发明名称 |
METHOD FOR PRODUCING CALCIUM CARBONATE |
摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a method for efficiently obtaining calcium carbonate having good grindability and suitable as a coating pigment, in a method for producing calcium carbonate in a causticizing process of a pulp production process by a sulfate method or a soda method. <P>SOLUTION: The causticized light calcium carbonate having improved grindability can be obtained by using the mixture of quicklime produced in a causticizing process and quicklime supplied from the outside or only the quicklime supplied from the outside as a raw quicklime, and (i) blending the quicklime so that the blending ratio of the quicklime supplied from the outside is 50-100 wt.% of the total blending weight of the quicklime, and (ii) defining the average primary particle diameter of the quicklime supplied from the outside as≤3μm. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
申请公布号 |
JP2009203137(A) |
申请公布日期 |
2009.09.10 |
申请号 |
JP20080049378 |
申请日期 |
2008.02.29 |
申请人 |
NIPPON PAPER INDUSTRIES CO LTD |
发明人 |
ONO YUJI;OFUJI TOSHIMICHI;TAKAYAMA MASAHITO;YAMADA YOSHITAKE;KOJIMA TAKEHIRO |
分类号 |
C01F11/18;D21C11/00;D21H19/38 |
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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