Process for regenerating used deicing agent for planes based on glycol.

摘要

According to the method described, the used aircraft deicing fluid is first subjected to conventional filtration for separating off undissolved substances and then to an ultrafiltration for separating off, in particular, polymeric thickeners. The ultrafiltration permeate is further treated with ionic exchangers and water is then separated off by distillation from the eluate obtained essentially comprising glycol and water and thus the glycol level is brought to the desired value. A new aircraft deicing composition can be prepared with the glycol/water solution thus obtained by adding the additional necessary components to the glycol/water solution.