发明授权
- 专利标题: Tungstic acid powder consisting of spherical tungsten particles and method for producing same
- 专利标题(中): 由球形钨颗粒组成的钨酸粉末及其制造方法
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申请号: US11579775申请日: 2005-04-28
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公开(公告)号: US08052956B2公开(公告)日: 2011-11-08
- 发明人: Sven Albrecht , Armin Olbrich , Michael Reiss , Frank Schrumpf , Juliane Meese-Marktscheffel , Uwe Kutzler
- 申请人: Sven Albrecht , Armin Olbrich , Michael Reiss , Frank Schrumpf , Juliane Meese-Marktscheffel , Uwe Kutzler
- 申请人地址: DE
- 专利权人: H. C. Starck GmbH
- 当前专利权人: H. C. Starck GmbH
- 当前专利权人地址: DE
- 代理机构: Connolly Bove Lodge & Hutz LLP
- 优先权: DE102004023068 20040511
- 国际申请: PCT/EP2005/004550 WO 20050428
- 国际公布: WO2005/110923 WO 20051124
- 主分类号: C01G39/00
- IPC分类号: C01G39/00 ; C01G41/00
摘要:
Process for the production of a powdered spherical tungstic acid by acidification of an aqueous alkaline tungstate solution with mineral acid at elevated temperature, preferably in a continuous stirred tank or a cascade of at least 2 continuous stirred tanks, and tungstic acid obtainable in this way, which is characterized by a high bulk density and spherical morphology.
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