| 摘要 |
The present invention relates to an improvement in the method of preparing a magnesium hydroxide-calcium carbonate product which is useful, for example, as a paper pigment. A process for preparing such product involves slaking dolime to convert the calcium oxide and magnesium oxide to their respective hydroxides and then carbonating the calcium hydroxide portion to calcium carbonate. The present improvement comprises employing a slaking solution which contains a water soluble boron compound. The improved process results in a magnesium hydroxide-calcium carbonate product with enhanced optical properties.
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