| 摘要 |
CAS IS SELECTIVELY REMOVED WITH RESPECT TO CO2 FROM A HYDROCARBONACEOUS FLUID STREAM WHICH CONTAINS CO2 AND CAS. EXAMPLES OF THE FLUID STREAM INCLUDE A GAS STREAM, FOR EXAMPLE NATURAL GAS, SYNTHESIS GAS FROM HEAVY OIL OR HEAVY RESIDUES OR REFINERY GAS, OR FROM LIQUID OR LIQUEFIED HYDROCARBONS, FOR EXAMPLE LPG (LIQUEFIED PETROLEUM GAS) OR NGL (NATURAL GAS LIQUIDS). THE PROCESS IS CARRIED OUT BY (1) INTIMATELY CONTACTING THE FLUID STREAM IN AN ABSORPTION OR EXTRACTION ZONE (12) WITH A SCRUBBING LIQUOR CONSISTING OF AN AQUEOUS AMINE SOLUTION CONTAINING FROM 1.5 TO 5 MOL/L OF AN ALIPHATIC ALKANOLAMINE HAVING OF FROM 2 TO 12 CARBON ATOMS AND FROM 0.8 TO 1.7 MOL/L OF AT LEAST ONE ACTIVATOR SELECTED FROM THE GROUP CONSISTING OF PIPERAZINE, METHYL PIPERAZINE AND MORPHO LINE, (2) REMOVING THE CAS ESSENTIALLY COMPLETELY FROM THE FLUID STREAM, AND (3) SEPARATING THE SUBSTANTIALLY COS-DECONTAMINATED FLUID STREAM AND THE CAS-LOADED SCRUBBING LIQUOR AND DISCHARGING THEM FROM THE ABSORPTION OR EXTRACTION ZONE (12).FIG. 1
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