PRODUCTION OF VALVE METAL POWDERS Russian patent published in 2009 - IPC B22F9/20 C22B34/24 

FIELD: technological processes.

SUBSTANCE: invention is related to production of valve metal powders. Valve metal compounds are reduced by alkaline metal in the presence of thinner salt. Reduction is done in the presence of substance that helps to decrease granules, which is added to reaction mixture periodically or continuously. Valve metal compound used is K₂TaF₇, Na₂TaF₇ or their mixture. Substance used to assist in decrease of granules, sulfur-containing, phosphor-containing, boron-containing and/or silicon-containing compounds are used.

EFFECT: production of valve metal powders with high specific surface and uniform distribution of size.

10 ex, 11 cl