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Combined process of treating high concentration and high colority effluent from acetaminophen production

A paracetamol and combined process technology, which is applied in chemical instruments and methods, heating water/sewage treatment, neutralized water/sewage treatment, etc. , can not meet environmental protection requirements and other issues, to achieve the effect of easy promotion, stable chromaticity, and improved biodegradability

Inactive Publication Date: 2006-12-06
杨云军 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But above-mentioned two kinds of methods are all small-scale test results, in fact their technological route realizes the popularization and application of industrialization and finds that the chromaticity of the treated paracetamol wastewater is unstable, and the color is continuously deepened along with the prolongation of standing time, and in alkaline Under certain conditions, it shows a darker pure blue color, and cannot guarantee that the chromaticity and volatile phenol indicators will meet the emission standards, and cannot meet the increasing environmental protection requirements.

Method used

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  • Combined process of treating high concentration and high colority effluent from acetaminophen production

Examples

Experimental program
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Effect test

Embodiment 1

[0034] 20 tons of paracetamol wastewater with high concentration and high chroma is pumped into the oxidation tank, 80 kg of 10% ferrous sulfate solution and 10% manganese sulfate solution are added respectively, and steam is introduced into the oxidation tank to raise the temperature of the wastewater to 98°C. Turn on the aeration device for aeration and oxidation, and at the same time turn on the hydrogen peroxide metering pump to evenly add 222 kg of 30% hydrogen peroxide solution to the oxidation device, and control the addition time for 4 hours. , add 82.5 kg of 30% sodium hydroxide solution, adjust the pH value to 6.8, pump the wastewater into the coagulation decolorization reaction tank, and add 20% polyaluminum chloride solution to the coagulation decolorization reaction tank when the wastewater temperature is 60°C 40 kg, 40 kg of 0.2% polyacrylamide solution, 40 kg of 20% macromolecule flocculation decolorization agent solution, 100 kg of powdered activated carbon, and...

Embodiment 2

[0039] A total of 20 tons of high-concentration, high-color paracetamol wastewater and part of the cooling water are pumped into the oxidation tank, and 40 kg of 10% ferrous sulfate solution and 10% manganese sulfate solution are added respectively, and steam is passed into the oxidation tank to decompose the wastewater. Raise the temperature to 80°C, turn on the aeration device to aerate and oxidize, and at the same time turn on the hydrogen peroxide metering pump to evenly add 12.3 kg of 30% hydrogen peroxide into the oxidation tank, control the adding time for 3 hours, and continue to maintain the temperature of 100°C after the oxidant is added. Oxidation for 6 hours, after that, add 18 kg of 30% sodium hydroxide solution, adjust the pH value to 6.3, pump the waste water into the coagulation decolorization reaction tank, and add 20 50 kg of % polyaluminum chloride solution, 50 kg of 0.2% polyacrylamide solution, 50 kg of 20% macromolecule flocculation and decolorization agen...

Embodiment 3

[0044] 20 tons of paracetamol wastewater with high concentration and high chroma is pumped into the oxidation tank, 100 kg each of 10% ferrous sulfate solution and 10% manganese sulfate solution are added, and steam is introduced into the oxidation tank to raise the temperature of the wastewater to 80°C. Turn on the aeration device for aeration and oxidation, and at the same time turn on the hydrogen peroxide metering pump to evenly add 155 kg of 30% hydrogen peroxide to the oxidation device, and control the addition time for 5 hours. , add 70 kg of 30% sodium hydroxide solution, adjust the pH value to 6.6, pump the wastewater into the coagulation decolorization reaction tank, and add 20% polyaluminum chloride solution to the coagulation decolorization reaction tank when the wastewater temperature is 50°C 100 kg, 100 kg of 0.2% polyacrylamide solution, 100 kg of 20% macromolecule flocculation and decolorization agent solution, 120 kg of powdered activated carbon, stirred with a...

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Abstract

The combined process of treating high concentration and high colority effluent from acetaminophen production includes the steps of pumping the effluent into oxidizing reaction pond, adding catalyst, heating, air aeration and oxidant treatment, coagulation and decoloring. The present invention solves the difficult problem of treating effluent from production of p-aminophenol material, and the treating process has effluent colority eliminating rate not lower than 99.9 %, water colority index lowering of 10 times and volatile phenol index lower than 1.0 mg / L, and is favorable to post biochemical treatment. The present invention may be industrial used.

Description

Technical field: [0001] The invention relates to a waste water treatment technology, which is used in the pharmaceutical industry to process high-concentration and high-color process waste water produced during the production of paracetamol. Background technique: [0002] At present, there are many methods for treating industrial wastewater, but there are few methods that can effectively treat paracetamol wastewater. The chemical name of paracetamol is paracetamol, which is synthesized in one step from p-aminophenol and acetic acid. The process wastewater mainly contains acetic acid, p-aminophenol, p-acetaminophenol and their oxidation intermediates. Since p-aminophenol and p-acetaminophen are easily oxidized, high-color oxidation intermediates are formed, and the properties of the oxidation intermediates are extremely It is unstable and can continue to oxidize, causing the color to deepen continuously and show different colors under different pH values. Therefore, the main...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/04C02F1/74C02F1/66C02F1/52C02F1/02C02F1/72
Inventor 杨云军
Owner 杨云军
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