Waste water treatment process in sebacic acid production

A wastewater treatment and sebacic acid technology, which is applied in natural water treatment, extracted water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problems of small adsorption capacity of sulfonated coal, difficulty in regeneration of activated carbon, and short practical cycle of resin and other problems, to achieve the effect of short equilibrium time, rapid stratification, and avoiding secondary pollution

Inactive Publication Date: 2012-10-24
HEBEI CASDA BIOMATERIALS
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Problems solved by technology

Although these methods can effectively remove phenol, they also have their disadvantages: the regeneration of activated carbon is difficult, and the working en

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  • Waste water treatment process in sebacic acid production

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Effect test

Embodiment 1

[0031] The phenol-containing wastewater produced by sebacic acid and 2-octanol flow countercurrently into the extraction tank at the same time. The effective mass percentage of secondary octanol and phenol-containing wastewater is 1:10, three-stage countercurrent extraction, and the extraction temperature is 70°C. Before extraction, the phenolic value of secondary octanol was less than 10ppm, and the phenolic value of wastewater was about 4000ppm; after extraction, the phenolic value of secondary octanol increased to nearly 40000ppm, and the phenolic value of phenolic wastewater decreased to about 5ppm.

[0032] After extraction, the secondary octanol enters the stripping process for phenol recovery. The phenol-containing secondary octanol and the lye sodium hydroxide enter the extraction tank countercurrently at the same time, the concentration of the sodium hydroxide solution is 10%, and the molar ratio of the phenol content in the phenol-containing 2-octanol to the effectiv...

Embodiment 2

[0034] The phenol-containing wastewater produced by sebacic acid and 2-octanol flow countercurrently into the extraction tank at the same time. The effective mass percentage of secondary octanol and phenol-containing wastewater is 1:8, three-stage countercurrent extraction, and the extraction temperature is 80°C. Before extraction, the phenolic value of secondary octanol was less than 10ppm, and the phenolic value of wastewater was about 5000ppm; after extraction, the phenolic value of secondary octanol increased to nearly 50000ppm, and the phenolic value of phenolic wastewater decreased to about 5ppm.

[0035] After extraction, the secondary octanol enters the stripping process for phenol recovery. The phenol-containing secondary octanol and the lye sodium hydroxide enter the extraction tank countercurrently at the same time, the concentration of the sodium hydroxide solution is 20%, and the molar ratio of the phenol content in the phenol-containing 2-octanol to the effective...

Embodiment 3

[0037]The phenol-containing wastewater produced by sebacic acid and 2-octanol flow countercurrently into the extraction tank at the same time. The effective mass percentage of secondary octanol and phenol-containing wastewater is 1:6, three-stage countercurrent extraction, and the extraction temperature is 60°C. Before extraction, the phenolic value of secondary octanol was less than 10ppm, and the phenolic value of wastewater was about 5000ppm; after extraction, the phenolic value of secondary octanol increased to nearly 60000ppm, and the phenolic value of phenolic wastewater decreased to about 5ppm.

[0038] After extraction, the secondary octanol enters the stripping process for phenol recovery. The phenol-containing secondary octanol and the lye sodium hydroxide enter the extraction tank countercurrently at the same time, the concentration of the sodium hydroxide solution is 30%, and the molar ratio of the phenol content in the phenol-containing 2-octanol to the effective ...

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Abstract

The invention relates to a waste water treatment process in sebacic acid production. The process comprises the following steps: adopting an extractant to extract phenol in waste water, separating the phenol-containing extracted solution and a raffinate, carrying out dephenolizing and reutilizing on the phenol-containing extracted solution, and discharging the raffinate, wherein DL-2-octanol is adopted as the extractant to extract the phenol-containing waste water in sebacic acid production in the extraction process. The process of the present invention has the following advantages that: 1, the phenol content in the sebacic acid production waste water is significantly reduced, and the waste water after the extraction can meet the discharge standard; 2, with the extractant DL-2-octanol, an internal circulation of the production system is realized; and 3, the DL-2-octanol is the by-product of the sebacic acid production process, such that advantages of easily available DL-2-octanol, low cost and low operation cost are provided for sebacic acid production enterprises.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and relates to a sewage treatment process, in particular to a process for treating waste water in sebacic acid production. Background technique [0002] Sebacic acid is an important chemical raw material with broad application prospects. It is widely used in the manufacture of cold-resistant plasticizers, the production of high-quality engineering plastics such as nylon, and spices. At present, in the production process of sebacic acid, the amount of wastewater generated in each cycle is as high as 25-30m 3 , The content of phenol in wastewater is about 4000-5000ppm. Phenolic compounds are a kind of protoplasmic poisons, which can produce toxicity when in contact with biologically active substances. Wastewater containing phenols not only poses a serious threat to human health, but also harms animals and plants. Therefore, phenols are currently prohibited by national orders. With the im...

Claims

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Application Information

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IPC IPC(8): C02F1/26C02F103/36
Inventor 段洪良马士丰邢文兰张瑞超
Owner HEBEI CASDA BIOMATERIALS
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