Ethylene glycol production
The reaction of ethylene oxide (EO) with water produces Ethylene glycols. EO is thermally converted to mono-ethylene glycol (MEG), di-ethylene glycol (DEG) and tri-ethylene glycol (TEG). Mass transfer equipment is used in the excess water removal step and in the glycol separation train.

Multi-stage evaporators
Some plant designs use trays or packings in the multi-stage evaporators.
  • Trays, such as FLEXITRAY® valve trays, can minimize cost of the internals.
  • Random packing can reduce pressure drop and tower size.
FLEXITRAY® valve tray
INTALOX® ULTRA random packing

Koch-Glitsch typically supplies INTALOX® ULTRA random packing and FLEXIPAC® and FLEXIPAC® HC® structured packings in multi-stage evaporators.

Glycol separation train

A three-column distillation train separates the glycols, namely MEG, DEG, and TEG. For improved separation and to run at low temperatures, the columns are operated under vacuum conditions.

FLEXIPAC® and FLEXIPAC® HC® structured packing and BX wire gauze structured packing offer very high efficiency with low pressure drop.

The benefits are lower bottoms temperature, less product loss due to degradation, increased capacity, and lower energy consumption.

FLEXIPAC® HC® high capacity structured packing