651 (1974-10-01), Ireland

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