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US 4,780,118 AGranted
Process and apparatus to produce ultra high purity oxygen from a liquid feed
AssigneeUnion Carbide Corporation
InventorHarry Cheung
Life of this patent
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Abstract
A process and apparatus to produce ultra high purity oxygen comprising serially oriented stripping and absorbing columns having defined flow stream relationships.
Claims23
A process to produce ultra high purity oxygen from a liquid feed comprising:
- (a) introducing feed liquid containing oxygen, light impurities and heavy impurities into a stripping column;
- (b) passing feed liquid down the stripping column and stripping light impurities from downflowing liquid into upflowing vapor;
- (c) vaporizing resulting liquid, passing a first vapor portion thereof into an absorbing column, and passing a second portion thereof up the stripping column as said upflowing vapor;
- (d) passing first vapor portion up the absorbing column and absorbing heavy impurities from ascending vapor into descending liquid to produce ultra high purity oxygen vapor;
- (e) condensing ultra high purity oxygen vapor and passing resulting ultra high purity oxygen liquid down the absorbing column as descending liquid, and
- (f) recovering product ultra high purity oxygen.
3 more elements
Apparatus to produce ultra high purity oxygen from a liquid feed comprising:
- (a) a stripping column having a reboiler;
- (b) an absorbing column having a condenser;
- (c) conduit means from the vaporizing side of the reboiler to the lower portion of the absorbing column;
- (d) conduit means from the condensing side of the reboiler to the vaporizing side of the condenser;
- and
- (e) means to recover fluid from the absorbing column.
3 more elements
Apparatus to produce ultra high purity oxygen from a liquid feed comprising:
- (a) a stripping column having a reboiler;
- (b) an absorbing column having a condenser;
- (c) conduit means from the vaporizing side of the reboiler to the lower portion of the absorbing column;
- (d) conduit means from the condensing side of the reboiler to the upper portion of the absorbing column;
- and
- (e) means to recover fluid from the absorbing column;
- further comprising (A) a liquid reservoir in flow communication by conduit means with at least one of:
- (i) the condensing side of the reboiler,
- (ii) the lower portion of the stripping column;
- and
- (iii) the lower portion of the absorbing column;
- and
- (B) means to pass vapor from the liquid reservoir to the condensing side of the reboiler and means to pass liquid out from the liquid reservoir.
10 more elements
Dependencies are inferred from the claim text.