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Method for removing carbon dioxide from combustion exhaust gas

  • US 6,036,931 A
  • Filed: 06/03/1997
  • Issued: 03/14/2000
  • Est. Priority Date: 02/27/1992
  • Status: Expired due to Term
First Claim
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1. A method for removing carbon dioxide from a combustion exhaust gas which comprises the step of bringing said combustion exhaust gas under atmospheric pressure into contact with a mixed aqueous solution of 100 parts by weight of an amine compound (X) which has one alcoholic hydroxyl group and a primary amino group in its molecule, said primary amino group being bonded to a tertiary carbon atom having two unsubstituted alkyl groups;

  • and 1-25 parts by weight of an amine compound (Y) selected from the groups consisting of (E) piperidine, (F) morpholine, (G) glycine, and (H) a compound having one alcoholic hydroxyl group and a secondary amino group in its molecule, said secondary amino group having an unsubstituted alkyl group of 3 or less carbon atoms and an N atom bonded to a group having a chain of 2 or more carbon atoms.

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