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 r

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

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Example Embodiment

[0029] Example 1

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

[0031] (2) The 20m after pretreatment 3 The wastewater enters the XDA-1 resin adsorption column for adsorption, the adsorption column adopts Φ1000×5200 specifications, and the XDA-1 resin is 5m inside. 3 , The adsorption rate is 1BV / h;

[0032] (3) Use 10% sodium hydroxide solution as a desorption agent for the resin after the adsorption is saturated in step (2), and desorb at a rate of 1BV / h at 30°C;

[0033] (4) The high-concentration desorption solution desorbed from step (3) is acidified with a 30% hydrochloric acid solution to recover o-nitrophenol. The low-concentration desorption solution is used in the desorption process to recover 50.1 o-nitrophenol. Kg, the recovery rate is 83.5%;

[...

Example Embodiment

[0035] Example 2

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

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

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

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

Example Embodiment

[0041] Example 3

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

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

[0044] (3) Use 7% sodium hydroxide solution as the desorption agent for the resin after adsorption saturation in step (2), and desorb at a rate of 15 BV / h at 70°C;

[0045] (4) The high-concentration desorption solution desorbed from step (3) is acidified with a 5% hydrochloric acid solution to recover o-nitrophenol. The low-concentration desorption solution is 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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