Treatment technology of p-aminotoluene waste water

A technology of p-toluidine and p-nitrotoluene, which is applied in water/sewage treatment, reduced water/sewage treatment, water/sewage multi-stage treatment, etc. Issues such as secondary emission standards

Inactive Publication Date: 2008-06-04
江阴市倪家巷化工有限公司 +1
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Problems solved by technology

[0004] Its production wastewater contains benzene and aniline compounds. According to the characteristics of high toxicity and high concentration of aniline in p-toluidine wastewater, if it is discharged directly without wastewater treatment, it will not meet the national secondary discharge standard and do not meet the national environmental protection requirements.

Method used

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  • Treatment technology of p-aminotoluene waste water
  • Treatment technology of p-aminotoluene waste water

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Embodiment Construction

[0019] The present invention relates to a treatment method for p-toluidine waste water, which is to add formaldehyde to the p-toluidine waste water for polycondensation reaction and to form condensate to precipitate out, and then add polymer flocculant polyacrylamide (PAM) for precipitation, thereby The content of aniline compounds in the wastewater is greatly reduced. Then it is treated with the iron-carbon method, and the effluent from the iron-carbon reaction tower is mixed with other industrial wastewater for aerobic biochemical treatment to meet the national secondary discharge standard. Its specific process steps refer to figure 1 :

[0020] Step 1, polycondensation reaction

[0021] The p-toluidine wastewater is collected into the regulating tank I. Add sulfuric acid (concentration ≤ 50%) into the pool to adjust the pH to 6, and stir with air to make the mixture even. The waste water in the regulating tank I is lifted to the enamel reaction kettle with a pump, and t...

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Abstract

A process for treating the p-methylaniline sewage includes such steps as adding formaldehyde and aluminum sulfate, polycondensation reaction while generating polycondensate, adding high-molecular flocculant polyacrylamide, depositing, treating by Fe-C method, mixing the treated water with other industrial sewages, and areobic biochemical treating.

Description

Technical field: [0001] The invention relates to a method for treating p-toluidine wastewater, which belongs to the technical field of chemical wastewater treatment. technical background: [0002] The production process of p-toluidine is as follows [0003] [0004] Its production wastewater contains benzene and aniline compounds. According to the characteristics of high toxicity and high concentration of aniline in p-toluidine wastewater, if it is discharged directly without wastewater treatment, it will not meet the national secondary discharge standard and do not meet the national environmental protection requirements. . Invention content: [0005] The purpose of the present invention is to provide a kind of treatment method that can reach the p-toluidine waste water of national secondary discharge standard. [0006] The object of the present invention is achieved like this: a kind of treatment method of p-toluidine waste water, it is characterized in that: in p-to...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14C02F1/58C02F1/52C02F1/70C02F3/02
CPCY02W10/10
Inventor 冯晓西魏兴义吴俊锋周益张勤岳吴永阳
Owner 江阴市倪家巷化工有限公司
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