Process for carbon dioxide recovery from a process tool
AssigneePraxair Technology, Inc.
InventorsJohn Frederic Billingham, Thomas John Bergman, Jr., Richard Martin Kelly, Kenneth Leroy Burgers, William Thoru Kobayashi
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Abstract
A system for removing and purifying a carbon dioxide-containing stream from a batch process tool is provided. A multi-phase contaminated stream containing at least carbon dioxide and one or more co-solvent is removed from a process tool and conveyed to at least one intermediate pressure separator. The contaminant-containing stream is separated into an intermediate pressure carbon dioxide-enriched vapor stream and an intermediate pressure solvent and contaminant-enriched stream in the intermediate pressure separator.
Claims25
A process for purifying at least one carbon dioxide-containing stream from a batch process tool, comprising:
- (a) removing at least one contaminated stream containing at least carbon dioxide, one or more co-solvents and one or more contaminants from said batch process tool, and reducing the pressure of said contaminated stream producing a multi-phase contaminated stream;
- (b) conveying said multi-phase contaminated stream to an intermediate pressure separator operating at a pressure between about 200-900 psig;
- (c) separating the multi-phase contaminated stream into an intermediate pressure carbon dioxide-enriched vapor stream and intermediate pressure solvent and contaminant-enriched stream in said intermediate pressure separator;
- (d) wherein the intermediate pressure solvent and contaminant-enriched stream is removed from said intermediate pressure separator and is conveyed to a low pressure separator;
- and
- (e) separating the solvent and contaminent enriched stream of step (d) into a low pressure carbon dioxide enriched vapor stream and a low pressure solvent and contaminant enriched stream in said low pressure separator operating at approximate ambient pressure.
A process for purifying at least one carbon dioxide containing stream from a batch process tool, comprising:
- (a) supplying one or more first co-solvents and purified carbon dioxide to a process tool, and forming a first contaminated stream in said process tool;
- (b) conveying said first contaminated stream in multi-phase form to a first intermediate or low pressure separator, wherein said first contaminated stream is separated into a carbon dioxide-enriched stream and a first co-solvent-enriched stream;
- (c) supplying a second co-solvent and purified carbon dioxide to said process tool, forming a second contaminated stream in said process tool;
- and
- (d) conveying said second contaminated stream in multi-phase form to a second intermediate or low pressure separator, wherein said second contaminated stream is separated into a carbon dioxide-enriched stream and a second co-solvent-enriched stream and e) separately collecting said first and second separated co-solvent-enriched streams.
Dependencies are inferred from the claim text.