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Method for acquiring activated regenerated paracetamol pharmaceutical waste activated carbon through microwave heating

A technology of paracetamol and microwave heating, applied in chemical instruments and methods, separation methods, filter regeneration, etc., can solve the problem of secondary pollution of drugs, achieve low cost, simple production process, and reduce emissions

Inactive Publication Date: 2014-11-19
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the activated carbon specially used in the production process of paracetamol, if some metal ions are mixed with it, it will cause secondary pollution to the drug and cause immeasurable safety risks to patients

Method used

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  • Method for acquiring activated regenerated paracetamol pharmaceutical waste activated carbon through microwave heating
  • Method for acquiring activated regenerated paracetamol pharmaceutical waste activated carbon through microwave heating
  • Method for acquiring activated regenerated paracetamol pharmaceutical waste activated carbon through microwave heating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] The method for regenerating paracetamol pharmaceutical waste activated carbon by microwave heating, its specific steps are as follows: first, 20g of paracetamol pharmaceutical waste activated carbon is placed in a microwave heating furnace with a power of 40kW, and the temperature is raised to After heat preservation at 500°C for 8 minutes, the paracetamol medicinal waste activated carbon after microwave heating was dried at 105°C for 24 hours, and the activated and regenerated paracetamol medicinal activated carbon could be prepared after cooling; the paracetamol medicinal waste activated carbon had a particle size of 200 mesh and a moisture content of is 40%, and the methylene blue value is 48mg / g.

[0018] The methylene blue adsorption value of the activated and regenerated acetaminophen medicinal activated carbon prepared through the above steps was 165.0 mg / g, and the activation and regeneration yield was 94.38%.

[0019] The nitrogen adsorption curve at 77K of the...

Embodiment 2

[0021] The method for regenerating paracetamol pharmaceutical waste activated carbon by microwave heating, its specific steps are as follows: first, place paracetamol pharmaceutical waste activated carbon in a microwave heating furnace with a power of 40 kW, and raise the temperature to 600 °C at a heating rate of 150-170 °C / min. After heat preservation at 10°C for 10 minutes, dry the paracetamol pharmaceutical waste activated carbon after microwave heating at 115°C for 48 hours, and then prepare activated and regenerated paracetamol pharmaceutical activated carbon after cooling; the particle size of the paracetamol pharmaceutical waste activated carbon is 200 mesh, and the water content is 36%, and the methylene blue value is 50mg / g.

[0022] The methylene blue adsorption value of the activated and regenerated acetaminophen medicinal activated carbon prepared through the above steps was 187.5 mg / g, and the activation and regeneration yield was 90.23%.

Embodiment 3

[0024] The method for regenerating paracetamol pharmaceutical waste activated carbon by microwave heating, its specific steps are as follows: first, place paracetamol pharmaceutical waste activated carbon in a microwave heating furnace with a power of 1 kW, and raise the temperature to 700 °C at a heating rate of 145-150 °C / min. After heating at 8°C for 8 minutes, the paracetamol medicinal waste activated carbon after microwave heating was dried at 110°C for 36 hours, and after cooling, the activated and regenerated paracetamol medicinal activated carbon could be prepared; the paracetamol medicinal waste activated carbon had a particle size of 200 mesh and a water content of 34%, methylene blue value is 40mg / g.

[0025] The methylene blue adsorption value of the activated and regenerated acetaminophen medicinal activated carbon prepared through the above steps was 172.5 mg / g, and the activation and regeneration yield was 90.54%.

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Abstract

The invention relates to a method for acquiring activated regenerated paracetamol pharmaceutical waste activated carbon through microwave heating and belongs to the technical field of resource recycling. The method for acquiring paracetamol pharmaceutical waste activated carbon through microwave heating comprises the following specific steps: paracetamol pharmaceutical waste activated carbon is placed in a microwave oven with power ranging from 0 to 40kW; the temperature rises to 500-700 DEG C at the heating rate of 145-175 DEG C / min and heat preservation is performed for 8-10 min; and the microwave heated paracetamol pharmaceutical waste activated carbon is dried for 24-48 h at the temperature ranging from 105 to 115 DEG C and then is cooled to acquire activated regenerated paracetamol pharmaceutical waste activated carbon. The method works without the use of protective gas, thereby simplifying the test process and operation, consuming less energy and producing no pollution. The activated regenerated activated carbon is characterized in that the absorption property is restored, the specific surface area reaches 1000 m<2> / g above, the total pore volume ranges from 0.95 ml / g to 1.10 ml / g, and the activating regeneration yield exceeds 90%.

Description

technical field [0001] The invention relates to a method for regenerating paracetamol pharmaceutical waste activated carbon by microwave heating, and belongs to the technical field of resource recycling. Background technique [0002] Paracetamol is one of the main analgesics at present. It is non-irritating to the digestive tract and will not cause coagulation disorders. It has become the main development of antipyretic analgesics. Paracetamol will produce a large amount of impurities during the preparation process, which will cause huge pollution to water resources, so the treatment of paracetamol sewage has become a top priority. Activated carbon mainly plays the role of removing impurities and decolorization in the production process of paracetamol. During the production of paracetamol, activated carbon powder is put in from the top of the reactor, fully mixed and reacted with paracetamol wastewater, and then the waste activated carbon is filtered out through a filter. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/34B01J20/20B01J19/12
Inventor 夏洪应张声洲张利波吴坚彭金辉王仕兴刘秉国许磊
Owner KUNMING UNIV OF SCI & TECH
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