| 摘要 |
A METHOD OF MANUFACTURING (METH)ACRYLIC ACID INCLUDES: A REACTION STEP (1) OF CARRYING OUT A CATALYTIC GAS-PHASE OXIDATION REACTION; AN ABSORBING STEP (2) OF ABSORBING (METH)ACRYLIC ACID FROM A (METH)ACRYLIC-ACID-CONTAINING MIXED GAS PREPARED IN THE REACTION STEP; A REFINEMENT STEP (3, 4,5,6,7,8,9,10,11,12,41,43,44) OF SEPARATING, REFINING, AND RECOVERING (METH)ACRYLIC ACID FROM A (METH)ACRYLIC-ACID-CONTAINING LIQUID PREPARED IN THE ABSORBING STEP (2); AND A RECIRCULATION STEP (28, 29, 30, 31, 52, 53, 61, 62, 63, 64) OF RECIRCULATING (METH)ACRYLIC ACID CONTAINED IN A VENT GAS PRODUCED IN THE REFINEMENT STEP TO THE ABSORBING STEP (2) AND/OR THE REFINEMENT STEP (3, 4,5,6,7,8,9, 10, 11, 12,41,43,44). |
