Process for preparing 1,3-diketones
AssigneeWacker Chemie AG
InventorsDominik Dempf, Thomas List, Wolfgang Deinhammer, Georges Heyen
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Abstract
The invention provides a process for preparing 1,3-diketones by rearrangement of the isomeric enol ester in a tube reactor comprising a heated portion and an unheated insulated portion which can optionally be provided with cooling means. The unheated portion of the reactor has a higher volume to surface ratio than the heated portion of the reactor. The reaction can be carried out adiabatically in the unheated portion of the reactor. The process and apparatus provide higher yields and selectivity to the 1,3-diketones.
Claims17
A process for preparing 1,3-diketones by thermal rearrangement of a corresponding isomeric enol ester in a tube reactor at a temperature of from 350° C. to 700° C. and subsequent cooling and work-up of the reaction product by distillation, wherein the tube reactor consisting essentially of a heated first tube section which extends over a region from at least ¼ to at most ¾ of a total tube length, measured from the reactor inlet, and a remaining unheated thermally insulated, second tube section.
Dependencies are inferred from the claim text.