发明名称 |
Process for preparing calcium carbonate which contains low concentrations of non-calcium metals |
摘要 |
The present invention concerns a process for preparing calcium carbonate where a calcium compound in an aqueous media is carbonated in the presence of a chelating agent, with the reaction run under controlled pH. The resulting calcium carbonate product contains less non-calcium metal concentration than the starting calcium compound. |
申请公布号 |
AU5593298(A) |
申请公布日期 |
1998.06.29 |
申请号 |
AU19980055932 |
申请日期 |
1997.12.04 |
申请人 |
THE DOW CHEMICAL COMPANY |
发明人 |
R KEITH FRANK;JAIME SIM¤N;TED J. HANSON;JOHN E. PAVLICK |
分类号 |
A23L1/304;A23L2/54;C01F11/18;C09C1/02;C09D7/12;C13B20/02 |
主分类号 |
A23L1/304 |
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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