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<p>[QUOTE=&quot;swagge1, post: 997228, member: 22402&quot;]I am not sure as to how the 10% silver gets &quot;lost&quot;. Our process uses pure oxygen and ethylene as feed to the catalyst to convert it into EO.&nbsp; You would have to assume that some of the catalyst is oxidized by the oxygen and lost that way. The catalyst is very dusty and the dust gets on everything.&nbsp; Most of the dust is reclaimed, but some of it gets lost to the atmosphere as well as getting all over clothing, tools, and respirator cartridges.&nbsp; Some silver is probably lost by dust being blown off of the catalyst while the reactors are in service and ending up in finished product or waste streams in the ppm range.&nbsp; I think that the old ceramic carrier is crushed and sent to landfills.&nbsp; It is probably not cost effective to reclaim that last 10% of silver if in fact it is even there to be reclaimed.&nbsp; I have seen catalyst carrier used as gravel in parking lots before.&nbsp; I hope this answers some of your questions.[/QUOTE]</p><p><br /></p>

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