METHOD FOR CLEAVING MICHAEL ADDUCTS THAT ARE CONTAINED IN A FLUID F AND THAT WERE FORMED IN THE PRODUCTION OF ACRYLIC ACID OR ESTERS THEREOF

摘要

The invention relates to a method for cleaving Michael adducts that are contained in a fluid F at a weight proportion of = 10 wt % and that were formed in the production of acrylic acid or esters thereof, in a cleaving device, which comprises a pump P and a separation column K having installations that effect separation and a recirculation heat exchanger UW, wherein for the purpose of feeding the cleaving energy, the pump P draws sump fluid from the sump chamber of the separation column K and continuously feeds said sump fluid back into the sump chamber above the level of the sump fluid through the recirculation heat exchanger UW, and wherein the pump P is a radial centrifugal pump having an open impeller.