Chemistry of inorganic compounds – Halogen or compound thereof – Binary compound containing metal
Patent
1988-05-06
1990-03-20
Heller, Gregory A.
Chemistry of inorganic compounds
Halogen or compound thereof
Binary compound containing metal
423 72, 423 76, 423135, 423495, C01F 300, C01F 748, C01B 900
Patent
active
049100092
ABSTRACT:
The process for purifying a contaminated chloro, bromo or iodo precursor salt of zirconium, hafnium or aluminum by means of providing a molten thermal body of one or more alkali or alkaline earth metal halides and the precursor salt containing impurities, maintaining the body at a temperature sufficient to volatilize the precursor salt away from its impurities while effecting a reducing condition in the body by means of a fluid, mobile reducing agent which is non-reducing of said precursor salt, and isolating the purified volatilized precursor salt from the body. The ultra purified isolated volatilized precursor salt can then be reacted with a fluorinating agent to produce the highly purified fluoride for use in optical fiber grade glass or the like.
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Heller Gregory A.
Teledyne Industries Inc.
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