| 摘要 |
<p>IMPROVED COPPER CHROMITE CATALYST An improved copper chromite catalyst having high density, low monovalent ion content, high activity and resistance to poisoning is prepared by reacting a soluble copper salt with chromic acid or a dichromate in solution in the presence of ammonia and urea to precipitate a copper-chromium-nitrogen complex, washing, drying and calcining the precipitate. -i-</p> |
