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Stainless steel reaction kettle how to carry out gas replacement?

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In the experiment, we will encounter gas replacement with nitrogen or hydrogen, or hydrogenation reaction, all of which have to convert the air in the kettle into the required gas reaction. Usually there will be2 methods. One is throughStainless steel reaction kettleAfter vacuuming, the gas to be reacted is introduced into the laboratory.Stainless steel reaction kettleThe other is to first pass in the required gas, then close the intake valve, and then open the exhaust valve;Stainless steel reaction kettleThe gas inside is replaced.