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Treatment of phenol containing decanedioic acid waste water by extractive distillation

A technology of extractive distillation and phenolic wastewater, applied in water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve the problems that cannot be popularized and applied, low distribution coefficient, and cannot be recycled

Inactive Publication Date: 2003-10-22
HAIHUA TIANHE ORGANIC CHEM SHANDONG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Commonly used are ricinoleic acid extraction method and complex extraction method, but due to the low distribution coefficient of ricinoleic acid extraction phenol, the effect is poor, the dissolution loss in water is large, and the content of phenol in the treated wastewater is as high as 200PPM, which is not up to the standard; complexation The extraction method has a large amount of organic matter dissolved in sebacic acid-containing phenolic wastewater, and saponification occurs in the back extraction, the extraction cannot be recycled, and the operating cost is high, so it cannot be popularized and applied

Method used

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  • Treatment of phenol containing decanedioic acid waste water by extractive distillation
  • Treatment of phenol containing decanedioic acid waste water by extractive distillation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Extractive distillation method of the present invention handles sebacic acid containing phenolic waste water and comprises the following steps:

[0016] 1. Adjustment. Due to the different discharge rules and water quality of the workshop wastewater, in order to ensure that the follow-up treatment process can operate under a relatively stable working condition to obtain a higher removal rate, the phenol-containing wastewater from the sebacic acid workshop first enters the regulating storage tank. Stay in the tank for a period of time to facilitate the balance of water quality and water quantity and prepare for subsequent treatment. Of course, this step can also be omitted if the water quality and water quantity of the wastewater are relatively balanced, or other forms of regulation have been obtained.

[0017] 2. Filter. The settled wastewater contains solid impurities. Under normal temperature and pressure of 0.2-0.35Mpa, it is filtered by a plate and frame filter pr...

Embodiment 2

[0022] The process of adjustment, filtration and oil separation is the same as in Example 1.

[0023] 3. Extraction. The filtered wastewater is pumped into the first extraction zone. In the first extraction zone, high-carbon alcohol (C8) is used as the extractant to countercurrently extract the phenol-containing wastewater. The volume ratio of the extractant to the phenol-containing wastewater is 1:40. The temperature is 30°C; the raffinate is sent to the second extraction zone, where the mixture of organic phosphate and kerosene is used as the extractant to extract countercurrently with the raffinate in the first extraction zone, and the extractant is mixed with the phenolic wastewater The volume ratio is 1:40, the temperature is 30° C., and the weight content of phosphate in the extractant is 20%. The raffinate is put into the grease trap, and discharged up to the standard after deoiling. The extracts from the two extraction zones enter the dephenolization process.

[002...

Embodiment 3

[0026] The process of adjustment, filtration and oil separation is the same as in Example 1.

[0027] 3. Extraction. The filtered wastewater is pumped into the first extraction zone. In the first extraction zone, high-carbon alcohol (C10) is used as the extractant to countercurrently extract the phenol-containing wastewater. The volume ratio of the extractant to the phenol-containing wastewater is 1:50. The temperature is 45°C; the raffinate is sent to the second extraction zone, and in the second extraction zone, a mixture of organic phosphate and kerosene is used as the extractant to countercurrently extract the raffinate in the first extraction zone, and the extractant is mixed with the phenol-containing wastewater The volume ratio is 1:50, the temperature is 45° C., and the weight content of phosphate in the extractant is 50%. The raffinate is put into the grease trap, and discharged up to the standard after deoiling. The extracts from the two extraction zones enter the ...

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Abstract

The method for treating waste water containing phenol which is produced in the course of producing sebacic acid includes five steps: regulation, filtration, extraction, removing phenol and isolating oil. After the phenol-containing waste water is filtered and its insoluble material is removed, in first extraction zone the high carbon alcohol is used as extraction agent to remove the organic material from waste water and effectively reduce content of phenol, the load extraction agent is fed into distillation procedure, the distilled high carbon alcohol can be reextracted and can be circularly used, and the organic material being in the waste water can be recovered in the form of high-boiling material, and the second extraction zone the mixture of phosphate and kerosene is used as extraction agent to make counter-current extraction with the phenol-containing waster water.

Description

technical field [0001] The invention relates to a method for treating waste water, in particular to a method for treating phenol-containing waste water produced in the process of producing sebacic acid. technical background [0002] In the production process of sebacic acid, due to the needs of the production process, phenol needs to be added as a diluent and catalyst, and a certain amount of phenol-containing wastewater is discharged every day. The sebacic acid manufacturers all over the country have no good way. Commonly used are ricinoleic acid extraction method and complex extraction method, but due to the low distribution coefficient of ricinoleic acid extraction phenol, the effect is poor, the dissolution loss in water is large, and the content of phenol in the treated wastewater is as high as 200PPM, which is not up to the standard; complexation In the extraction method, since a large amount of organic matter is dissolved in sebacic acid-containi...

Claims

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Application Information

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IPC IPC(8): C02F9/02C02F9/04
Inventor 秦国栋李国泰郭焕美陈福章岳跃山陈光亮秦英军
Owner HAIHUA TIANHE ORGANIC CHEM SHANDONG
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