| 摘要 |
<p>The invention relates to a separation device which does not produce ultra-pure products. At least one distillation column which has a diameter of at least 4 m and/or is configured for operation at a pressure above 4.5 bar, consists of non-oxidizing steel or steel containing 9 to 10 % by weight nickel. The separation device can be an air separation device.</p> |
