The invention discloses a method for recovering 1,4-
butanediol from a waste liquor generated in production of 1,4-
butanediol through a Reppe method. The method comprises the following steps: (1) adding an alkaline substance serving as an additive into a
raw material, namely the waste liquor generated in production of 1,4-
butanediol, ensuring that the
mass ratio of the additive to the
raw material is (1-9):600, and stirring and mixing uniformly; and (2) putting the mixture into an intermittent rectifying
tower for intermittent rectification, and recovering the 1,4-butanediol. The method has the advantages that: (1) a small amount of additive is added, so that the
mass percentage of a 1,4-butanediol product and the
recovery rate of the 1,4-butanediol are obviously improved; (2) only one piece of intermittent rectifying equipment is used, and the technological operation is flexible, simple and convenient; (3) the additive is cheap and readily available, low in
recovery cost and high in economy; (4) the process application range is wide, the method is suitable for recovering and purifying the 1,4-butanediol from waste liquors in different concentration generated in the production of the 1,4-butanediol through the Reppe method, and the
recovery rate can reach 80 percent; and (5) the waste liquor resource is fully utilized, the waste emission is reduced to the greatest extent, and the method is favorable for protecting environment and convenient to promote and apply.