METHOD AND COMPLEX UNIT FOR DISPOSAL OF USED AVIATION DE-ICING FLUIDS, CAR ANTI-FREEZING LIQUIDS AND COOLANTS USED IN SPORTS FACILITIES, CONTAINING ETHYLENE GLYCOL, OR PROPYLENE GLYCOL, OR A MIXTURE OF THEM. Russian patent published in 2023 - IPC C09K3/18 C07C29/74 

FIELD: disposal of coolants.

SUBSTANCE: group of inventions relates to a method and a complex unit for disposal of used aviation de-icing fluids, car anti-freezing liquids and coolants used in sports facilities, containing ethylene glycol, or propylene glycol, or a mixture of them. A distinctive feature of the method is that it includes a multi-stage purification of the waste liquid before it is fed into the distillation column, separation of water in the process distillation unit in three stages. Adsorption purification of rectified glycol, designed to purify ethylene glycol, propylene glycol or their mixture from residual impurities and micro-residues of moisture, is carried out on active aluminium oxide, silica gel, aluminosilicate, including synthetic, or zeolite adsorbents after rectification of the glycol solution in a vacuum distillation column K-102 followed by nitrogen-air regeneration of these adsorbents.

EFFECT: production of glycol is ensured.

2 cl, 2 dwg, 10 tbl