For many decades, the most common argon recovery and purification process used several steps:
1) Taking a "side-draw" stream from the primary air separation distillation system at a point in the low-pressure column where the concentration of argon is highest.
2) Processing the feed in a crude argon column which returns the nitrogen to the low pressure column and produces a crude argon product.
3) Warming the crude argon and reacting the (typically about 2%) oxygen impurity in the stream with a controlled amount of hydrogen to form water.
4) Removing the water vapor by condensation and adsorption.
5) Re-cooling the gas to cryogenic temperature.
6) Removing the remaining non-argon components (small amounts of nitrogen and unconsumed hydrogen) through further distillation in a pure argon distillation column.
TYHJ is a specialty gases manufacturer in China, which can supply liquid Argon, common Argon, etc.
