发明名称 |
Separation of carbon monoxide from nitrogen-contaminated gaseous mixtures |
摘要 |
Carbon monoxide is separated from a gaseous mixture (Figure 2, 1) containing hydrogen and contaminated with nitrogen by separating (7, 10, 21) hydrogen and carbon monoxide contents to provide a carbon monoxide-enriched nitrogen-containing stream (22) and separating carbon monoxide and nitrogen contents of said stream in a nitrogen-separation column (31) to provide a nitrogen-enriched overheads vapour (32) and a nitrogen-freed bottoms liquid (33). The overheads vapour (32) is washed (47) with liquid nitrogen (48) to remove carbon monoxide therefrom and the resultant carbon monoxide-enriched liquid nitrogen is returned to said column as additional reflux. The liquid nitrogen wash (47) simultaneously reduces the loss of carbon monoxide with the nitrogen-enriched vapour and provides refrigeration to the process. When the gaseous feed is a synthesis gas also containing methane, the methane and carbon monoxide contents can be separated (21) before or after separation (31) of the nitrogen and carbon monoxide contents. <IMAGE> |
申请公布号 |
EP0928936(A3) |
申请公布日期 |
1999.10.13 |
申请号 |
EP19990300070 |
申请日期 |
1999.01.06 |
申请人 |
AIR PRODUCTS AND CHEMICALS, INC. |
发明人 |
MCNEIL, BRIAN ALFRED;SCHARPF, ERIC WILLIAM |
分类号 |
F25J3/02;F25J3/06 |
主分类号 |
F25J3/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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