| 摘要 |
<p>Microencapsulated compounds of platinum or other platinum group metal are obtained by forming an encapsulating layer of a thermoplastic organic polymer around a finely divided platinum compound dispersed in a liquid that is a non-solvent for both the compound and the polymer. The microcapsules are isolated from the resulting liquid dispersion as a free-flowing powder by atomizing the dispersion and entraining the resultant droplets in a high velocity stream of a heated gas wherein the aqueous liquid is rapidly evaporated, thereby allowing the microcapsules to be isolated as a free flowing homogeneous powder.</p> |
