Three-tower continuous distillation process of ethyl acetate from aldehyde condensation and purification by gas-phase oxidation of acetic acid and ethylene were also discussed.

The corrosion of aldehyde condensation solution has been a great difficult technical problem in polyvinyl alcohol fibre production industry, which has been hindering the normal operation of the plant.

It can be used as catalyst or catalyst carrier for dewaxing via isomerization, selective hydrogenation, cracking, condensation of alcohol and aldehyde, etc.