A process for redissociating Michael adducts which are present in a liquid F with a proportion by weight, based on the weight of the liquid F, of ≥ 10% by weight and have been formed in the preparation of acrylic acid or esters thereof in a redissociating apparatus which comprises at least one pump P, a separating column K which consists, from the bottom upward, of a bottom space, a separating space which adjoins the bottom space and comprises separating internals, and a top space which adjoins the separating space, and in which the pressure in the gas phase decreases from the bottom upward, and an indirect circulation heat exchanger UW which has at least one secondary space and at least one primary space separated from the at least one secondary space by a material dividing wall D, in which the liquid F is conducted continuously into the separating column K with the feed temperature T Z at a feed point I which is above the lowermost separating internal in the separating column K, and, at the lowest point in the bottom space of the separating column K, the pump P is used to continuously withdraw a mass flow Ṁ of the liquid which effluxes into the bottom space through the separating internals and comprises Michael adducts with a temperature T SU so as to establish, in the bottom space, as the bottoms liquid, a level S of the liquid effluxing into it which is less than half the distance A, measured from the lowest point in the separating column K to the underside of the lowermost separating internal in the separating column K, while a gas pressure GD exists in the remaining space of the bottom space above this liquid level, and at least one substream I of the mass flow Ṁ is conducted through the at least one secondary space of the indirect circulation heat exchanger UW while being heated, by indirect heat exchange with a fluid heat carrier conducted simultaneously through the at least one primary space of the circulation heat exchanger UW, to a redissociation temperature T RS above the temperature T SU, and at least one substream II from the mass flow Ṁ* conducted out of the at least one secondary space of the circulation heat exchanger UW with the temperature T RS is recycled into the bottom space of the separating column K at a feed point II which is below the lowermost separating internal of the separating column K and above the level S of the bottoms liquid, in such a way that the at least one substream II in the bottom space of the separating column K is not directed toward the bottoms liquid, and a substream at least of one of the two streams Ṁ, Ṁ * is discharged as a residual stream, with the proviso that the redissociation temperature T RS is such that, firstly, as it flows through the at least one secondary space of the circulation heat exchanger UW, at least a portion of the Michael adducts present in the at least one substream I is redissociated to form the corresponding redissociation products, and, secondly, the at least one substream II recycled into the separating column K boils at the gas pressure GD existing in the bottom space at the feed point II, and the gas phase which forms in the course of boiling and comprises at least a portion of the redissociation products, following the gas pressure which decreases in the separating column K toward the top space of the separating column K, flows as a gas stream G comprising redissociation products into the top space of the separating column K and the gas stream G is partly condensed by direct and/or indirect cooling still in the top space of the separating column K and/or conducted out of the top space of the separating column K, the condensate formed is recycled at least partly as reflux liquid into the separating column K and the gas stream which remains in the partial condensation is discharged, wherein the pump P is a radial centrifugal pump with a semiopen radial impeller.