Invention Grant
- Patent Title: Production of valve metal powders
- Patent Title (中): 生产阀门金属粉末
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Application No.: US11721276Application Date: 2004-12-09
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Publication No.: US08951328B2Publication Date: 2015-02-10
- Inventor: Josua Löffelholz , Frank Behrens , Siegfried Schmieder
- Applicant: Josua Löffelholz , Frank Behrens , Siegfried Schmieder
- Applicant Address: DE
- Assignee: H.C. Starck GmbH
- Current Assignee: H.C. Starck GmbH
- Current Assignee Address: DE
- Agency: Drinker Biddle & Reath LLP
- International Application: PCT/EP2004/013987 WO 20041209
- International Announcement: WO2006/061040 WO 20060615
- Main IPC: B22F1/00
- IPC: B22F1/00 ; B22F9/00 ; C21B15/04 ; C22B5/20 ; C22C1/04 ; B22F9/24 ; C22B5/00 ; C22B34/24 ; H01G9/052
Abstract:
The invention relates to the production of valve metal powders, in particular, tantalum powders by reduction of a corresponding valve metal compound, for example, K2TaF7, with an alkali metal in the presence of a diluent salt, whereby the reduction is carried out in the presence of a particle diminution agent, preferably, Na2SO4, which is added to the reaction mixture continuously or in aliquots.
Public/Granted literature
- US20080087138A1 Production Of Valve Metal Powders Public/Granted day:2008-04-17
Information query
