FIELD: special-destination fluids.
SUBSTANCE: improved method of refining and isolating water-glycol solution from exhausted antifreezes for preparing cooling fluids and low-freezing heat carriers comprising addition of coagulant followed by filtration on sand filter and refining on activated carbon, is characterized by that, after addition of coagulant, additional separator-assistant centrifugation stage is included and coagulant is selected from alkali metal hydroxide, 75% orthophosphoric acid, alkali metal carbonate, and sodium sulfate with following proportions of components utilized, wt %: sodium or potassium hydroxide 0.01-1.0, 75% orthophosphoric acid 0.02-1.6, sodium or potassium carbonate 0.05-0.5, sodium sulfate 0.01-0.07, glycols 40.0-90.0, water and oxidation products - the balance.
EFFECT: increased degree of purification to 100% regarding suspended impurities and to 95-100% regarding chief part of ethylene glycol oxidation products and corrosion products.
3 tbl, 11 ex
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD OF PURIFYING ANTIFREEZE BASED ON WATER-ETHYLENE GLYCOL SOLUTION TO REMOVE ETHYLENE GLYCOL OXIDATION PRODUCTS, CORROSION PRODUCTS, AND SUSPENDED IMPURITIES | 2002 |
|
RU2221766C1 |
| RECOVERY OF USED DEICING FLUIDS | 2014 |
|
RU2583259C2 |
| 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. | 2021 |
|
RU2794335C2 |
| ANTIFREEZE | 2001 |
|
RU2206592C1 |
| CORROSION INHIBITOR FOR ANTIFREEZES | 1997 |
|
RU2125074C1 |
| COOLING FLUID | 2001 |
|
RU2213119C2 |
| FORMULATION OF CAR COOLING AGENT COMPATIBLE WITH OTHER COOLING AGENTS | 2019 |
|
RU2748915C2 |
| ANTIFREEZE | 2008 |
|
RU2356928C1 |
| ANTIFREEZE | 1999 |
|
RU2156787C1 |
| ANTIFREEZE | 1995 |
|
RU2103310C1 |
