| abstract |
In the present invention, in the production of glycol esters using glycol ethers and carboxylic acids, the conversion of glycol ethers is increased at low temperature and pressure, and the reaction distillation column is used to minimize the amount of reflux and reduce the amount of impurities. It is intended to provide a process for the preparation of glycol esters. In addition, the present invention injects the carboxylic acid in excess of the number of moles of glycol ether, and easily separates the glycol ester and the carboxylic acid under the pressurized conditions to reduce the loss of the glycol ester to the top of the reaction distillation column, and separate azeotropic distillation apparatus The present invention provides a method for preparing an electronic glycol ester, which simplifies the process of a post separation column. |