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Process for recovering and reusing tribromophenol in bromotriazine production wastewater

A technology of tribromophenol and bromotriazine, which is applied in the field of recovery and reuse of tribromophenol in bromotriazine production wastewater, can solve problems such as workshop odor, large amount of solid waste, etc. The effect of reducing the treatment cost and solving the large amount of solid waste

Pending Publication Date: 2022-07-12
SHANDONG HAIWANG CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the above defects, the purpose of the present invention is to provide a recovery and reuse process of tribromophenol in bromotriazine production wastewater, aiming to solve the technical problems of large amount of tribromophenol solid waste and serious workshop odor in the prior art

Method used

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  • Process for recovering and reusing tribromophenol in bromotriazine production wastewater
  • Process for recovering and reusing tribromophenol in bromotriazine production wastewater

Examples

Experimental program
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Effect test

Embodiment 1

[0023] Get the alkaline waste water 6500kg of tribromophenol, adjust pH to 1~2 with hydrochloric acid, separate out white precipitate tribromophenol;

[0024] Take 60kg of white precipitate, add 300kg of dichloromethane for extraction, let stand for 20min, filter, the organic phase is filtered for later use, and the acidic waste water is discharged into a waste water collection tank;

[0025] The above-mentioned organic phase was transferred into the reactor, 150 kg of sodium sulfite solution was added, the temperature was raised to 37° C., and stirred for 30 min to obtain the recovered tribromophenol, which was used for the preparation of bromotriazine.

[0026] The recovered tribromophenol organic phase and the newly prepared tribromophenol organic phase (reduction ratio 1%) are transferred into the reactor together, add 1000kg deionized water, then add sodium hydroxide solution (according to sodium hydroxide solution and tribromophenol) The weight ratio of the organic phase...

Embodiment 2

[0028] Get the alkaline waste water 6500kg of tribromophenol, adjust pH to 1~2 with hydrochloric acid, separate out white precipitate tribromophenol;

[0029] Take 60kg of white precipitate, add 240kg of dichloromethane for extraction, let stand for 30min, filter, the organic phase is filtered for later use, and the acidic waste water is discharged into a waste water collection tank;

[0030] The above-mentioned organic phase was transferred into the reactor, 330 kg of sodium sulfite solution was added, the temperature was raised to 38° C., and stirred for 30 min to obtain the recovered tribromophenol, which was used for the preparation of bromotriazine.

[0031] The recovered tribromophenol organic phase and the newly produced tribromophenol organic phase (reduction ratio 2%) are transferred into the reactor together, add 1000kg deionized water, then add sodium hydroxide solution (according to sodium hydroxide solution and tribromophenol) The weight ratio of the organic phase...

Embodiment 3

[0033] Get the alkaline waste water 6500kg of tribromophenol, adjust pH to 1~2 with hydrochloric acid, separate out white precipitate tribromophenol;

[0034] Take 60kg of white precipitate, add 200kg of dichloromethane for extraction, let stand for 40min, filter, the organic phase is filtered for later use, and the acidic waste water is discharged into a waste water collection tank;

[0035] The above-mentioned organic phase was transferred into the reaction kettle, 400 kg of sodium sulfite solution was added, the temperature was raised to 38° C., and stirred for 30 min to obtain the recovered tribromophenol, which was used for the preparation of bromotriazine.

[0036] The recovered tribromophenol organic phase and the newly prepared tribromophenol organic phase (reduction ratio 0.03) are transferred into the reactor together, add 1000kg deionized water, and then add sodium hydroxide solution (according to the sodium hydroxide solution and the tribromophenol organic phase). ...

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Abstract

The invention discloses a process for recovering and reusing tribromophenol in bromotriazine production wastewater, and relates to the technical field of chemical wastewater treatment. The method comprises the following steps: adjusting the pH value of alkaline wastewater containing tribromophenol to 1-2 by using hydrochloric acid, and separating out white precipitate tribromophenol; adding dichloromethane for extraction, standing for 20-60 minutes, filtering, filtering an organic phase for later use, and discharging acidic wastewater into a wastewater collection tank; transferring the recovered organic phase into a reaction kettle, adding a sodium sulfite solution, heating, stirring for 30 minutes, and recovering; the method comprises the following steps: adding deionized water and alkali liquor into a recycled tribromophenol organic phase and a newly prepared tribromophenol organic phase, adjusting the pH value, and adding a catalyst and cyanuric chloride to prepare bromotriazine. According to the method, the recovered tribromophenol is used for preparing the bromo-triazine, so that the treatment cost and the peculiar smell of a workshop are reduced, the solid waste in the workshop is reduced, and the solid waste recovery rate is increased.

Description

technical field [0001] The invention relates to the technical field of chemical wastewater treatment, in particular to a recovery and reuse process of tribromophenol in wastewater from bromotriazine production. Background technique [0002] The production wastewater of bromotriazine is a typical organic chemical wastewater, and the water contains by-products such as tribromophenol that has not participated in the reaction and a small amount of materials. According to the "Comprehensive Wastewater Discharge Standard" (GB8978-1996), the drainage of the factory area must meet the first-level standard of sewage discharge units specified in the standard. The main indicators are pH between 6 and 9, COD ≤ 100mg / L, and chlorobenzene content ≤ 0.2 mg / L, suspended solids concentration≤70mg / L. Bromotriazine wastewater has problems such as high COD value, up to 3600mg / L, uneven water discharge, and large water quality fluctuations. It is a chemical organic wastewater that is difficult ...

Claims

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Application Information

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IPC IPC(8): C07C37/72C07C39/27
CPCC07C37/72C07C39/27
Inventor 张晓龙刘军东于兆令冯宝羲朱林生杨新成张婧如张燃辉
Owner SHANDONG HAIWANG CHEM
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