Process for preparing esters of carboxylic acids

Details Process for preparing esters of carboxylic acids Process for preparing esters of carboxylic acids

1998-07-06

2000-02-22

Ambrose, Michael G.

Organic compounds -- part of the class 532-570 series

Organic compounds

Carboxylic acid esters

C07C 6708

Patent

active

060282150

ABSTRACT:
A process for preparing esters from alcohol and carboxylic acid by a) feeding a mixture, comprising at least alcohol and/or carboxylic acid as educts, into a distillation column with separated sections containing reactive and conventional internals, wherein the reactive internals are arranged below the inlet of the mixture and conventional internals are arranged above the inlet of the mixture, b) reaction of the alcohol and the carboxylic acid in the reactive internals in presence of a catalyst, c) distillative separation of the evolving reaction mixture into the higher boiling ester and a lower boiling azeotrope containing alcohol, water and ester, wherein the ester accumulates in the bottom and the azeotrope is removed overhead, d) separation of the azeotrope in a phase separator in an aqueous phase and in an organic phase and the organic phase to be returned to the top of the column, wherein in step b) a heterogenous catalyst is utilized and in step c) the ester is taken off above the bottom as pure product between further conventional internals which differ in their arrangement from those in step a) and which are arranged above the inlet of a circulating evaporator.

REFERENCES:
patent: 4314947 (1982-02-01), Hohenschutz et al.
patent: 4939294 (1990-07-01), Agreda et al.
patent: 5008046 (1991-04-01), Bremus et al.

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