Process for the preparation of esters
AssigneeHuls Aktiengesellschaft
InventorsJohn Kahsnitz, Alfred Oberholz, Udo Knippenberg, Michael Zolffel
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Abstract
Alcohols and acids are esterified by means of liquid-phase equilibrium reactions on ion exchangers in an apparatus comprising a prereactor and a rectifying column with external reactors. The process is characterized by the fact that a portion of one of the starting compounds is fed directly to the external reactors.
Claims12
A process for the preparation of an ester, comprising reacting an alcohol and an acid by means of a liquid-phase equilibrium reaction on an ion exchanger in a prereactor to obtain reaction products, and separating said reaction products in a rectifying column with one or more external reactors, wherein the liquid phase on a plate of said rectifying column is withdrawn, is directed to an external reactor and then returned to the next lower plate of said rectifying column, wherein an additional amount of said alcohol or said acid is also fed directly to at least one of said external reactors.
Dependencies are inferred from the claim text.