Process and plant for separating air and producing ultra-pure oxygen

摘要

Oxygen from the bottom of a low pressure column (4) is purified from hydrocarbons in a first auxiliary column (12), and the vapor at the top of this column is distilled in a second auxiliary column (17) heated at the base thereof with air at medium pressure. Ultra-pure oxygen is produced at the bottom of the second auxiliary column. Application in the production of ultra-pure oxygen for the electronic industry.