Reuse process of waste activated carbon produced in acetaminophen refining section

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

Active Publication Date: 2017-09-12
浙江康乐药业股份有限公司
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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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  • Reuse process of waste activated carbon produced in acetaminophen refining section
  • Reuse process of waste activated carbon produced in acetaminophen refining section
  • Reuse process of waste activated carbon produced in acetaminophen refining 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] ③Add 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 waste...

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Abstract

The invention discloses a process for reusing waste activated carbon produced in acetaminophen refining section, including using the waste activated carbon produced in acetaminophen refining section for pretreatment of high-concentration organic wastewater produced in acetaminophen production The process and the waste activated carbon filtered out in step (1) are regenerated to obtain a finished activated carbon with a methylene blue decolorization power of 17ml / 0.1g or more, a yield increased to 40%, and an activation speed shortened to within 15S. The process of the present invention combines the characteristics of the waste activated carbon and waste water produced by the production of acetaminophen, so that the activated carbon can be utilized to the greatest extent, and the purpose of turning waste into treasure and recycling can be achieved; it can reduce production costs, reduce consumption, reduce The role of pollutant discharge.

Description

technical field [0001] The invention relates to a regeneration process of waste activated carbon, and belongs to the field of material recovery and reuse. Background technique [0002] Acetaminophen is a commonly used antipyretic and analgesic drug. Its current consumption ranks first among antipyretic and analgesic drugs in the world, and the global annual consumption is about 150,000 tons. In the production process of acetaminophen, a large amount of activated carbon is required for refining, and the general dosage reaches about 11% of the finished product output. The spent activated carbon is discharged as waste after finishing the refining process. [0003] It takes 25 tons of wood or 70m2 to produce one ton of activated carbon 3 Simply discard the once-used waste activated carbon (referred to as waste carbon), which not only wastes resources, but also brings pollution problems of solid waste. Since the 1990s, my country has begun to recycle these waste activated carb...

Claims

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Application Information

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Patent Type & Authority Patents(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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