| 摘要 |
<p>The invention relates to a process for the purification of titania by treating the titania with an aqueous solution comprising one or more ammonium compounds at elevated temperatures, separating the titania from the aqueous solution, drying the titania and, optionally, calcination of the dried titania. More especially the invention relates to the removal of sulphur (mainly present in the form of sulphate compounds) from the titania. The titania purified according to the above process is especially suitable for the use as catalyst carrier.</p> |
