发明公开
EP0230214A2 Process for the preparation of substantially crystalline calcium sodium metaphosphate
失效
Verfahren zur Herstellung von im wesentlichen kristallinem Kalziumnatriummetaphosphat。
- 专利标题： Process for the preparation of substantially crystalline calcium sodium metaphosphate
- 专利标题（中）： Verfahren zur Herstellung von im wesentlichen kristallinem Kalziumnatriummetaphosphat。
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申请号： EP86870190.5申请日： 1986-12-19
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公开(公告)号： EP0230214A2公开(公告)日： 1987-07-29
- 发明人: Nathan, Vaida R. , Downes, James Earl , Seder, Alan Wade
- 申请人： Monsanto Company
- 申请人地址： 800 North Lindbergh Boulevard St. Louis Missouri 63167-7020 US
- 专利权人： Monsanto Company
- 当前专利权人： Monsanto Company
- 当前专利权人地址： 800 North Lindbergh Boulevard St. Louis Missouri 63167-7020 US
- 代理机构： Ernst, Hubert
- 优先权： US812043 19851223; US924672 19861105
- 主分类号： C01B25/45
- IPC分类号： C01B25/45 ; C01B25/44
摘要：
Substantially crystalline calcium sodium metaphosphate having a degree of crystallinity from about 60% to about 75% as determined from density and differential thermal analysis measurements is prepared by (a) forming a dry mixture of source materials for CaO, Na₂O, and P₂O₅ in proportions sufficient to provide a CaO/Na₂O/P₂O₅ mol percent ratio on a dry basis of about 29.0-34.0/16.0-18.0/50.0-53.0 and (b) heating the mixture at a temperature and for a time sufficient devolatilize the mixture and calcine the resulting mixture to form the substantially crystalline calcium sodium metaphosphate.
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