Glycol recovery method, especially for glycol used to deice aircraft or runways, involves reverse osmosis step

摘要

At least one reverse osmosis step (4, 5) is used to increase glycol concentration prior to an evaporation step (6) in which water is removed. A method for recovering glycol from a mixture predominantly comprising glycol and water comprises the following steps : (a) at least one reverse osmosis step in order to increase glycol concentration to a suitable level ; and (b) evaporation until the glycol concentration reaches a standard use level.