| 摘要 |
<p>1,267,182. Heteropoly catalyst composition. CELANESE CORP. 28 Jan., 1970 [3 Feb., 1969], No. 4019/70. Heading B1E. [Also in Division C2] A catalyst composition has the formula Mo 12 V 0À5-12 W 0À1-6 Mn 0À5-20 O 37-94 . It is prepared by mixing aqueous solutions of water soluble compounds of the metals, followed by evaporating off the water and calcining. The catalyst may be supported or unsupported, supports specified being silica, alumina, silicaalumina, silicon carbide, titania, charcoal, clays, firebrick and bauxite. When a support is used it may form 25 to 99% wt. of the total catalyst composition. The catalyst is used in the presence of water vapour in the oxidation of unsaturated aldehydes.</p> |
