Preparation of vanadium III oxidic compounds, and dehydrogenatio

Details Preparation of vanadium III oxidic compounds, and dehydrogenatio Preparation of vanadium III oxidic compounds, and dehydrogenatio

1987-10-29

1989-03-28

Pal, Asok

Chemistry of inorganic compounds

Oxygen or compound thereof

Metal containing

2521881, 25218825, 423407, 423594, 423595, 423598, 423599, 423600, 502524, 502525, C01F 100

Patent

active

048162434

ABSTRACT:
Disclosed is making a particular inorganic crystalline vanadium III oxidic compound from a pentavalent vanadium compound and at least one other or more metal cations, which process comprises (1) reducing a pentavalent vanadium oxidic compound to the V.sup.III state by heating at 100.degree. C. or less an aqueous medium slurry or solution of said pentavalent compound containing a reducing agent selected from hydrazine and hydrocarbylhydrazine, (2) providing in said aqueous medium, either before, during or after said reducing step, said other metal cation(s) in solution in the ratio called for by said particular crystalline compound, (3) removing the liquid aqueous medium, and (4) calcining the resulting dry solid at a temperature in the range from 400.degree. to 800.degree. C. in an inert atmosphere.
Also disclosed is the vapor phase catalytic dehydrogenation of paraffins using certain spinels and perovskites as catalysts.

REFERENCES:
patent: 2702739 (1955-01-01), Kelly, Jr.
patent: 3410652 (1968-11-01), Hausen et al.
patent: 4035476 (1977-07-01), Kmaier et al.
patent: 4619822 (1986-10-01), Hammon et al.
patent: 4737355 (1988-04-01), Guttmann et al.

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