| 摘要 |
1,237,452. Ammonia synthesis catalysts. GAS COUNCIL. 23 June, 1969 [24 June, 1968], No. 30054/68. Heading B1E. [Also in Division C1] Haber synthesis catalysts contain at least 80% Fe or an oxide thereof, at least 1% U oxide/usually UO 2 /and at least 1% of an oxide of Th or a precursor therefor. Additionally the catalyst may contain K and Al 2 O 3 . Preparation is conventional e.g. decomposition of metallic nitrates at 800‹C followed by reduction. |
