Pretreatment method of waste water containing fluoronitrophenol

A nitrophenol pretreatment technology, which is applied in the field of pesticide chemical industry, can solve the problems such as the difficulty of biochemical treatment of fluorine-containing nitrophenol wastewater, and achieve the effects of controllable reaction rate, no risk of explosion, and easy operation

Inactive Publication Date: 2019-05-28
LIER CHEM CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The technical problem solved by the invention is that the biochemical treatment of fluorine-containing nitrophenol wastewater is difficult to realize, and the problem of unsafe concentration and enrichment treatment process is prominent

Method used

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  • Pretreatment method of waste water containing fluoronitrophenol
  • Pretreatment method of waste water containing fluoronitrophenol

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Take 198g of nitrophenol waste water, wherein the content of nitrophenol organic matter is 1.6%, add 2g of sodium hydroxide solid, the alkali concentration is 1%, after stirring and dissolving, put it into a high-temperature and high-pressure reactor, and react at 160°C for 5h , the pressure is 6bar, after the reaction, the waste water is taken out, detected by liquid chromatography, and the content of nitrophenols organic matter is calculated, and the test results are shown in Table 1, wherein "content" refers to the relative HPLC ratio of each nitrophenol in the organic matter contained in waste water. content.

[0035] Table 1

[0036]

Embodiment 2

[0038] Take 196g of nitrophenol waste water, the content of nitrophenol organic matter is 1.6%, add 4g of sodium hydroxide solid, the alkali concentration is 2%, after stirring and dissolving, put it into a high-temperature and high-pressure reactor, and react at 160°C for 5h, The pressure was 6 bar. After the reaction, the waste water was taken out and detected by liquid chromatography to calculate the content of nitrophenol organic matter. The detection results are shown in Table 2.

[0039] Table 2

[0040]

[0041]

Embodiment 3

[0043] Take 196g of nitrophenol wastewater, the content of nitrophenol organic matter is 1.6%, add 4g of sodium hydroxide solid, the alkali concentration is 2%, after stirring and dissolving, put it into a high-temperature and high-pressure reactor, and react at 180°C for 4h, The pressure was 10 bar. After the reaction, the waste water was taken out and detected by liquid chromatography to calculate the content of nitrophenol organic matter. The detection results are shown in Table 3.

[0044] table 3

[0045]

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Abstract

The invention relates to a pretreatment method of waste water containing fluoronitrophenol, and belongs to the pesticide chemical field. The invention aims to solve the technical problems that biochemical treatment of the waste water containing fluoronitrophenol is difficult to realize and unsafety problem of concentration and enrichment process is obvious. The invention discloses the pretreatmentmethod of the waste water containing fluoronitrophenol. The method comprises the steps of firstly adjusting the pH of the waste water, then performing thermal degradation under certain temperature and finally detecting the degraded waste water by liquid chromatogram. According to the pretreatment method of waste water containing fluoronitrophenol, organic matters containing the fluoronitrophenolare thermally degraded into substances that are relatively safe and can be subjected to advanced treatment, the operation is safe and no explosion risk exists.

Description

technical field [0001] The invention belongs to the field of pesticide chemical industry, and in particular relates to a pretreatment method for fluorine-containing nitrophenol wastewater. Background technique [0002] Flufenoxam is a selective herbicide listed by Sumitomo Chemical Industry Co., Ltd. in Japan in 1993. It is mainly aimed at grass weeds and broad-leaved weeds. It is used for weeding of soybeans, sugarcane and cotton. Good, even glyphosate-resistant weeds targeting genetically modified soybeans and cotton have good removal effects, the market prospect is broad, and it may occupy a large share of the herbicide market in the future. [0003] 2.4-Difluoro-dinitrobenzene It is an important intermediate in the synthesis of fluorenzam propargyl. During the synthesis and application of this intermediate, hydrolysis side reactions will occur, resulting in waste water containing nitrophenol. Because nitrophenol is an acute toxic substance and has toxic effects on mos...

Claims

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Application Information

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IPC IPC(8): C02F1/00C02F103/36C02F101/34C02F101/38C02F101/36
Inventor 周波陈曙杨苏军贾涛
Owner LIER CHEM CO LTD
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