Process for making glycol ether acetates

Details Process for making glycol ether acetates Process for making glycol ether acetates

1995-07-07

1997-08-19

Dees, Jose'G.

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

Organic compounds

Carboxylic acid esters

560239, C07C 6724

Patent

active

056590733

ABSTRACT:
Disclosed is a method of making a glycol ether acetate. Acetic acid is reacted with a glycol ether at a molar ratio of about 1.1 to about 2, in a mixture with a catalyst and an azeotropic agent which can be either butyl acetate or dibutyl ether. The mixture is heated to a temperature and pressure sufficient to vaporize an azeotrope of water and the azeotropic agent. In another embodiment of the invention, a glycol ether acetate is made by preparing a reaction mixture of acetic acid and a glycol ether in a molar ratio of about 1.1 to about 1.2, about 5 to about 25 wt % n-butanol, an additional amount of acetic acid stoichiometric with the amount of n-butanol, and a catalyst. The reaction mixture is heated to form a glycol ether acetate, water, and butyl acetate. The azeotrope, excess acetic acid, butyl acetate, and glycol ether are successively removed by distillation.

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