Method For The Combined Production of Polyols In The Presence Of An Inorganic Base
AssigneeOxea GmbH
InventorsGuido D. FREY, Melanie BOTHE, Heinz STRUTZ, William E. Slinkard
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Abstract
The present invention relates to a process for simultaneously consecutive preparation of polyols by base-catalysed reaction of at least two different mid-chain aldehydes with formaldehyde. The simultaneous consecutive mode of operation makes it possible to achieve high conversions and high selectivities for both aldehydes, with additional achievement of a distinct reduction in the amount of unreacted formaldehyde remaining. This leads to improved process economics, since the energy costs for workup of the formaldehyde stream are distinctly reduced.
Claims20
A process for simultaneously consecutive preparation of at least two different polyols by reaction of aliphatic aldehydes with formaldehyde in the presence of an inorganic base, characterized in that, in a 1st process step, an aliphatic C2-C9 aldehyde is reacted with formaldehyde in the presence of an inorganic base and, without workup of the reaction solution, in a 2nd process step, the reaction solution from the 1st process step is converted further with addition of at least one aliphatic C2-C9 aldehyde other than the aldehyde from the 1st process step.
Dependencies are inferred from the claim text.