Treatment method of waste water from industrial production of triazinone
A treatment method and technology of triazinone, applied in the treatment field of triazinone industrial production wastewater, can solve the problems such as the separate separation, recycling and reuse of pivalic acid that are not paid attention to
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Embodiment 1
[0033] Add 1000g of triazone waste water into a three-necked flask, add 50g of toluene at 25°C, stir for half an hour, let it stand for half an hour, separate the liquid, and separate the toluene layer; then repeat the extraction of the water layer once in the same way; The extracted toluene layers were combined.
[0034] The pH of the aqueous layer was adjusted to neutral with liquid caustic soda, and distilled under reduced pressure. Recover 800g of water, of which COD: 700mg / L; ammonia nitrogen: 55mg / L. Recover industrial wet salt 150g.
[0035] The toluene layer was distilled under reduced pressure at 55°C, 95 g of toluene was recovered by condensation, and 9.0 g of the residue in the kettle contained 8.87 g of pivalic acid. Therefore, the recovery rate of pivalic acid was 88.7%, and the recovery rate of toluene was 95%.
Embodiment 2
[0037] Add 1000g of triazone wastewater into a three-necked flask, add 50g of toluene at 25°C, stir for half an hour, let it stand for half an hour, separate the liquid, separate the toluene layer, and repeat the extraction of the water layer 4 times in the same way; The toluene layers were combined.
[0038] The pH of the aqueous layer was adjusted to neutral with liquid caustic soda, and distilled under reduced pressure. Recover 800g of water, of which COD: 537mg / L; ammonia nitrogen: 43mg / L. Reclaim industrial wet salt 155g.
[0039] The toluene layer was distilled under reduced pressure at 55°C, 235 g of toluene was recovered by condensation, and 9.3 g of the residue in the kettle contained 9.07 g of pivalic acid. Therefore, the recovery rate of pivalic acid was 90.7%, and the recovery rate of toluene was 94%.
Embodiment 3
[0041] Add 1000g of triazone wastewater into a three-necked flask, add 50g of toluene at 30°C, stir for half an hour, let it stand for half an hour, separate the liquid, separate the toluene layer, then repeat the extraction of the water layer once in the same way, and extract twice The toluene layers were combined.
[0042] The pH of the aqueous layer was adjusted to neutral with liquid caustic soda, and distilled under reduced pressure. Recover 820g of water, of which COD: 741mg / L; ammonia nitrogen: 85mg / L. Recover industrial wet salt 152g.
[0043] The toluene layer was distilled under reduced pressure at 55°C, 96 g of toluene was recovered by condensation, and 8.9 g of the residue in the kettle contained 8.73 g of pivalic acid. Therefore, the recovery rate of pivalic acid was 87.3%, and the recovery rate of toluene was 96%.
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Abstract
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