Method for reducing content of volatile phenol in o-ethoxyphenol production wastewater

A technology of o-ethoxyphenol and ethoxyphenol, which is applied in the field of industrial wastewater treatment, can solve the problems of high COD content, poor biochemical treatment effect, high volatile phenol content, etc., and achieve high removal rate

Inactive Publication Date: 2018-10-16
CHONGQING THRIVE CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this process produces more wastewater, high volatile phenol content, high COD content, and poor biochemical treatment effect

Method used

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  • Method for reducing content of volatile phenol in o-ethoxyphenol production wastewater

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Effect test

Embodiment 1

[0015] Embodiment 1 of the present invention: a method for reducing volatile phenol content in o-ethoxyphenol production wastewater, comprising the following steps:

[0016] S100: aerating the o-ethoxyphenol production wastewater through an aeration device;

[0017] S200: adding sulfuric acid solution to the waste water from the production of o-ethoxyphenol to adjust the pH value to 2; in the step S200, the concentration of the sulfuric acid solution is 50%, and the micro-aeration time is 10 hours. Its purpose is to precipitate tar, which can only be precipitated in a large amount in an acidic environment; the purpose of aeration is to mix evenly. Removing tar also achieves the effect of reducing COD and volatile phenols.

[0018] S300: Adjust the aeration valve of the aeration device, and perform micro-aeration for 8 hours; wherein, the functions of step S200 and step S300 are to remove tar on the surface, mainly substances with higher boiling points. The main purpose is to...

Embodiment 2

[0024] Embodiment 2: a kind of method that reduces volatile phenol content in the production waste water of o-ethoxyphenol, comprises the following steps:

[0025] S100: aerating the o-ethoxyphenol production wastewater through an aeration device;

[0026] S200: adding sulfuric acid solution to the waste water from o-ethoxyphenol production to adjust the pH value to 4; the concentration of the sulfuric acid solution in the step S200 is 50%, and the micro-aeration time is 10 hours.

[0027] S300: Adjust the aeration valve of the aeration device, and perform micro-aeration for 10 hours; wherein, the function of step S200 and step S300 is to remove tar on the surface, mainly substances with higher boiling points. The main purpose is to remove tar, which otherwise affects the post-processing effect.

[0028] S400: Add 1% oxidant by weight to the o-ethoxyphenol production wastewater; add sulfuric acid solution to the o-ethoxyphenol production wastewater to adjust the pH value to 4...

Embodiment 3

[0033] Embodiment 3: a kind of method that reduces volatile phenol content in the production waste water of o-ethoxyphenol, comprises the following steps:

[0034] S100: aerating the o-ethoxyphenol production wastewater through an aeration device;

[0035] S200: adding sulfuric acid solution to the waste water from o-ethoxyphenol production to adjust the pH value to 3; in the step S200, the concentration of the sulfuric acid solution is 50%, and the micro-aeration time is 10 hours.

[0036] S300: Adjust the aeration valve of the aeration device, and perform micro-aeration for 9 hours; wherein, the function of step S200 and step S300 is to remove tar on the surface, mainly substances with higher boiling points. The main purpose is to remove tar, which otherwise affects the post-processing effect.

[0037] S400: Add 0.7% oxidant by weight to the o-ethoxyphenol production wastewater; add sulfuric acid solution to the o-ethoxyphenol production wastewater to adjust the pH value to...

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Abstract

The invention discloses a method for reducing the content of volatile phenol in o-ethoxyphenol production wastewater. The method comprises the following steps: S100, performing air blowing on the o-ethoxyphenol production wastewater through an aeration device; S200, adding a sulfuric acid solution into the o-ethoxyphenol production wastewater and adjusting the PH value to 2 to 4; S300: adjusting an aeration valve of the aeration device and carrying out micro-aeration for 8 to10 hours; S400: adding 0.1 to 1 weight percent of oxidant into the o-ethoxyphenol production wastewater; S500, aeratingthe o-ethoxyphenol production wastewater through the aeration device for 5 to 10 minutes; S600, standing the o-ethoxyphenol production wastewater for 3 to 4 hours; S700, aerating the o-ethoxyphenol production wastewater through the aeration device for 6 to 10 hours and adding 2 to 7 weight percent of activated carbon into the wastewater in the aeration process. The method disclosed by the invention has the advantages of easily-obtained raw materials, simple and easily-controlled technological process, high removal rate of the volatile phenol and easiness in realizing large-scale treatment of the wastewater.

Description

technical field [0001] The invention relates to a method for reducing volatile phenol content in o-ethoxyphenol production wastewater, belonging to the technical field of industrial wastewater treatment. Background technique [0002] o-Ethoxyphenol (o-Ethoxyphenol), is a colorless to light yellow transparent liquid, used as a raw material for spices, used for the synthesis of ethyl vanillin and eugenol, the spices are used in food, cosmetics, and also used as Raw materials for synthetic medicine. [0003] The main synthesis methods of o-ethoxyphenol are o-aminophenethyl ether method and catechol method. Among them, the catechol and ethyl chloride method in the catechol method is that catechol and ethyl chloride are subjected to O-ethylation reaction under the action of a phase transfer catalyst, and then the finished product is obtained by extraction and vacuum distillation. o-Ethoxyphenol. The method has high product yield, low cost and short process. At present, it has...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F101/34C02F103/36
CPCC02F1/283C02F1/40C02F1/66C02F1/722C02F9/00C02F2101/345C02F2103/36
Inventor 兰军赵华文唐凌任杰
Owner CHONGQING THRIVE CHEM
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