Abstract: A process for producing a particulate TiO2 includes supplementing metatitanic acid with an alkali compound in a quantity of 1200 ppm to 2400 ppm of alkali, with a phosphorus compound in a quantity of 0.1 wt.-% to 0.3 wt.-% by weight of P, expressed as phosphorus, and with an aluminum compound in a quantity of 1 ppm to 1000 ppm of Al, expressed as Al, to obtain a mixture. The quantity of the alkali compound, of the phosphorus compound, and of the aluminum compound are with respect to the TiO2 content. The mixture is calcined at a constant temperature of 940° C. to 1020° C. until a numerical fraction X50 of TiO2 has a primary crystallite size of at least 200 nm, to obtain a calcined mixture. The calcined mixture is cooled to obtain a cooled calcined mixture. The cooled calcined mixture is grinded to obtain the particulate TiO2.

Abstract: A particulate TiO2 includes a TiO2 content of at least 99 wt.-%, an anatase content of at least 98 wt.-%, a primary crystallite size X50 of at least 200 nm, a numerical fraction of TiO2 with a primary crystallite size of at most 100 nm of at most 10%, a specific surface area of at most 8 m2/g as determined by BET measurements, 1200 ppm to 2400 ppm of alkali with respect to the TiO2 content, an Al content of 1 ppm to 1000 ppm, expressed as Al and with respect to the TiO2 content, a weight ratio of Al2O3 to Nb2O5 of from 0.17 to 0.74, and 0.1 wt.-% to 0.3 wt.-% of P, expressed as phosphorus and with respect to the TiO2 content.

Abstract: A process for producing a particulate TiO2 includes supplementing metatitanic acid with an alkali compound in a quantity of 1200 ppm to 2400 ppm of alkali, with a phosphorus compound in a quantity of 0.1 wt.-% to 0.3 wt.-% by weight of P, expressed as phosphorus, and with an aluminum compound in a quantity of 1 ppm to 1000 ppm of Al, expressed as Al, to obtain a mixture. The quantity of the alkali compound, of the phosphorus compound, and of the aluminum compound are with respect to the TiO2 content. The mixture is calcined at a constant temperature of 940° C. to 1020° C. until a numerical fraction X50 of TiO2 has a primary crystallite size of at least 200 nm, to obtain a calcined mixture. The calcined mixture is cooled to obtain a cooled calcined mixture. The cooled calcined mixture is grinded to obtain the particulate TiO2.

Abstract: A particulate TiO2 includes a TiO2 content of at least 99 wt.-%, an anatase content of at least 98 wt.-%, a primary crystallite size X50 of at least 200 nm, a numerical fraction of TiO2 with a primary crystallite size of at most 100 nm of at most 10%, a specific surface area of at most 8 m2/g as determined by BET measurements, 1200 ppm to 2400 ppm of alkali with respect to the TiO2 content, an Al content of 1 ppm to 1000 ppm, expressed as Al and with respect to the TiO2 content, a weight ratio of Al2O3 to Nb2O5 of from 0.17 to 0.74, and 0.1 wt.-% to 0.3 wt.-% of P, expressed as phosphorus and with respect to the TiO2 content.

Abstract: The electrically conductive, barium sulfate-containing composition consists of BaSO.sub.4 particles having a surface area of from 0.1 to 150 m.sup.2 /g. The BaSO.sub.4 particles each are provided with a SnO.sub.2 coating having a thickness of 2 to 80 nm and containing from 1 to 15% by weight of the Sb.sub.2 O.sub.3. The electrically conductive, barium sulfate-containing composition is made by a method including the steps of adding a first acidic solution containing 1 to 95% by weight SnCl.sub.4 and a basic solution to an aqueous dispersion from 50 to 800 g/l of BaSO.sub.4 to make a basic mixture having a pH from 9 to 15; then adding an acid to the basic mixture to form an acidic mixture having a pH from 4 to 1; then adding a second acid solution containing 0.5 to 60% by weight of SbCl.sub.

Abstract: An electrically conductive powder is provided which comprises particles of zinc sulfide coated with an elecctrically conductive coating of copper sulfide wherein the zinc sulfide particles have a BET surface area of 2 to 10 m.sup.2 /g and a purity of at least 97%, and is particularly useful to impart antistatic properties to plastics, synthetic fibers, laminated papers and the like.