发明名称 |
Process for obtaining precipitated calcium carbonate |
摘要 |
<p>The present invention provides a process for preparing a precipitated calcium carbonate product. The process comprises the steps of preparing an aqueous suspension of precipitated calcium carbonate seeds by carbonating a suspension of Ca(OH) 2 in the presence of 0.005 to 0.030 moles of Sr, in the form of Sr(OH) 2 , based upon moles of Ca(OH) 2 prior to or during carbonation; forming an aqueous suspension of a precipitated calcium carbonate product by carbonating a slurry of Ca(OH) 2 in the presence of 0.5 to 5 % by dry weight of the precipitated calcium carbonate seeds, wherein the precipitated calcium carbonate seeds have a D50 that is less than the D50 of the precipitated calcium carbonate product and the precipitated calcium carbonate seeds have an aragonitic polymorph content greater than or equal to the precipitated calcium carbonate product.</p> |
申请公布号 |
EP2371766(B1) |
申请公布日期 |
2013.03.06 |
申请号 |
EP20100003665 |
申请日期 |
2010.04.01 |
申请人 |
OMYA DEVELOPMENT AG |
发明人 |
POHL, MICHAEL;RAINER, CHRISTIAN;PRIMOSCH, GERNOT |
分类号 |
C01F11/18 |
主分类号 |
C01F11/18 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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