| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a method for producing argon, with which high-purity argon is obtained by suppressing occurrence of methane. <P>SOLUTION: In the method for producing argon, raw material air is separated into gaseous nitrogen and oxygen by distillation, an intermediate component in which argon is concentrated is extracted and rectified, and crude gaseous argon including small amounts of oxygen and nitrogen is obtained, and subsequently the high-purity argon is produced by purifying the obtained crude argon. The method includes a deoxidation step to add hydrogen to the crude gaseous argon and to remove oxygen in the gaseous argon with a catalytic reaction, and in the deoxidation step, a change of carbon monoxide in the crude gaseous argon into methane is suppressed by using a catalyst with low activity. <P>COPYRIGHT: (C)2013,JPO&INPIT |
