Patent ID: 7789945

Claim:
A process for separation, recovery and utilization of gas streams comprising sulfur compounds, carbon dioxide and carbon monoxide from a synthesis gas comprising an unshifted synthesis gas or a partially shifted synthesis gas produced from high pressure partial oxidation of a hydrocarbonaceous reactant while removing carbon monoxide from said gas streams and concentrating said CO in a shifted synthesis gas stream, said process comprising: a) contacting the synthesis gas with a first liquid solvent in a first carbon dioxide absorber to selectively absorb and remove at least a portion of carbon dioxide from the synthesis gas and to produce a purified synthesis gas; b) sending a portion of said first liquid solvent to a second carbon dioxide absorber wherein a fully shifted synthesis gas is contacted with said first liquid solvent mixed with a second liquid solvent before entering said second carbon dioxide absorber to remove CO 2 from said shifted synthesis gas to produce a purified shifted synthesis gas and wherein at least a portion of CO from said first liquid solvent is transferred to said purified shifted synthesis gas; and c) removing carbon dioxide from a loaded solvent stream to produce a carbon dioxide product stream.