发明申请
- 专利标题: GRANULES OF METALS AND METAL OXIDES
- 专利标题(中): 金属和金属氧化物颗粒
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申请号: US12515751申请日: 2007-11-08
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公开(公告)号: US20100048376A1公开(公告)日: 2010-02-25
- 发明人: Monika Oswald , Klaus Deller , Tassilo Moritz , Manfred Nebelung
- 申请人: Monika Oswald , Klaus Deller , Tassilo Moritz , Manfred Nebelung
- 申请人地址: DE Essen DE Muenchen
- 专利权人: EVONIK DEGUSSA GmbH,FRAUNHOFER-GESELL. ZUR FOERD. DER ANG. FORS. E.V.
- 当前专利权人: EVONIK DEGUSSA GmbH,FRAUNHOFER-GESELL. ZUR FOERD. DER ANG. FORS. E.V.
- 当前专利权人地址: DE Essen DE Muenchen
- 优先权: DE102006055975.4 20061124
- 国际申请: PCT/EP07/62069 WO 20071108
- 主分类号: C04B35/482
- IPC分类号: C04B35/482 ; C04B35/10 ; C04B35/04 ; C04B35/14
摘要:
Process for preparing granules of oxidic or nonoxidic metal compounds, characterized in that a dispersion which comprises water, oxidic or nonoxidic metal compounds and at least one dispersant is spray-dried,—where the proportion of oxidic or nonoxidic metal compounds is 40 to 70% by weight and the sum of the proportions of water and the particles is at least 70% by weight and—the particles have a BET surface area of 20 to 150 m2/g and a median of the particle size of less than 100 nm,—where the dispersant is present in the dispersion with a proportion of 0.25 to 10% by weight based on the oxidic or nonoxidic metal compounds and—where the spray-drying is performed by atomization with air in the cocurrent principle or fountain principle, and an air inlet temperature of 170 to 300° C. and an air outlet temperature of 90 to 130° C. are selected.