| 摘要 |
A PROCESS FOR PREPARING BUTADIENE, COMPRISING NONOXIDATIVELY DEHYDROGENATING N-BUTANE FROM A STREAM (4) (A) IN A FIRST DEHYDROGENATION ZONE (18) TO OBTAIN STREAM (5) (B) COMPRISING I-BUTENE AND 2-BUTENE; OXIDATIVELY DEHYDROGENATING THE I-BUTENE AND 2-BUTENE OF (B) IN THE PRESENCE OF AN OXYGENOUS GAS (6) IN A SECOND DEHYDROGENATION ZONE (19) TO OBTAIN STREAM (C) COMPRISING N-BUTANE, BUTADIENE, HYDROGEN, CARBON DIOXIDE, AND STEAM; COMPRESSING (21) AND COOLING (C) TO OBTAIN STREAM (D2) COMPRISING N-BUTANE, BUTADIENE, HYDROGEN, CARBON DIOXIDE, AND STEAM; EXTRACTIVELY DISTILLING (22) (D2) INTO STREAM (E1) COMPRISING BUTADIENE AND STREAM (E2) COMPRISING N-BUTANE, HYDROGEN, CARBON DIOXIDE, AND STEAM; COMPRESSING (23, 24) AND COOLING (E2) TO OBTAIN STREAM (FL) COMPRISING N-BUTANE AND WATER AND STREAM (F2) COMPRISING N-BUTANE, HYDROGEN, AND CARBON DIOXIDE; COOLING (F2) TO OBTAIN STREAM (G1) COMPRISING N-BUTANE AND STREAM (G2) COMPRISING CARBON DIOXIDE AND HYDROGEN; PHASE SEPARATING WATER FROM (FL) TO OBTAIN STREAM (H1) COMPRISING N-BUTANE; AND RECYCLING (HI) INTO THE FIRST DEHYDROGENATION ZONE (18).
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