Compositions: coating or plastic – Materials or ingredients – Pigment – filler – or aggregate compositions – e.g. – stone,...
Patent
1987-08-24
1989-12-05
Lieberman, Paul
Compositions: coating or plastic
Materials or ingredients
Pigment, filler, or aggregate compositions, e.g., stone,...
106438, 106444, 106447, C04B 1430, C07C 136
Patent
active
048850349
ABSTRACT:
In a process for producing a composite TiO.sub.2 pigment which contains a white inert extender, the neutralization is simplified and the need for washing processes is eliminated in that a metatitanic acid suspension, which contains free and combined sulfuric acid and has been purified for the removal of chromophoric elements, is neutralized by an addition of calcium oxide and/or barium oxide in quantities which are stoichiometric with respect to total sulfate, the calcium sulfate and/or barium sulfate is precipitated in an intimate mixture with the metatitanic acid, and the coprecipitate is separated and dried. The precipitated calcium sulfate and/or barium sulfate is contained in the coprecipitate in an amount from 1 to 25% by weight.
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Chem. Abstract (Derwent) 79-10557B/06.
Encyclopedia of Chemical Technology-vol. 20 3/5/70.
Griebler Wolf-dieter
Kreth Wolfgang
Dubno Herbert
Lieberman Paul
Metallgesellschaft Aktiengesellschaft
Myers Jonathan
Skane Christine A.
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