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Ethylene oxide: spot the conditions flaw

Single question

One-step direct epoxidation of ethylene over a silver catalyst. Reactor temperature, catalyst metal, and support are all the textbook industrial choices. Check the oxidant.

Silver-catalyzed direct epoxidation of ethylene
Choosing the correct oxidant for heterogeneous catalysis
Why H2O2 over-oxidizes on Ag and O2 is the right choice

Find the flaw

Click the step that contains the flaw, or pick “No flaw” if you think every step is correct.

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