Author Topic: O2 wacker - reusing IPA + catalyst  (Read 2134 times)

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ja304

  • Guest
O2 wacker - reusing IPA + catalyst
« on: May 17, 2003, 10:01:00 AM »
After extracting the organic material, is it practical/feasible to reuse the IPA containing the catalysts for a subsequent run (as opposed to recovering the metal catalyst by distilling off the IPA)?

Rhodium

  • Guest
Rather isolate the Pd and make new PdCl2
« Reply #1 on: May 17, 2003, 10:43:00 PM »
I find it unlikely that you could re-use the solution as is with good results, as the catalytic activity of the Pd falls continuously as it is used in the reaction, and is getting contaminated by by-product sludge.

synthesys

  • Guest
Swim had success reusing Pd
« Reply #2 on: May 18, 2003, 08:17:00 PM »
Swim filters out his Pd after basifying the solution in accordance with the DMF/O2 wacker write up, and has had success reusing the Pd up to 3 times.


tranceport

  • Guest
I find that hard to believe...
« Reply #3 on: May 20, 2003, 10:45:00 AM »
And no offense meant at you stranger, just even for a non chemist. Wouldnt reactivity go down with each use? And forgive the lack of confidence in what I am stating/asking, as I am still ripping through books. Seems to me yeilds should go down greatly with each use, and I dont believe home purification under non lab conditions could produce useable pdcl2 each go... Could anyone clarify?