Treatment technique of waste water generated in production of o-nitrophenol

A technology for o-nitrophenol and waste water production, which is applied in the fields of water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., which can solve the problem that the treatment effect is not obvious and the salt content is difficult to achieve the expected target. and other problems, to achieve great economic value and practical value, reduce organic pollution, and reduce production costs.

Inactive Publication Date: 2013-02-06
新泰昊原化工有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned waste water was treated by the macroporous resin adsorption device, and sent to the company's sewage treatment station for treatment together with the macroporous resin regeneration and washing waste water. It has achieved a good treatment effect, but because its salt content is still difficult to achieve the expected target, Treatment effect is not obvious

Method used

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  • Treatment technique of waste water generated in production of o-nitrophenol
  • Treatment technique of waste water generated in production of o-nitrophenol

Examples

Experimental program
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Effect test

Embodiment 1

[0030] (1) Wastewater pretreatment: Wastewater enters the wastewater concentration pool for cooling and sedimentation, reaches normal temperature and then enters the baffle tank to remove oil stains. After baffle, the wastewater enters the filter, and the pretreatment process ends;

[0031] (2) The pretreated 20m 3 The waste water enters the XDA-1 resin adsorption column for adsorption. The adsorption column adopts the specification of Φ1000×5200 and contains XDA-1 resin 5m 3 , the adsorption rate is 1BV / h;

[0032] (3) The saturated resin in step (2) is desorbed at a rate of 1BV / h at 30°C using a sodium hydroxide solution with a mass fraction of 10% as a desorbent;

[0033] (4) The high-concentration desorption solution desorbed from step (3) was acidified with 30% hydrochloric acid solution to recover o-nitrophenol, and the low-concentration desorption solution was used for the desorption process, and a total of 50.1 o-nitrophenol was recovered Kg, its recovery rate is 83....

Embodiment 2

[0036](1) Wastewater pretreatment: Wastewater enters the wastewater concentration pool for cooling and sedimentation, reaches normal temperature and then enters the baffle tank to remove oil stains. After baffle, the wastewater enters the filter, and the pretreatment process ends;

[0037] (2) 20m after pretreatment 3 The waste water enters the XDA-1 resin adsorption column for adsorption. The adsorption column adopts the specification of Φ1000×5200 and contains XDA-1 resin 5m 3 , the adsorption rate is 20BV / h;

[0038] (3) Use 1% sodium hydroxide solution as the desorbing agent for the saturated resin in step (2), and desorb at a rate of 20BV / h at 100°C;

[0039] (4) The high-concentration desorption solution desorbed from step (3) was acidified with 20% hydrochloric acid solution to recover o-nitrophenol, and the low-concentration desorption solution was used in the desorption process to recover o-nitrophenol 49.9Kg, the recovery rate is 83.2%;

[0040] (5) The liquid abs...

Embodiment 3

[0042] (1) Wastewater pretreatment: Wastewater enters the wastewater concentration pool for cooling and sedimentation, reaches normal temperature and then enters the baffle tank to remove oil stains. After baffle, the wastewater enters the filter, and the pretreatment process ends;

[0043] (2) 20m after pretreatment 3 The waste water enters the XDA-1 resin adsorption column for adsorption. The adsorption column adopts the specification of Φ1000×5200 and contains XDA-1 resin 5m 3 , the adsorption rate is 12BV / h;

[0044] (3) The saturated resin in step (2) is desorbed at a rate of 15BV / h at 70°C using a sodium hydroxide solution with a mass fraction of 7% as a desorbent;

[0045] (4) The high-concentration desorption solution desorbed from step (3) was acidified with 5% hydrochloric acid solution to recover o-nitrophenol, and the low-concentration desorption solution was used in the desorption process to recover o-nitrophenol 51.8Kg, the recovery rate is 86.3%;

[0046] (5)...

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Abstract

The invention discloses treatment technique of waste water generated in production of o-nitrophenol. The treatment technique comprises the following steps: firstly, pretreating waste water, entering a resin adsorption column for adsorption, desorbing the resin by adopting NaOH solution after the resin adsorption is saturated, adding acid into high-concentration desorption solution for acidizing so as to recover o-nitrophenol, wherein a low-concentration desorption solution sleeve is used for desorption, distilling and purifying the recovered o-nitrophenol, conducting hydrogenation and catalysis to produce o-nitrophenol; carrying out ozone oxidation, neutralization and decoloration on the waste water after being subjected to adsorption treatment, thereby becoming qualified salt water. After the technique is adopted, organic pollution of the waste water to water environment is lightened, the resource utilization can be realized, and the treatment technique has great economic values and practical values in treating the waste water generated in production of o-nitrophenol.

Description

Technical field [0001] The present invention involves a wastewater treatment process, which specifically involves the treatment and utilization of a tangential phenol -salt -containing wastewater. Background technique [0002] Tennitol phenol is an important organic intermediate. It is widely used in industries such as dyes and medicine. It can also be used as analytical reagents. It can be used to make 8-hydroxyl polychin, chloro-sulfenol S, neighbor amino phenol, etc. [0003] There are many reports on the treatment technology of tangamitol phenol production wastewater, such as iron carbon reduction+anaerobic+oxygen consumption, activated carbon suction attachment, magnetic enhancement of sodium hypochlorite oxidation method, sulfum media adsorption method, resin adsorption method, etc.wait.Some are limited to literature reports and laboratory experiments, and some of them are too expensive.The resin adsorption method is better than other methods. This method can not only reduc...

Claims

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Application Information

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IPC IPC(8): C02F9/04
Inventor 袁胜群马洪云贤洲华
Owner 新泰昊原化工有限责任公司
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