H.c. Starck Gmbh

H. C. Starck, Gmbh & Co Kg

Karsten Beck

Hady Seyeda

Klaus Lerch

Udo Sulkowski

Bianca Agnes Balan

Axel Rosenkranz

Christoph Schnitter

Sven Albrecht

Ralph Otterstedt

Timo Langetepe

A process for producing a homogenous multi compound system which is hydroxide- and/or oxide-based includes a first alternative process comprising providing a first and a second refractory metal in respective hydrofluoric solutions, and mixing the first and second hydrofluoric solutions to provide a mixed hydrofluoric solution comprising a dissolved first and second refractory metal. A second alternative process comprises dissolving the first and the second refractory metal in an alternative mixed hydrofluoric solution. The mixed hydrofluoric solution or the alternative mixed hydrofluoric solution is precipitated with a precipitant to provide a solids mixture in a suspension. The first and second refractory metal is from the group consisting of Mo, W, Nb, Re, Zr, Hf, V, Sb, Si, Al, and Ta. The first and second refractory metal are different. At least one of the first and second refractory metal is provided as a fluoro and/or as an oxyfluoro complex.

Process for producing a pure-phase multisubstance system, a ceramic material based on the pure-phase multisubstance system, a shaped body, and a composite formed therefrom

A process for the production of a valve metal oxide powder, in particular an NbOor TaOpowder by continuous reaction of a fluoride-containing valve metal compound with a base in the presence of water and calcination of the resultant product, wherein the reaction is performed in just one reaction vessel and at a temperature of at least 45&#xb0; C. Valve metal oxide powders obtainable in said manner which exhibit a spherical morphology, a Dvalue of 10 to 80 &#x3bc;m and an elevated BET surface area.

Valve metal-oxide powder and method for producing said powder

A niobium compound, ammonium(bisaquo oxobisoxalato)niobate (NH)[Nb(O)(CO)(HO)] and hydrates thereof, is described along with formulations containing the same and methods for creating a product specification for a batch, lot, or shipment of such compounds, comprising specifying at least one property value for said batch, lot, or shipment.

Niobium compounds and hydrates thereof, formulations containing the same, and methods of providing specifications therefor

Valve metal oxide powders and process for the production thereof

The present invention relates to novel, water-soluble niobium compounds, a process for their preparation and their formulations.

Niobium compound

Growing community of inventors

Goslar, Germany

Karsten Beck