Process for producing diacetoxybutene

Details Process for producing diacetoxybutene Process for producing diacetoxybutene

C - Chemistry, Metallurgy

07

C

260/491.2

C07C 69/16 (2006.01) C07C 67/05 (2006.01)

Patent

CA 1094099

ABSTRACT OF THE DISCLOSURE Diacetoxybutene is produced by reacting butadiene, acetic acid and oxygen in the presence of a palladium type catalyst supported on a carrier wherein a mixed gas of oxygen and an inert gas is used as the oxygen source, the reaction is carried out in an acetoxylation zone under a pressure of 20 to 300 Kg/cm2 G., the reaction mixture is separated by the gas-liquid separation, a part of the separated gas is recycled to the acetoxylation zone, the remainder of the gas is fed to a first butadiene absorption tower to absorb butadiene in acetic acid under a pressure of 20 to 300 Kg/cm2 G., the separated liquid is distilled in a butadiene recovery tower after reducing the pressure to 0 to 20 Kg/cm2 G., the gas containing butadiene discharged from the recovery tower is fed into a second butadiene absorption tower to absorb butadiene into acetic acid under a pressure lower than that at the top of the recovery tower and the acetic acids containing butadiene which are discharged from the first and second butadiene absorption towers are fed into the acetoxyla- tion zone.

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