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A device and method for treating high-salt wastewater containing phenol and aniline

A high-salt wastewater treatment method technology, applied in biological treatment devices, chemical instruments and methods, multi-stage water treatment, etc., can solve the problems of device leakage and blockage, high investment, strong corrosion of equipment, etc., and achieve oil-water separation interface Clear, low one-time investment and low operating costs

Active Publication Date: 2022-05-17
DESIGN ENG OF SYRICI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The waste water produced by 2,6-dichlorotoluene has high salt content, and the investment of evaporation concentration and catalytic wet oxidation process is high, and the equipment is highly corrosive, which can easily cause leakage and blockage of the device, which is not conducive to industrial operation
The resin adsorption process is directly used, and the maximum adsorption capacity is quickly reached, which increases the operating cost and produces too much concentrated liquid, causing secondary pollution. It can be seen that the existing process cannot solve the industrialization of high-concentration and high-salt wastewater produced by 2,6-dichlorotoluene Problems with stable operation

Method used

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  • A device and method for treating high-salt wastewater containing phenol and aniline
  • A device and method for treating high-salt wastewater containing phenol and aniline

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Such as figure 1 As shown, the device includes an extraction pretreatment unit, a resin adsorption unit and a high-salt biochemical system unit, wherein the extraction pretreatment unit includes No. 1 extraction kettle 1, No. 1 separation tank 4, No. 2 extraction kettle 7 and No. 2 separation tank 10, The resin adsorption unit includes a resin adsorption column device 12, and the high-salt biochemical system unit includes a high-salt biochemical device 13, packing 14, and aeration 15; the No. 1 extraction tank 1, No. 1 separation tank 4, and No. 2 extraction tank Kettle 7 and No. 2 separation tank 10, resin adsorption column device 12, and high-salt biochemical device 13 are connected in sequence through pipelines; the pipeline of No. 1 extraction kettle 1 is connected with the middle part of No. 1 separation tank 4, and the pipeline of No. 2 extraction kettle 7 It is connected with the middle part of No. 2 separation tank 10.

[0048] The primary extraction includes N...

Embodiment 2

[0058] The wastewater is taken from the regulating tank of a fine chemical production plant in Shandong. According to the staged production characteristics of the factory, the quality of the wastewater in the regulating tank will fluctuate to a certain extent over time. The 2,6-dichlorotoluene replaced the wastewater. The wastewater manufacturer had removed the copper ions in the wastewater by ion exchange process. The pH value was 4-5, TOC 3122mg / L, phenol 1630mg / L, aniline 1261mg / L, salt The concentration is 78056mg / L.

[0059] The preparation of extractant 1: based on the total weight percentage of extractant 1, 10% of tetradecylamine, 15% of isomeric 22 alcohol, and the balance is aviation kerosene; the preparation of extractant 2: based on the total weight percentage of extractant 2 , 15% of P204, 15% of isomerized 20 alcohol, and the balance is aviation kerosene.

[0060] The above treatment process,

[0061] (1) Extraction pretreatment unit:

[0062] ① Put the waste ...

Embodiment 3

[0075] The wastewater is taken from the regulating tank of a fine chemical production plant in Shandong. According to the staged production characteristics of the factory, the quality of the wastewater in the regulating tank will fluctuate to a certain extent over time. The 2,6-dichlorotoluene replaced the wastewater. The wastewater manufacturer had removed the copper ions in the wastewater by ion exchange process, the pH value was 4-5, TOC 2764mg / L, phenol 1430mg / L, aniline 1031mg / L, salt The concentration is 73220mg / L.

[0076] The preparation of extractant 1: based on the total weight percentage of extractant 1, 10% of tetradecylamine, 15% of isomeric 22 alcohol, and the balance is aviation kerosene; the preparation of extractant 2: based on the total weight percentage of extractant 2 , 15% of P204, 15% of isomerized 20 alcohol, and the balance is aviation kerosene.

[0077] The above treatment process,

[0078] (1) Extraction pretreatment unit:

[0079] ① Put the waste ...

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Abstract

The invention belongs to the technical field of fine chemical wastewater treatment, and in particular relates to a device for treating high-salt wastewater containing phenol and aniline (fine chemical wastewater such as high-salt phenol and aniline produced in the production process of 2,6-dichlorotoluene products) and processing methods. The device is used to separate the pollutants phenol and aniline in the wastewater by means of continuous extraction. After the extraction, the wastewater is then adsorbed by resin, so that the treated wastewater TOC is less than 350mg / L and then undergoes high-salt biochemical treatment, which realizes the purification of wastewater. For the treatment, the phenol and aniline in the wastewater are separated by two-stage continuous extraction, and the characteristic pollutants phenol and aniline are separated at the same time, and made into resources. The invention has the characteristics of industrial feasibility, continuous operation, reasonable design of device structure, and remarkable treatment effect. , Aniline resources.

Description

technical field [0001] The invention belongs to the technical field of fine chemical wastewater treatment, and specifically relates to a device for treating high-salt wastewater containing phenol and aniline (fine chemical wastewater such as high-salt phenol and aniline produced in the production process of 2,6-dichlorotoluene) and methods. Background technique [0002] 2,6-Dichlorotoluene is an important chemical intermediate, widely used in synthetic dyes, antibiotic substitutes, insecticides, fungicides and herbicides, etc., and its synthesis routes mainly include o-nitrotoluene method, p-nitrotoluene method Base toluene method, p-toluenesulfonyl chloride method, o-toluenesulfonyl chloride method, toluene direct chlorination method, p-tert-butyltoluene method, o-chlorotoluene method. Among them, the o-nitrotoluene method has a classic reaction and mature technology, and has been adopted by relevant manufacturers. [0003] The o-nitrotoluene method uses o-nitrotoluene as...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14C02F101/34C02F101/38
CPCC02F9/00C02F1/26C02F1/28C02F3/34C02F2301/08C02F2203/006C02F2209/20C02F2303/16C02F2101/345C02F2101/38
Inventor 宋红董振海孙宇明宇秉勇
Owner DESIGN ENG OF SYRICI
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