METHOD AND SYSTEM FOR PROCESSING FOR SECONDARY USE OF SPENT ETHYLENE GLYCOL FROM REGENERATED ANTI-ICING SOLUTIONS FOR AIRCRAFT Russian patent published in 2019 - IPC C07C29/76 C07C31/20 C09K3/18 

FIELD: technological processes.

SUBSTANCE: invention relates to a method and system for processing for secondary use of spent ethylene glycol or propylene glycol extracted from anti-icing solutions for aircraft. Regenerated spent ethylene glycol or propylene glycol contains water and other undesirable substances to be removed in order to obtain a solution, which does not contain said substances, which can be further processed to remove all contained water, and is mixed with additives required to certify a final solution of glycol to eliminate icing of aircraft. Method and system use a computer controller for continuous automatic portion treatment of spent glycol, including, in combination, filtration, distillation, mixing and testing in certain sequences.

EFFECT: improved quality of recycled glycol with purity of at least 99,5 % and preferably between 99,6 % and 99,9 % with respect to glycol concentration.

14 cl, 3 dwg