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AssigneeCovestro Deutschland AG
InventorsStefanie Braun, Horst Zwick, Matthias Wohak, Jörg Hofmann, Aurel Wolf, Michael Traving, Rolf Bachmann
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The present invention relates to a method for producing polyether carbonate polyols by addition of one or more alkylene oxides and carbon dioxide to one or more H-functional starter substances in the presence of at least one DMC catalyst, in which the reaction is conducted in a main reactor (8) and a tubular reactor (11, 17) connected as a post reactor downstream thereof, wherein the method is characterized in that at the outlet (13) of the tubular reactor (11, 17) a temperature is set that is at least 10° C. above the temperature in the inside of the main reactor (8). The invention further relates to a device for carrying out said method.
A process for preparing polyether carbonate polyols by adding one or more alkylene oxides and carbon dioxide onto one or more H-functional starter substances in the presence of at least one DMC catalyst, wherein the reaction is conducted in a main reactor and in a tubular reactor, wherein the tubular reactor is positioned downstream of the main reactor as a postreactor, wherein a reaction product flows from the main reactor into the tubular reactor, and wherein a temperature at the exit of the tubular reactor is set at least 10° C. above the temperature within the main reactor.
An apparatus for preparing polyether carbonate polyols by adding one or more alkylene oxides and carbon dioxide onto one or more H-functional starter substances in the presence of at least one DMC catalyst, wherein the apparatus comprises a main reactor and a tubular reactor, wherein the tubular reactor is positioned downstream of the main reactor as a postreactor, wherein a reaction product flows from the main reactor into the tubular reactor, wherein a temperature at the exit of the tubular reactor is set at least 10° C. above the temperature within the main reactor, and wherein the temperature at the exit of the tubular reactor is set via a heating unit.
An apparatus for preparing polyether carbonate polyols by adding one or more alkylene oxides and carbon dioxide onto one or more H-functional starter substances in the presence of at least one DMC catalyst, wherein the apparatus comprises a main reactor and a tubular reactor, wherein the tubular reactor is positioned downstream of the main reactor as a postreactor, wherein a reaction product flows from the main reactor into the tubular reactor, wherein a temperature at the exit of the tubular reactor is set at least 10° C. above the temperature within the main reactor, wherein the temperature at the exit of the tubular reactor is set via an insulation of the tubular reactor.
Dependencies are inferred from the claim text.