Process for the mixed production of high and low purity oxygen
AssigneeLiquid Air Engineering Corporation
InventorsBao Ha, Catherine Garnier
Life of this patent
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Abstract
A process for simultaneously providing both high and low purity oxygen from a double column, double reboiler apparatus, the double columns being high and low pressure columns, the low pressure column having a lower and upper reboiler with an intermediate outlet in between, which process entails extracting a low purity oxygen stream at the intermediate outlet and a high purity liquid oxygen stream from a bottom portion of the low pressure column.
Claims10
An apparatus for simultaneously producing both high and low purity oxygen, which comprises a double rectification column having therein a lower pressure fractionating means with two reboilers therein, and a higher pressure fractionating means, wherein an intermediate outlet is provided between the two reboilers of the lower pressure fractionating means at least one theoretical stage above the lower of the two reboilers for extracting a low purity oxygen stream therefrom and an outlet for withdrawing a high purity liquid oxygen stream from a bottom portion of said column;
- and which apparatus further comprises conduit means to flow at least a portion of the low-purity oxygen stream to heat exchanging means to produce a low purity oxygen product stream.
Dependencies are inferred from the claim text.