基本信息:
- 专利标题： Process for preparing zirconium oxides and zirconium-based mixed oxides
- 申请号：US10554949 申请日：2004-04-29
- 公开(公告)号：US20060120951A1 公开(公告)日：2006-06-08
- 发明人： Yasuhide Takao , Colin Norman , Gavin Edwards , Ian Chisem , Clare Jones
- 申请人： Yasuhide Takao , Colin Norman , Gavin Edwards , Ian Chisem , Clare Jones
- 申请人地址： GB Manchester M5 2SP
- 专利权人： Magnesium Elektron Ltd.
- 当前专利权人： Magnesium Elektron Ltd.
- 当前专利权人地址： GB Manchester M5 2SP
- 优先权： GB0309902.5 20030430
- 国际申请： PCT/GB04/01840 WO 20040429
- 主分类号： C01G25/02
- IPC分类号： C01G25/02
摘要：
This invention relates to a process for preparing zirconium oxide, in its various forms, including zirconium-based mixed oxides. There is described a process for preparing a zirconium oxide in the absence of a cerium salt which comprises precipitating a zirconium hydroxide from an aqueous solution of a zirconium salt by reaction with an alkali in the presence of a controlled amount of sulphate anions at a temperature not greater than 50° C. and then calcining the hydroxide to form an oxide, wherein the oxide thus formed is essentially sulphate free. Catalysts and ceramics can be produced from the product oxides having improved thermal stability and improved sinterability, respectively. A particular use of the product oxide is as a promoter or catalyst support in automobile exhaust systems.