发明名称 |
MAKING CO-PRECIPITATED MIXED OXIDE-TREATED TITANIUM DIOXIDE PIGMENTS |
摘要 |
<p>Simplified and improved processes are provided for manufacturing titanium dioxide pigments including a surface treatment whereby a plurality of inorganic oxides or a combination of one or more inorganic oxides with one or more inorganic phosphates are applied to a titanium dioxide base pigment. Aqueous acid-soluble sources of the desired inorganic oxides and/or phosphates are predissolved in an aqueous acid, and these can be added on a batch wise or more preferably on a continuous basis to an alkaline slurry containing the titanium dioxide base pigment and to which aqueous alkaline-soluble sources of the desired inorganic oxides are being or have been added previously. Co-precipitation of the oxides and/or oxides and phosphates is then accomplished by an adjustment of the pH, to provide a surface treated pigment with excellent homogeneity of the deposited mixed oxides and/or oxides and phosphates.</p> |
申请公布号 |
EP2142605(B1) |
申请公布日期 |
2011.07.20 |
申请号 |
EP20080743324 |
申请日期 |
2008.04.25 |
申请人 |
TRONOX LLC |
发明人 |
CRAIG, DANIEL, H.;GOPARAJU, VENKATA RAMA, RAO |
分类号 |
C09C1/36 |
主分类号 |
C09C1/36 |
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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