| 摘要 |
<p>The present invention relates to a process for preparing magnetite (Fe 3 O 4 ) or derivatives thereof, comprising the steps: a) preparing an aqueous solution A of a Fe(III) salt, b) preparing an aqueous solution B of an iodide salt, c) mixing solutions A and B to obtain a first precipitate, d) separating the first precipitate to obtain a filtrate, e) hydrolyzing the filtrate obtained in step d) by adjusting the pH to about 8.5 - 9 or above, preferably 9, in order to obtain a second precipitate, and f) separating the second precipitate.</p> |
