Hydroxy pivaldehyde included with different aldehydes reaction of butyl formaldehyde, in the proportion of approximate 1:2, in a catalytic amount of three procedures exist, produce reaction mixture, contains 42 to 50 wt % of hydroxyl-pivaldehyde production process, 28 to 35 wt isubutyraldehyde %, about 18% of the water, about 2 wt % 3 procedures and the second reaction product of about 18%, and restore the hydroxyl pivaldehyde from this. Recovery steps include at least a part of the weight of the water with 1 part of the solution, distillation reduced pressure obtained solution, in temperature below 65 ℃, produce a kind of fractions contain different butyl aldehyde, three procedures and water, and water solution pivaldehyde containing hydroxyl, containing hydroxyl in aqueous solution pivaldehyde cooling, cooling solution containing hydroxyl pivaldehyde about 15 ° ~ 20 ° C to lead to the crystallization of hydroxyl-pivaldehyde, filter to get crystals, crystal with cold water to wash water, and then the dry air in the crystal, and by the mother liquor crystallization liquid-liquid extraction in the environmental temperature use about a different 3 (butyl quantity the mother liquor.
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