发明名称 |
Calcium carbonate beneficiation |
摘要 |
A process for purifying calcium carbonate ore by the removal of silicate impurities from the ore by reverse flotation. The process achieves high yields and low acid insoluble content of the calcium carbonate product by employing novel collectors. These novel collectors which characterize the invention comprise organo-nitrogen compounds including propoxylated quaternary ammonium compounds, unsymmetrical dialkyl dimethyl quaternary ammonium compounds and dialkyl hexahydropyrimidine compounds.
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申请公布号 |
US4892649(A) |
申请公布日期 |
1990.01.09 |
申请号 |
US19880206247 |
申请日期 |
1988.06.13 |
申请人 |
AKZO AMERICA INC. |
发明人 |
MEHAFFEY, JOSEPH L.;NEWMAN, THOMAS C. |
分类号 |
B03D1/01 |
主分类号 |
B03D1/01 |
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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