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US 5,927,103 AGranted
Carbon dioxide production system with integral vent gas condenser
AssigneePraxair Technology, Inc.
InventorHenry Edward Howard
Life of this patent
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Abstract
A system for producing carbon dioxide, particularly from a feed which contains significant levels of light contaminants, wherein light overhead from a distillation column is partially condensed against heat exchange fluid containing both carbon dioxide and light contaminants and the resulting heat exchange fluid passed into the feed for the distillation column.
Claims10
A method for producing carbon dioxide comprising:
- (A) providing a feed comprising carbon dioxide and light contaminants and passing said feed into a column;
- (B) separating the feed within the column into light overhead and carbon dioxide product;
- (C) withdrawing light overhead from the column and partially condensing light overhead by indirect heat exchange with heat exchange fluid comprising carbon dioxide and light contaminants to produce gaseous heat exchange fluid;
- (D) passing the gaseous heat exchange fluid into the feed upstream of the column;
- and
- (E) recovering carbon dioxide product from the lower portion of the column.
3 more elements
Apparatus for producing carbon dioxide comprising:
- (A) a column and feed provision means for passing a feed comprising carbon dioxide and light contaminants into the column;
- (B) a vent gas condenser and means for passing fluid from the upper portion of the column to the vent gas condenser;
- (C) a phase separator and means for passing fluid from the vent gas condenser to the phase separator;
- (D) means for passing fluid from the phase separator to the vent gas condenser and from the vent gas condenser to the feed provision means;
- and
- (E) means for recovering carbon dioxide product from the lower portion of the column.
3 more elements
Dependencies are inferred from the claim text.