Chemistry of inorganic compounds – Oxygen or compound thereof – Metal containing
Patent
1991-04-24
1995-08-22
Bos, Steven
Chemistry of inorganic compounds
Oxygen or compound thereof
Metal containing
106479, C01G 100, C01G 2900, C01G 3100, C01G 3900
Patent
active
054438101
ABSTRACT:
This invention relates to a process for making a bismuth-vanadium-molybdenum-containing composition comprising: (A) preparing three separate aqueous compositions comprising: a first aqueous composition having a pH in the range of about 0.5 to about 4; a second aqueous composition comprising bismuth and having a pH in the range of about 0.2 to about 3; and a third aqueous composition comprising at least one salt of vanadium and at least one salt of molybdenum and having a pH in the range of about 9 to about 14; (B) adding said second aqueous composition and said third aqueous composition simultaneously to said first aqueous composition to form a fourth aqueous composition, and maintaining said fourth aqueous composition at a temperature in the range of about 30.degree.C. to about 90.degree.C. for up to about 4 hours, said fourth aqueous composition comprising precipitated solids; (C) separating said solids from said fourth aqueous composition; and (D) heating said solids at a temperature in the range of about 250.degree.C. to about 675.degree.C. for about 0.5 to about 30 hours to provide said bismuth-vanadtum-molybdenum-containing composition. This invention also relates to bismuth-vanadium-molybdenum-containing compositions made by the foregoing process, and to colored compositions containing such bismuth-vanadium-molybdenum-containing compositions.
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Blonski Robert P.
Byrne Christine J.
Welch John J.
Bos Steven
Ferro Corporation
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