Method of producing inorganic pigments
OwnerZinaida Alexandrovna Savenkova, Dmitry Danilovich Logvinenko +8inventors
InventorsZinaida Alexandrovna Savenkova, Dmitry Danilovich Logvinenko, Karl Lazarevich Tsantker, Oleg Porfirievich Shelyakov, Alexandra Pavlovna Manzhely, Gennady Grigorievich Bobrov, Genrikh Samuilovich Ioffe, Boris Vasilievich Mironov, Pavel Iosifovich Kestelman, Galina Vasilievna Egorycheva
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Abstract
A method, wherein an electromagnetic field is established in which a precipitate of pigments is formed from aqueous solutions of the salts of metals in the presence of ferromagnetic solids, whereupon the precipitate is treated to obtain a finished form of pigment.
Claims2
A method of producing inorganic pigments comprising the steps of:
- (a) generating a rotating electromagnetic field inside a reaction vessel having an inlet and an outlet opening, said electromagnetic field having an induction of at least 0.1 T;
- (b) introducing magnetically soft non-equiaxial ferromagnetic particles into the reaction vessel within the zone of said electromagnetic field;
- (c) passing a continuous flow of a solution of a salt of a metal selected from the group consisting of lead, iron, copper and titanium through the zone of the rotating electromagnetic field, thus forming a pigment precipitate;
- (d) subjecting the precipitate to the rotating electromagnetic field to destroy the ion crystalline lattice of the pigment so that additional crystallization centers are formed;
- and (e) recovering the pigment product.
Dependencies are inferred from the claim text.