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    • 1. 发明授权
    • Vinyl acetate catalyst comprising metallic palladium and gold and prepared utilizing sonication
    • 乙酸乙烯酯催化剂,包括金属钯和金,并使用超声处理制备
    • US06303537B1
    • 2001-10-16
    • US09441603
    • 1999-11-17
    • Tao WangJerry A. BroussardH. Robert Gerberich
    • Tao WangJerry A. BroussardH. Robert Gerberich
    • B01J2358
    • B01J37/343B01J23/44B01J23/52B01J23/58B01J37/0203B01J37/0205C07C67/055C07C69/01C07C69/15
    • A catalyst effective for the production of vinyl acetate by reaction of ethylene, oxygen and acetic acid, comprising a porous support on the porous surfaces of which is deposited catalytically effective amounts of metallic palladium and gold, and prepared by steps comprising impregnating the support with one or more aqueous solutions of water-soluble compounds of the metals, fixing the metals on the support as water-insoluble compounds in one or more fixing steps by reaction with an appropriate alkaline compound, and reducing the water-insoluble compounds of the catalytically active metals to their free metallic form in one or more reducing steps, at least one of the said reducing steps being carried out in an aqueous medium containing a reducing agent dissolved therein or through which a gaseous reducing agent is bubbled, and in which the support containing the fixed water-insoluble metal compounds is immersed, while sonicating, i.e., applying ultrasound waves to, such aqueous medium.
    • 通过乙烯,氧气和乙酸的反应生产乙酸乙烯酯有效的催化剂,包括多孔表面上的多孔载体沉积有催化有效量的金属钯和金,并通过以下步骤制备,包括用一种浸渍载体 或更多的水溶性金属化合物的水溶液,通过与适当的碱性化合物反应在一个或多个固定步骤中将金属固定在载体上作为水不溶性化合物,并还原催化活性金属的水不溶性化合物 在一个或多个还原步骤中以至少一种所述还原步骤在含有还原剂溶解在其中的还原剂的水性介质中进行,或通过该还原剂鼓泡气体还原剂,其中含有 固定的不溶于水的金属化合物被浸没,同时超声处理,即对这种水性介质施加超声波。