Treatment method of pyrazole pesticide production wastewater
The invention discloses a treatment method of pyrazole pesticide production wastewater. The method comprises: adjusting the pH value of pyrazole pesticide production wastewater to 5-7 so as todissociatethe pyrazole pesticide production wastewater from the wastewater; enabling the wastewater subjecte...
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Format: | Patent |
Sprache: | chi ; eng |
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Zusammenfassung: | The invention discloses a treatment method of pyrazole pesticide production wastewater. The method comprises: adjusting the pH value of pyrazole pesticide production wastewater to 5-7 so as todissociatethe pyrazole pesticide production wastewater from the wastewater; enabling the wastewater subjected to pH regulation to pass through a resin column, and adsorbing pyrazole compounds in the wastewater; and desorbing the resin column by adopting an ethanol water solution, recovering ethanol from the eluent, and cooling and crystallizing the residual eluent to obtain the pyrazole compound; and concentrating the residual wastewater passing through the resin column, cooling and crystallizing to obtain inorganic salt. According to the present invention, according to the characteristic that the pyrazole compound contains the hydrophobic group of = N-NH-, the pH value of the wastewater is adjusted so as to dissociate the pyrazole compound from the wastewater, and then the specific styrene macroporous adsorption resin i |
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