How is ammonia separated from the unreacted nitrogen and hydrogen in the Haber Process?

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In the Haber–Bosch process, the gases hydrogen H2 and nitrogen N2 are passed at high temperatures, in the range of 400-450 degrees Celsius, and at high pressures, close to 200 atmospheres, over a catalyst of iron prepared from a form of iron oxide called magnetite.

The reaction 2N + 3H2 --> 2NH3 takes...

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