| 摘要 |
<p>A simple and excellent method of regenerating a heteropolyacid-based catalyst which comprises dissolving and/or dispersing a heteropolyacid-based catalyst such as a phosphoromolybdic acid-based catalyst with a deteriorated catalyst activity in an aqueous medium and treating the solution or dispersion with an inorganic ion-exchanger such as a crystalline antimonic acid.</p> |
