Treatment method of acrolein production residual liquid

The invention provides a treatment method of an acrolein production residual liquid. The treatment method comprises the following steps: adding a first alkaline liquid into the acrolein production residual liquid under the condition of stirring to neutralize the residual liquid, cooling a reaction system, then, adding a second alkaline liquid, heating and reacting to obtain sodium acrylate. Compared with the prior art, the treatment method has the advantages that the sodium acrylate is prepared from the acrolein production residual liquid, and the acrolein production residual liquid contains 3-9% of acrylic acid with relatively low concentration, therefore, when the acrolein production residual liquid is mixed with the alkaline liquids for reacting, polymerization and other side reactions can be avoided; meanwhile, the sodium acrylate obtained after the reaction is ended can be separated from water by using a common distillation method, so that the treatment cost of the acrolein production residual liquid is