Compositions: coating or plastic – Materials or ingredients – Pigment – filler – or aggregate compositions – e.g. – stone,...
Patent
1992-02-27
1993-02-16
Bell, Mark L.
Compositions: coating or plastic
Materials or ingredients
Pigment, filler, or aggregate compositions, e.g., stone,...
106419, 106425, 106427, 106461, 106462, C01G 2900, C01G 3102
Patent
active
051867486
ABSTRACT:
An improved process for the preparation of bismuth vanadate pigments and solid solutions based on bismuth vanadate by a) mixing a solution of a bismuth (III) salt containing, if required, one or more further metal salts or a mixture thereof with the aqueous solution of a vanadate salt containing, if required, a molybdate, tungstate or sulfate salt or a mixture thereof and b) subjecting the suspension thus obtained to a subsequent aftertreatment to convert the particles first precipitated in amorphous form into crystalline compounds, wherein during the mixing and/or during the subsequent aftertreatment step fluoride ions are used.
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Corvers Werner F. C. G.
Erkens Leonardus J. H.
Geurts Herman J. J. M
Schmitt Gregor
Bell Mark L.
Ciba-Geigy Corporation
Hertzog Scott L.
Villamizar JoAnn
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