摘要:
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.
摘要:
The invention relates to a composition and to a method for the production thereof, comprising quaternary amino-functional organosilicon compounds, in particular in the form of oligomers and polymers, which can be present ranging from partially hydrolyzed form to completely hydrolyzed form, and which are in particular soluble in water, have a low VOC content, and to the use thereof.
摘要:
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.
摘要:
Surface-modified metal oxide particles coated with silicon dioxide and having a low structure are produced by adding a base dissolved in water, with stirring, to a dispersion consisting of a metal oxide, at least one compound of the type XnSi(OR)4−n and water, separating off, optionally washing with water, drying and surface-modifying the reaction product. The surface-modified metal oxide particles coated with silicon dioxide can be used in sunscreens and in CMP applications.
摘要:
A powder mixture consisting of zinc/titanium mixed oxide particles, titanium dioxide particles and zinc oxide particles, wherein the zinc/titanium mixed oxide particles have a composition according to the formula (ZnO)1-x(TiO2)x, where 0.01
摘要:
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) in which M is hydrogen, monovalent or divalent metal cation, ammonium ion, organic amine radical; a is 1, or where M is a divalent metal cation, is ½; X is likewise —OMa or —O—(CpH2pO)q—Rl where R1═H, aliphatic hydrocarbon radical having 1-20 carbon atoms, cycloaliphatic hydrocarbon radical having 5 to 8 carbon atoms, optionally substituted aryl radical having 6 to 14 carbon atoms, p=2 to 4, q=0 to 100, —NHR2 and/or —NR22 where R2═R1 or —CO—NH2; Y is O, NR2; A1 is ethylene radical, propylene radical, isopropylene radical, butylene radical; m is 10 to 30; n is 0 to 50; and k is 10 to 30, where the summ+k is in the range from 20 to 60, is co-used.
摘要翻译:包含微细金属氧化物颗粒和分散助剂的水分散体,其中作为分散助剂,其中M为氢的通式(I)的化合物中的至少一种,一价或二价金属阳离子,铵离子,有机胺基; a为1,或其中M为二价金属阳离子为½; X同样为-OMA a或-O-(C 1 H 2 H O)q -R 2 其中R 1 -H,具有1-20个碳原子的脂族烃基,具有5至8个碳原子的脂环族烃基,任选取代的具有6至14个碳原子的芳基, p = 2至4,q = 0至100,-NHR 2和/或-NR 2 2其中R 2, 或-O-NH 2; Y是O,NR <2; A 1是乙烯基,丙烯基,异丙烯基,亚丁基; m为10〜30; n为0〜50; 并且k为10〜30,其中summ + k在20〜60的范围内,是共同使用的。
摘要:
Ternary, pyrogenically prepared, crystalline metal mixed oxide powder having the components titanium and silicon and a third component chosen from the group comprising aluminium, zirconium, zinc, tin, magnesium, yttrium, vanadium, tungsten, tantalum, cerium or boron. It is prepared by a procedure in which a vaporizable or atomizable silicon and titanium compound and a vaporizable or atomizable compound of a third mixed oxide component are mixed with hydrogen and primary air and the gas mixture is burned into a reaction chamber, and the powder formed is separated off from the gaseous reaction products. It can be employed in sunscreen formulations.
摘要:
A powder mixture consisting of zinc/titanium mixed oxide particles, titanium dioxide particles and zinc oxide particles, in which the zinc/titanium mixed oxide particles have a composition according to the formula (ZnO)1-x(TiO2)x, where 0.01
摘要:
Brushable cosmetic preparation having a creamy or paste-like consistency, containing 50 to 95 wt. % of water, hydrophobed silicon dioxide powder, at least one cosmetically relevant active ingredient or auxiliary substance that is water-soluble or is dispersible or emulsifiable in an aqueous medium, and a viscosity regulator. It is produced by adding at least one cosmetically relevant active ingredient and/or auxiliary substance and optionally at least one pigment in water to a solution or dispersion adding hydrophobed silicon powder in portions or continuously whilst mixing and continuing mixing until the mixture, which is originally in powder form after addition of hydrophobed silicon dioxide powder, takes on a pasty consistency, and then adding a viscosity regulator and optionally at least one oil body, optionally before, together with or after addition of the viscosity regulator, with mixing. It can be used in pastes, creams, gels, pencils, foams, emulsions, dispersions, roll-ons, lotions.
摘要:
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.