Technology Unit

In the standard thermal Glycol Reaction Process, EO and Water are reacted at an elevated temperature (about 200°C) and pressure without Catalyst. This Process typically yields about 90–92% Monoethylene Glycol (MEG) and 8–10% heavier Glycol Products, mainly Diethylene Glycol (DEG) and Triethylene Glycol (TEG). The proportion of the higher Glycols is limited by using excess Water to minimise the Reaction between the EO and Glycols.

Source: Shell Catalysts & Technologies, 22^nd Mar 2021, ENHANCEMENTS IN ETHYLENE OXIDE/ETHYLENE GLYCOL MANUFACTURING TECHNOLOGY WHITE PAPER.