Recycling process for waste activated carbon generated in acetaminophen refining working section

A paracetamol, waste activated carbon technology, applied in the petroleum industry, filter regeneration, water/sludge/sewage treatment, etc., can solve the problems of high requirements for equipment and supporting facilities, harsh oxidation conditions, and high treatment costs, reaching The effect of reducing pollutant discharge, reducing consumption, and reducing production costs

Active Publication Date: 2016-03-30
浙江康乐药业股份有限公司
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  • Abstract
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  • Claims
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Problems solved by technology

However, the conditions of wet air oxidation are harsh and require high temperature (such as above 200°C) and high pressure (pressure of tens of kilograms), which requires high equipment and supporting facilities; Fenton oxidation will produce a large amount of iron sludge, which will produce solid waste after treating wastewater ; At the same time, the processing costs of the two methods are relatively high

Method used

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  • Recycling process for waste activated carbon generated in acetaminophen refining working section
  • Recycling process for waste activated carbon generated in acetaminophen refining working section
  • Recycling process for waste activated carbon generated in acetaminophen refining working section

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Embodiment

[0022] 1. Wastewater pretreatment process:

[0023] ① Adjust the pH of the wastewater to about 5-8 (preferably 7) with alkali,

[0024] ②The oxidation-polymerization reaction is carried out by introducing air at a temperature of 30-90°C (preferably 50-80°C),

[0025] ③ Add a certain amount of waste carbon (10-20% w / v) to adsorb the formed oxidation polymerization product,

[0026] ④ After filtering the activated carbon, the color of the waste liquid becomes lighter obviously, from dark brown to light yellow or light red, and the COD also drops significantly. The remaining COD in the pretreated waste liquid is basically formed by acetic acid after analysis, and can enter the biochemical treatment system .

[0027] ⑤The waste charcoal that has been pretreated by wastewater enters the waste charcoal regeneration system.

[0028] 2. Waste carbon regeneration process:

[0029] ① The waste activated carbon is screened by a screening machine to remove large impurities in the wast...

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Abstract

The present invention discloses a recycling process for waste activated carbon generated in an acetaminophen refining working section. The process comprises the following steps: a preprocessing process using the waste activated carbon generated in the acetaminophen refining section for high-concentration organic wastewater generated in acetaminophen production, and a waste activated carbon regeneration treatment process on the waste activated carbon filtered in step (1), thereby obtaining finished activated carbon, wherein the methylene blue decolorizing capacity is 17ml / 0.1g or above, the yield is improved to be 40%, and the activation rate is shortened within 15s. According to the process disclosed by the present invention, in the combination with the characteristics of the waste activated carbon and wastewater generated in acetaminophen production, the activated carbon is enabled to be mostly used, so that objectives of turning waste into treasure and recycling are achieved; and the effects of reducing the production cost, reducing the consumption, and reducing the pollutant discharge are reached.

Description

Technical field [0001] The invention involves the regeneration process of waste activated carbon, which is the field of recycling and reuse of materials. Background technique [0002] Acetaminophen is a commonly used medicine for relieving heat and analgesics. The current amount is ranked first among the world's analgesic drugs, and the global consumption of the world is about 150,000 tons.In the production process of acetylphenol, a large amount of activated carbon is required for refining, and the general dosage reaches about 11%of the finished product output.After completing the refining process, waste activated carbon is excreted as waste. [0003] To produce a ton of activated carbon, it consumes 25 tons of wood or 70m 3 The simplicity of the use of waste activated charcoal (referred to as waste charcoal) once will not only waste resources, but also bring the pollution problem of solid waste.Since the 1990s, my country has begun to recycle these waste activated carbon. It ha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/28C02F1/66C02F1/74B01J20/34B01J20/20C02F101/30C02F103/36
Inventor 余泳华陈俊宇滕宁杰董小虹
Owner 浙江康乐药业股份有限公司
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