A method for the reaction of low carbon aldehydes catalyzed by liquid base

Abstract

The application discloses a kind of liquid alkali catalysis low aldehyde reaction method: low aldehyde and lye mixture enters first stage reaction kettle aldehyde condensation reaction, part of product reflux first stage reaction kettle, part of product shunt to next stage reaction kettle aldehyde condensation, according to the same method aldehyde condensation gradually, until last stage reaction kettle in aldehyde condensation reaction part of product reflux to last stage reaction kettle, part of product sends to chromatograph, separates condensed aldehyde and lye, condensed aldehyde is discharged as product, part of lye reflux first stage reaction kettle, part of lye shunt oil phase separation tower;Oil phase separation tower, overhead material reflux to first stage reaction kettle, bottom material is introduced into water phase separation tower;Water phase separation tower top water vapor is discharged through defoamer, bottom material is introduced into suspension separator, separated water phase reflux water phase separation tower, solid product is collected.The application compared with original process and equipment, stabilize the working condition, reduce the occurrence of side reaction, completely solve the problem of three waste emissions.

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