The purification method of an aldehyde compound of the present invention includes a step of neutralizing a reaction solution containing an aldehyde compound by adding water and a base compound to the reaction solution, and a step of distilling the neutralized reaction solution, in which the reaction solution is obtained by reacting a compound represented by the following Formula (a1) or (a2) with hydrogen and carbon monoxide in the presence of a metal compound of groups 8 to 10 and a phosphorus compound, the phosphorus compound is represented by Formula (R
1
O)
3
P, and the base compound is at least one kind selected from among carbonate and hydrogen carbonate of metals of group I on the periodic table and carbonate and hydrogen carbonate of metals of group II on the periodic table.
本发明的醛化合物的纯化方法包括以下步骤:通过向含有醛化合物的反应溶液中加入
水和碱性化合物来中和反应溶液,以及蒸馏中和后的反应溶液。其中,该反应溶液是通过在8至10族
金属化合物和
磷化合物存在下,将以下式(a1)或(a2)所代表的化合物与
氢气和
一氧化碳反应而得到的。
磷化合物由式(R1O)3P表示,碱性化合物是周期表上I族
金属的
碳酸盐和氢
碳酸盐以及II族
金属的
碳酸盐和氢
碳酸盐中至少选择一种。