| 摘要 |
In a process for the low-temperature separation of air into dry product gases wherein at least a portion of the entering air is cooled by indirect heat exchange in a heat exchanger against at least one of the product gases and is freed of impurities by an adsorption process prior to this heat exchange, the improvement which comprises freeing the air of substantially only H2O in the adsorption process and periodically interchanging the flow paths for the air and for the product gas, respectively, in the heat-exchanger.
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