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A process for producing substantially pure liquid carbon dioxide from a carbon dioxide feed containing about 35 to about 98% by volume of carbon dioxide wherein a waste stream containing carbon dioxide is separated from contaminants in a pressure swing adsorption apparatus and then recycled to the c

A process for producing substantially pure liquid carbon dioxide from a carbon dioxide feed containing about 35 to about 98% by volume of carbon dioxide wherein a waste stream containing carbon dioxide is separated from contaminants in a pressure swing adsorption apparatus and then recycled to the carbon dioxide feed, and a system for recovering spent carbon dioxide from a refrigeration system using liquid carbon dioxide as a freezing agent.

대표청구항 ▼

A process for producing substantially pure carbon dioxide from a carbon dioxide feed containing from about 35 to about 98 percent by volume of carbon dioxide, comprising: (a) distilling the carbon dioxide feed to thereby form a liquid product containing substantially pure carbon dioxide and a first

A process for producing substantially pure carbon dioxide from a carbon dioxide feed containing from about 35 to about 98 percent by volume of carbon dioxide, comprising: (a) distilling the carbon dioxide feed to thereby form a liquid product containing substantially pure carbon dioxide and a first waste stream containing carbon dioxide; (b) forwarding the first waste stream to a pressure swing adsorption means to thereby separate the first waste stream into a carbon dioxide-enriched stream and a carbon dioxide-depleted second waste stream; and (c) recycling the carbon dioxide-enriched stream via combination with the carbon dioxide feed.