Process for purifying niobium alkoxides and tantalum alkoxides

Details Process for purifying niobium alkoxides and tantalum alkoxides Process for purifying niobium alkoxides and tantalum alkoxides

1997-09-17

1999-07-06

Nazario-Gonzalez, Porfirio

Organic compounds -- part of the class 532-570 series

Organic compounds

Heavy metal containing

C07F 900

Patent

active

059199636

ABSTRACT:
A process, excellent in the mass productivity and economization, for purifying a niobium alkoxide or tantalum alkoxide containing Fe, Ca, Sr, Na, U, etc. as impurities to attain a purity necessitated for electronic materials or the like is provided. A niobium alkoxide or tantalum alkoxide containing the above-described impurities is dissolved in a solvent to obtain a solution, 1 to 20% of the alkoxide in the solution is hydrolyzed under stirring to form a solid reaction product, and the reaction product is separated from the unreacted alkoxide by the distillation to recover the alkoxide.

REFERENCES:
patent: 4525468 (1985-06-01), Mack et al.
patent: 4830879 (1989-05-01), Debsikdar
patent: 5508063 (1996-04-01), Suzuki et al.
patent: 5616410 (1997-04-01), Umezaki et al.
patent: 5679815 (1997-10-01), Kirlin et al.

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