Method for producing polyether carbonate polyols

• Main Authors: BRAUN SIMON, BACHMANN ROLF, BECKER DIRK, BACHMANN PETER, BECKER BARBARA, BELL FRANCES
• Format: Patent
• Language: Chinese; English
• Published: 18.10.2022
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP

The invention relates to a method for starting up a reactor for the continuous production of polyether carbonate polyols by adding alkylene oxides and carbon dioxide to H-functional starter substances in the presence of a DMC catalyst and/or a metal complex catalyst based on the metals cobalt and/or zinc, in the process: (alpha) a partial amount of an H-functional starter substance and/or a suspension medium free of H functions is mixed in a reactor with a DMC catalyst and/or a metal complex catalyst based on metals zinc and/or cobalt, wherein the DMC catalyst and/or the metal complex catalyst has a concentration s in the mixture; and (gamma) after step (alpha), continuously metering an H-functional starter substance, an alkylene oxide and a DMC catalyst and/or a metal complex catalyst based on metals zinc and/or cobalt into the reactor in an addition process and continuously removing the resulting reaction mixture from the reactor in order to achieve a steady state, characterized in that in step (alpha), in