| 摘要 |
A PROCESS FOR PREPARING 1, 4-BUTANEDIOL BY CONTINUOUS CATALYTIC HYDROGENATION OF 1, 4-BUTYNEDIOL COMPRISES REACTING 1, 4-BUTYNEDIOL WITH HYDROGEN IN THE LIQUID CONTINUOUS PHASE IN THE PRESENCE OF A HETEROGENEOUS HYDROGENATION CATALYST AT FROM 20 TO 300°C, A PRESSURE OF FROM 1 TO 200 BAR AND VALUES OF THE LIQUID-SIDE VOLUMETRIC MASS TRANSFER COEFFICIENT KLA OF FROM 0.1 S-1 TO 1 S-1 A)USING A CATALYST SUSPENDED IN THE REACTION MEDIUM, WHERE IF A PACKED BUBBLE COLUMN IS EMPLOYED THIS IS OPERATED IN THE UPFLOW MODE AND AT A RATIO OF GAS LEAVING THE REACTION VESSEL TO GAS FED TO THE REACTION VESSEL OF FROM 0.99:1 TO 0.4:1, OR B)PASSING THE LIQUID AND GAS IN COCURRENT IN AN UPWARD DIRECTION THROUGH A FIXED-BED REACTOR OPERATED IN THE GAS-CIRCULATION MODE WHILE MAINTAINING A RATIO OF THE GAS FED TO THE REACTION VESSEL TO GAS LEAVING THE REACTION VESSEL OF FROM 0.99:1 TO 0.4:1.
|
