ORGLIST: Recovery of Catalysts

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From: kmorendha (mailbox$##$prolificint.com)
Date: Tue May 23 2006 - 13:17:29 EDT

Hi friends ! I done a reduction reaction of a ketoxime using Zinc-Nickel couple to its amine. I made this couple insitu by dissolving first NiSO4 in conc. ammonia solution & then adding zinc dust therein. According to the literature, nickel is reduced to a black precipitate while the zinc powder is oxidized to soluble zinc salts (!!), and at the same time the finely divided nickel powder (!) reduces the organic substrate upon contact. Here, I'm confused about the recovery of both of these catalysts..... I mean after the reaction, which salts I will get of Zinc & Nickel ?And how can I recover both of these materials ? I actually don't know that which type of salt the Zn makes in this step & how it actually forms the couple with Nickel........ Can you pls suggest me about proper recovery of both these catalysts ? Awaiting your suggetions...... Regards, Kamal Morendha
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