| 摘要 |
<p>1349100 Oxidation catalysts NATIONAL DISTILLERS & CHEMICAL CORP 17 Dec 1971 [17 Dec 1970 10 Nov 1971] 58792/71 Heading B1E [Also in Division C2] Catalysts containing palladium metal and phosphoric acid on a support are used for the preparation of acetic acid by the oxidation of ethylene with molecular oxygen in the vapour phase in the presence of water (see Division C2). Supports may be silica, alumina, titania, zirconia, activated carbon, 'Celite', silicaalumina, or boron phosphate and the palladium metal may be alone, admixed, alloyed or in solid solution with a Group I B or VIII metal. The palladium may be deposited from a salt a complex or oxide or hydroxide, and thereafter reduced to metal. After impregnation with phosphoric acid solution the catalyst may be calcined.</p> |
