Process for preparing halogenated metal chelates

Details Process for preparing halogenated metal chelates Process for preparing halogenated metal chelates

1978-03-06

1979-04-17

Sneed, Helen M. S.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260429J, 2604381, 2604385R, 260448B, C07F 1506, C07F 1502, C07F 1100

Patent

active

041500474

ABSTRACT:
This invention relates to an improved process for preparing halogenated metal chelates of beta-dicarbonyl compounds, particularly the tris-brominated acetylacetonates. The process comprises passing elemental halogen through a solution comprising the metal chelate, an inert solvent in which the metal chelate has a solubility of at least 0.5 grams per 100 grams solvent and the halogenated product has a solubility of less than 1 gram per 100 grams solvent and a halogenated Lewis acid at a temperature from about 0.degree.-60.degree. C. thereby forming a halogenated metal chelate precipitate and then recovering the precipitate.

REFERENCES:
patent: 3014939 (1961-12-01), Kluiber
patent: 3272853 (1966-09-01), Braun
patent: 3634477 (1972-01-01), Chattoraj et al.
Fernando, Adv. in Inorganic Chem. & Radio Chem., vol. 7, pp. 188-195 (1965).

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