发明授权
- 专利标题: IRON OXIDE CONTAINING PRECIPITATED CRYSTALLINE TITANIUM DIOXIDE AND PROCESS FOR THE MANUFACTURE THEREOF
- 专利标题(中): 氧化铁含有沉淀的晶TiO2和相关方法
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申请号: EP06819336.6申请日: 2006-11-08
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公开(公告)号: EP1945349B1公开(公告)日: 2011-01-12
- 发明人: MENINI, Claudia , SERGI, Marino
- 申请人: Rockwood Italia SpA
- 申请人地址: Via Reiss Romoli 44/12 10148 Torino IT
- 专利权人: Rockwood Italia SpA
- 当前专利权人: Rockwood Italia SpA
- 当前专利权人地址: Via Reiss Romoli 44/12 10148 Torino IT
- 代理机构: Maiwald Patentanwalts GmbH
- 国际公布: WO2008055542 20080515
- 主分类号: B01J21/06
- IPC分类号: B01J21/06 ; B01J23/745 ; B01J35/00 ; C01G49/00 ; C01G49/02 ; C04B35/00 ; C09C1/24
摘要:
The present invention is directed to a process for the manufacture of iron oxide particles coated with crystalline titanium dioxide, wherein the process comprises the steps of adding an aqueous solution of at least one titanyl salt to an iron oxide dispersion to form a reaction mixture, precipitating titanium dioxide on said iron oxide particles by adding an alkali, wherein the titanium dioxide is at least partially in a crystalline form, and isolating the resulting titanium dioxide-containing iron oxide particles from the reaction mixture. The invention is further related to iron oxide particles comprising precipitated crystalline titanium dioxide and the use of the resulting photocatalitycally active material.
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