FIELD: chemistry.
SUBSTANCE: invention relates to water treatment. Sodium nitrite and hydrochloric acid are added to methanol-containing waste water while stirring. The formed methyl nitrite is taken for absorption. The saturated absorbent solution is fed into a fractionation column for regenerating methanol. The distillation residue after regenerating methanol is neutralised and fed to the beginning of the waste water treatment process.
EFFECT: invention provides fine purification of waste water from methanol to the maximum allowable concentration level, enables to regenerate methanol and reduces consumption of reactants.
1 tbl, 10 ex
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD OF OBTAINING OXALATE BY CARBON MONOXIDE GAS PHASE METHOD | 2011 |
|
RU2532348C2 |
| METHOD FOR PURIFICATION OF SODIUM CHLORIDE | 1992 |
|
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| METHOD FOR REAGENT RECOVERY OF LIQUID SALT NITRITE-NITRATE HEAT CARRIER | 2013 |
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| METHOD OF DECONTAMINATION OF SEWAGE CONTAINING AROMATIC AMINES | 1998 |
|
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| METHOD FOR PRODUCING LITHIUM METAL AND INSTALLATION FOR ITS IMPLEMENTATION | 2020 |
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| METHOD OF SPENT ALKALINE GALVANIC COPPER PLATING ELECTROLYTE REGENERATING | 2015 |
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| METHANOL PROCESSING METHOD IN THE PROCESS OF PRODUCING DIMETHYL OXALATE BY GAS SYNTHESIS | 2015 |
|
RU2689569C2 |
| METHOD OF QUANTITATIVE DETERMINING OF METHANOL | 0 |
|
SU723451A1 |
| DIMETHYL OXALATE PRODUCTION METHOD | 2015 |
|
RU2692099C2 |
| METHOD OF PREPARING NITRITE-NITRATE SALTS | 2006 |
|
RU2314256C1 |
