Preparation of anhydrous niobium and tantalum pentafluorides

Details Preparation of anhydrous niobium and tantalum pentafluorides Preparation of anhydrous niobium and tantalum pentafluorides

1990-08-15

1992-02-25

Niebling, John

Chemistry of inorganic compounds

Halogen or compound thereof

Binary fluorine containing compound

423492, C01G 3502

Patent

active

050911686

ABSTRACT:
A method of producing an anhydrous niobium or tantalum pentafluoride involving reacting the corresponding pentoxide or oxyhalide with an excess of anhydrous hydrogen fluoride in the presence of a sufficient dehydrating agent (e.g., COCl.sub.2, SOCl.sub.2 or SO.sub.2 Cl.sub.2) to react with any water formed. Such a process is useful to produce a catalyticallyactive anhydrous niobium or tantalum pentafluoride in essentially a single liquid phase reaction step.

REFERENCES:
patent: 4065405 (1977-12-01), Hulme
patent: 4069268 (1978-01-01), Siskin et al.
patent: 4098833 (1978-07-01), Wristers
patent: 4120912 (1978-10-01), Hulme
patent: 4124692 (1978-11-01), Kim et al.
patent: 4469804 (1984-09-01), Johnson
patent: 4678769 (1987-07-01), King
patent: 4752454 (1988-06-01), Pastor et al.

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