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    • 8. 发明授权
    • Fluid bed vinyl acetate catalyst
    • 流化床乙酸乙烯酯催化剂
    • US06358882B1
    • 2002-03-19
    • US09455753
    • 1999-11-15
    • George Frederick SalemMichael James Baker
    • George Frederick SalemMichael James Baker
    • B01J2300
    • B01J37/0205B01J23/58B01J23/63B01J35/002B01J35/006B01J35/023B01J35/1014B01J35/1038B01J35/1042B01J37/0045C07C67/055C07C69/01C07C69/15
    • A catalytically active material useful to prepare vinyl acetate monomer from ethylene, acetic acid, and an oxygen-containing gas under fluid bed conditions comprises a porous microspheroidal support containing catalytically active palladium crystallites finely dispersed within the support. This catalyst material does not require incorporation of gold to maintain activity and selectivity. A process to produce a vinyl acetate fluid bed catalyst in which catalytically active small palladium crystallites are finely dispersed within the support comprises dispersing selected metal species within the support which have an affinity to palladium to form very fine crystallites of palladium. The affinity metal species may be dispersed by impregnation onto a preformed microspheroidal support or may be intimately incorporated within the support before impregnation with a soluble palladium species.
    • 用于在流化床条件下从乙烯,乙酸和含氧气体制备乙酸乙烯酯单体的催化活性材料包括含有细分散在载体内的催化活性钯微晶的多孔微球载体。 该催化剂材料不需要掺入金以维持活性和选择性。 一种生产乙酸乙烯酯流化床催化剂的方法,其中催化活性的小钯微晶细分散在载体内,包括将选择的金属物质分散在载体中,其对钯具有亲合力,以形成非常细的钯微晶。 亲和金属物质可以通过浸渍分散到预形成的微球载体上,或者在用可溶性钯物质浸渍之前可以紧密地掺入载体内。