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    • 7. 发明申请
    • RECOVERY OF PRECIOUS METAL
    • 恢复重金属
    • WO01011094A1
    • 2001-02-15
    • PCT/US2000/021605
    • 2000-08-08
    • B01J23/96C01B21/26C22B11/02C23C4/08B01J19/00C22B7/00
    • C22B11/026B01J23/96B01J2219/00245C01B21/267C22B11/021C23C4/08Y02P10/214Y02P20/584
    • A foraminate element for recovery of platinum and/or palladium and/or rhodium lost from a platinum and/or palladium and/or rhodium-containing catalyst comprising a substrate containing palladium or a palladium alloy thereon in a thickness of about 0.005 to about 0.03 cm. The palladium or palladium alloy may be coated, plated or clad onto the substrate or is preferably deposited on a surface of the substrate by a thermal spray process, thick film application or a sputter coating process. The substrate may be a solid structure possibly made from graphite, glass, silicon, a ceramic, a metal or a metal alloy and a composite of a metal and non-metal having a plurality of openings therein or a fiber or wire screen.If the substrate is a screen, it preferably has a mesh size of less than 1 to about 320 fibers or wires/cm and an area of at least about 900 cm . Preferably, the substrate comprises a base metal which is stable at temperatures as high as 1200 DEG C and may be a metal or alloy such as an aluminum-chromium-iron alloy, a stainless steel alloy, a nickel-chromium alloy, a nickel-chromium-iron alloy, a nickel-chromium-iron-aluminum alloy, a nickel-base superalloy, an iron-base superalloy or a cobalt-base high temperature alloy. The foraminate element is especially useful for recovering platinum and/or palladium and/or rhodium lost during the course of an ammonia oxidation process.
    • 一种用于回收铂和/或钯和/或铑催化剂损失的铂和/或钯和/或铑的有机元素,包括其上含有钯或钯合金的基底,其厚度为约0.005至约0.03cm 。 钯或钯合金可以被涂覆,镀覆或包覆到基底上,或者优选通过热喷涂法,厚膜施加或溅射法沉积在基底的表面上。 衬底可以是可能由石墨,玻璃,硅,陶瓷,金属或金属合金制成的固体结构,以及金属和非金属的复合材料,其中具有多个开口或纤维或丝网。 基材是筛网,其优选具有小于1至约320纤维或丝/厘米的面积和至少约900厘米2的面积。 优选地,基材包括在高达1200℃的温度下稳定的贱金属,并且可以是金属或合金,例如铝 - 铬 - 铁合金,不锈钢合金,镍 - 铬合金,镍 - 铬 - 铁合金,镍 - 铬 - 铁 - 铝合金,镍基超合金,铁基超级合金或钴基高温合金。 所述有机元素对于在氨氧化过程中回收损失的铂和/或钯和/或铑尤其有用。