Abstract: The invention relates to a process for manufacturing zeolite catalysts containing subgroup metals by hydrothermal synthesis with subsequent calcination, which is characterized in that the subgroup metals are used in hydrothermal synthesis in the form of carbonyl, isonitrile or cyanocomplexes.

Abstract: Microporous and mesoporous metal silicates are prepared by the hydrothermal reaction of a silicon and metal source in the presence of a template. The choice of raw materials influences the purity and hence the catalytic activity of the products. A pyrogenic mixed oxide is used as the silicon and metal source. Prepared products have the composition (SiO2)1-x(AmOn)x, where A is Ti, Al, B, V or Zr and x is 0.005 to 0.1. Shaped objects of the microporous and mesoporous metal silicates are obtained directly by using a shaped object of the pyrogenic mixed oxide. The products obtained are used as oxidation catalysts.

Abstract: The use of granular materials based on pyrogenically produced silicon dioxide in pharmaceutical compositions, the pharmaceutical compositions per se, as well as an adsorbate consisting of the granular material and at least one further substance selected from pharmaceutical active constituents and auxiliary substances, and the production of such adsorbates, are described.

Abstract: Aqueous dispersions comprising:

Abstract: Aqueous dispersions comprising microfine metal oxide particles and dispersion auxiliaries, wherein, as dispersion auxiliaries, at least one of the compounds of the general formula (I) 1

Abstract: The present invention relates to a process for the production of a titanium silicalite shaped article by:a) preparation of a synthesis gel containing a Si2 source, a Ti2 source, a template compound and water,b) crystallisation of the synthesis gel under hydrothermal conditions,c) drying of the titanium silicalite from step b) at a temperature below the decomposition temperature of the template compound,d) preparation of a formable mass containing the product from step c), a binder and a paste-forming agent,e) forming of the mass from step d) into a green shaped article,f) optionally drying, andg) calcination of the green shaped article, as well asa titanium silicalite shaped article obtainable according to this process, and the use of this shaped article as a catalyst in epoxidation or ammoximation reactions.

Abstract: Silicon-titanium mixed oxide powder prepared by flame hydrolysis, having a ratio by weight of silicon dioxide/titanium dioxide, which is greater on the surface of the primary particles than that within the total primary particle. It is prepared by a flame hydrolysis process, in that a stream consisting of a vaporous titanium dioxide precursor and oxygen or an oxygen-containing gas and hydrogen, and a second stream consisting of a vaporous silicon dioxide precursor and a carrier gas consisting of oxygen, an oxygen-containing gas and/or an inert gas, are guided separately into the reaction chamber of a burner such as is known for the preparation of pyrogenic oxides, and are burnt here, the solid mixed oxide powder and hot gases are subsequently cooled, and the gases are separated from the solid. The powder may be used, for example, for the preparation of sunscreen preparations.

Abstract: Iron oxide-silicon dioxide-titanium dioxide mixed oxide is produced by burning vapourable compounds of iron, silicon and titanium together in a hydrogen/oxygen flame.

Abstract: The use of granulates based on pyrogenically-produced silicon dioxide in cosmetic compositions, the cosmetic compositions themselves, and an adsorbate of the granulate and at least one other substance, selected from cosmetic active ingredients and auxiliary substances, and the production of such adsorbates, are disclosed.

Abstract: Metal oxide particles having a metal oxide core and a silicon dioxide coating have a low structure. The particle are produced by a base dissolved in water being added under agitation to a dispersion comprising a metal oxide, at least one compound of the type XnSi(OR)4−n, and water, the reaction product being separated out, optionally washed with water and dried. The metal oxide particles coated with silicon dioxide may be used in sun screening agents and in chemical-mechanical-polishing (CMP) applications.

Abstract: Oximes are prepared by reacting carbonyl compounds, hydrogen peroxide and ammonia in the presence of a catalyst system comprising a catalyst comprising titanium, silicon and oxygen and a cocatalyst comprising an acidic solid comprising an organic or inorganic support material, where either the support material itself has Lewis-acid or Brönsted acid properties, or Lewis-acid or Brönsted-acid functional groups are applied to the support material.

Abstract: The present invention relates to a process for the production of a titanium silicalite shaped body by: (a) forming a formable composition containing titanium silicalite, a binder and a pasting agent, so that the Curd curve of the formable composition has a plateau value in the range from 20 to 90 mm; (b) shaping the composition of step (a) to form a green body; (c) optionally drying and (d) calcining the green body, to a titanium silicalite shaped body obtainable by that process, and to the use of such titanium silicalite shaped bodies in the epoxidation of olefins or the ammoximation of ketones.

Abstract: Iron oxide-silicon dioxide-titanium dioxide mixed oxide is produced by burning vapourable compounds of iron, silicon and titanium together in a hydrogen/oxygen flame. The mixed oxides may be used as UV absorbers in cosmetics.

Abstract: The present invention concerns a method for the production of a titanium-containing zeolite by: (a) combining a hydrolyzable silicon compound and a hydrolyzable titanium compound; (b) adding a basic quaternary ammonium compound in an aqueous medium to the mixture from (a) and hydrolysing the reaction mixture at a temperature in the range from 0° C. to 100° C. to form a synthesis sol; then (c) heating the synthesis sol to a temperature in the range from 150° C. to 190° C.; and (d) crystallizing the synthesis sol at this temperature, characterized in that the heating-up time in step (c) is less than 240 min.

Abstract: Pharmaceutical and cosmetic preparations containing pyrogenic silicon dioxide with a tamped density of 80-250 g/l. Preparations and compositions as solid, semisolid and liquid forms. Products, such as cosmetics, and methods of treatment using such compositions.

Abstract: Iron oxide-silicon dioxide-titanium dioxide mixed oxide is produced by burning vapourable compounds of iron, silicon and titanium together in a hydrogen/oxygen flame. They are used as UV absorbers in cosmetics.

Abstract: Oximes are prepared by reacting carbonyl compounds, hydrogen peroxide and ammonia in the presence of a catalyst system comprising a catalyst comprising titanium, silicon and oxygen and a cocatalyst comprising an acidic solid comprising an organic or inorganic support material, where either the support material itself has Lewis-acid or Brönsted acid properties, or Lewis-acid or Brönsted-acid functional groups are applied to the support material.

Abstract: Microporous and mesoporous metal silicates are prepared by the hydrothermal reaction of a silicon and metal source in the presence of a template. The choice of raw materials influences the purity and hence the catalytic activity of the products. A pyrogenic mixed oxide is used as the silicon and metal source. Prepared products have the composition (SiO2)1-x(AmOn)x, where A is Ti, Al, B, V or Zr and x is 0.005 to 0.1. Shaped objects of the microporous and mesoporous metal silicates are obtained directly by using a shaped object of the pyrogenic mixed oxide. The products obtained are used as oxidation catalysts.

Abstract: Waste waters are treated with hydroxyl producers in the presence of titanium-containing silicates as catalyst.

Abstract: A method for epoxidation of olefins with 2 to 6 C atoms, especially propene, with hydrogen peroxide in the gas phase at a temperature below 250° C. The reaction is carried out by bringing a gas mixture containing the olefin, hydrogen peroxide and water into contact with the catalyst from the series of compounds of an element of the 4th to the 6th subgroup of the periodic table or of arsenic or selenium and molecular sieves in the absence of a liquid phase. Titanium-containing molecular sleeves are preferred catalysts.