Process for the preparation of high-purity zirconium,...

Details Process for the preparation of high-purity zirconium,... Process for the preparation of high-purity zirconium,...

2007-09-25

2007-09-25

Nazario-Gonzalez, Porfirio (Department: 1621)

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

Organic compounds

Heavy metal containing

C556S054000, C106S287260

Reexamination Certificate

active

11509157

ABSTRACT:
A novel process for the preparation of high-purity zirconium, hafnium, tantalum and niobium alkoxides (alcoholates), novel tantalum and niobium compounds and a process for their preparation are provided. The process comprises the steps of mixing crude metal alkoxides M(OR)xhaving a halogen impurity of at least 0.05 wt. %, with an alcohol ROH, in which R is a C1-C12-alkyl radical, and subsequently or simultaneously metering in an excess of ammonia, based on the amount of mononuclear or polynuclear halogen-containing metal alkoxides.

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patent: 2002-161059 (2002-06-01), None

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