Process for producing organic esters by reacting a carboxylic ac

Details Process for producing organic esters by reacting a carboxylic ac Process for producing organic esters by reacting a carboxylic ac

1992-04-15

1993-05-25

Shippen, Michael L.

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

Organic compounds

Carboxylic acid esters

C07C 6724

Patent

active

052142000

ABSTRACT:
The present invention is a process for producing organic esters wherein a dialkyl ether and a carboxylic acid are reacted in the presence of a catalyst consisting essentially of an iodide of a Group IA element under reaction conditions sufficient to form a reaction mixture comprising the desired organic ester and an alcohol and recovering the ester from the reaction product mixture. For example, methyl acetate can be prepared by reacting dimethyl ether and acetic acid in the presence of a hydrogen iodide or lithium iodide catalyst under conditions sufficient to form methyl acetate and methanol. While typical processes produce an azeotropic mixture of the desired organic ester and water, the claimed process utilizes a combination or reactants and catalysts wherein water is not produced in appreciable amounts. Therefore, the organic ester product can be separated conveniently thereby avoiding a cumbersome azeotropic distillation step as required in prior art processes.

REFERENCES:
patent: 2030835 (1936-02-01), Cox
patent: 3510511 (1970-05-01), Conseiller et al.
Derevitskaya & Coworkers, Tetrahedron Letters, 49 (1970) 4269.

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