| 摘要 |
<p>The invention relates to hydroxy pivalin aldehyde, which is produced by the aldolization of isobutyraldehyde with formaldehyde and subsequent processing of the reaction product by distillation, wherein the reaction product is fed to a distillation column, which is operated at a top pressure ranging between 0.5 and 1.5 bar and in which a two-stage condensation process is provided in the top region. In this process, the vapors are first fed to a partial condenser operated at a temperature ranging between 50 and 80°C, the condensate of which is returned at least partially to the distillation column, and the vapors that are not condensed in the partial condenser are fed to a downstream condenser operated at a temperature ranging between-40°and +30°C, the condensate of which is discharged at least partially.</p> |
