| abstract |
The invention relates to a method for purifying hydroxypivalaldehyde, which comprises the following steps: (1) using formaldehyde and isobutyraldehyde as raw materials to carry out an aldol condensation reaction to obtain a reaction solution containing hydroxypivalaldehyde; The reaction solution is slowly dropped into water, the temperature of the system is controlled to be 20-30° C., after adding hydroxypivalaldehyde seed crystals, the temperature is slowly lowered to 0-5° C., and the temperature is kept for crystallization. The purification solvent used in the method provided by the invention is water, the reaction time is short, the steps are simple, and the obtained hydroxypivalaldehyde product has high purity, good crystal form and is easy to dry. |