公开(公告)号：US20230174452A1

公开(公告)日：2023-06-08

申请号：US17921997

申请日：2021-04-26

Applicant: BASF SE

Inventor： Tile GIESHOFF ,  Ulrich HAMMON ,  Christian RAITH ,  Volker SCHLIEPHAKE ,  Anna Katharina DUERR ,  Tim VAN LOOVEREN ,  Christian REIN

IPC: C07C51/44

CPC classification number: C07C51/44

Abstract: The present invention relates to a method of redissociating Michael adducts of acrylic acid present in a liquid F in a redissociation apparatus comprising at least one separating column K, an evaporator V and a pump P, wherein, in the event of an unwanted rise in the viscosity of the residue R in the bottom space of the separating column K, the feed of the liquid F into the redissociation apparatus is stopped, the residue R in the bottom space of the separating column K is diluted and cooled with a solvent 1, and the bottom space of the separating column K is emptied.