Patent Number: 6,309,445

Title: Removal of carbon dioxide from gas streams

Abstract: Carbon dioxide is removed from gas streams comprised predominantly of gases that are less strongly adsorbed than is carbon dioxide by passing the gas stream through a bed of type X zeolite having a silicon to aluminum atomic ratio not greater than about 1.15 and at least 75% of the exchangeable cations of which are potassium ions, thereby adsorbing the carbon dioxide from the gas stream. The process is particularly advantageous when applied to the removal of low levels of carbon dioxide from gas streams at temperatures of about 0 to 80.degree. C.

Inventors: Gittleman; Craig S. (Fanwood, NJ), Ojo; Adeola Florence (Scotch Plains, NJ), Fitch; Frank R. (Bedminster, NJ), Bulow; Martin (Basking Ridge, NJ), Balse; Vijay R. (Chatham, NJ), Connolly; Philip (Philadelphia, PA)

Assignee: The BOC Group, Inc.

International Classification: B01D 53/26 (20060101); B01D 53/04 (20060101); B01D 053/04 (); B01D 053/26 ()

Expiration Date: 10/30/2018