Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Regeneration method of activated carbon for treating ibuprofen decolorization process

A technology of activated carbon and waste activated carbon, which is used in separation methods, filter regeneration, chemical instruments and methods, etc., to achieve the effects of small carbon loss, low energy consumption and high selectivity

Active Publication Date: 2014-02-12
QINGDAO UNIV OF SCI & TECH +1
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention overcomes the deficiencies in the prior art, and proposes a method for regenerating waste activated carbon in the ibuprofen decolorization process with lower total cost, higher regeneration rate and higher economic benefits. The method selects ethanol solution as the extraction agent, which not only solves the problem of The problem that new adsorbates may be introduced during the regeneration process of the solvent method is solved, and the ethanol solution has high selectivity for ibuprofen and hardly washes out the pigment. The extractant can recover ibuprofen through recrystallization, and the regeneration is complete. , no secondary pollution

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Mix 1000kg of activated carbon with 6250kg of ethanol solution with a mass fraction of 75%, and perform solvent regeneration at 60°C. After regeneration for 1 hour, filter while hot and collect the filtrate. Repeat the above steps to perform secondary solvent regeneration on the filter cake, and determine the ibuprofen content in the filtrate by titration. In the thermal regeneration stage, staged heating is adopted. First, heat to 105°C to collect a small amount of water and ethanol remaining in the activated carbon, and then heat to 300°C for 1 hour to obtain regenerated carbon.

[0015] The water content of the above-mentioned waste activated carbon is 14%, and the ibuprofen content is 25%. Determined by analysis, the recovery rate of ibuprofen was 91%, and the regeneration rate of activated carbon was 82%.

Embodiment 2

[0017] Mix 500kg of activated carbon with 3120kg of ethanol solution with a mass fraction of 75%, and perform solvent regeneration at 62°C. After regeneration for 1 hour, filter while hot and collect the filtrate. Repeat the above steps to perform secondary solvent regeneration on the filter cake, and determine the ibuprofen content in the filtrate by titration. The thermal regeneration stage adopts the staged heating method, first heating to 105°C to collect a small amount of water and ethanol remaining in the activated carbon, and then heating to 305°C and maintaining it for 1 hour to obtain regenerated carbon.

[0018] The water content of the above-mentioned waste activated carbon is 15%, and the ibuprofen content is 24%. Determined by analysis, the recovery rate of ibuprofen was 90%, and the recovery rate of activated carbon was 81%.

Embodiment 3

[0020] Mix 2000kg of activated carbon with 12490kg of ethanol solution with a mass fraction of 75%, and perform solvent regeneration at 60°C. After regeneration for 1 hour, filter while hot and collect the filtrate. Repeat the above steps to perform secondary solvent regeneration on the filter cake, and determine the ibuprofen content in the filtrate by titration. In the thermal regeneration stage, staged heating is adopted. First, heat to 110°C to collect a small amount of water and ethanol remaining in the activated carbon, and then heat to 302°C for 1 hour to obtain regenerated carbon.

[0021] The water content of the above-mentioned waste activated carbon is 14%, and the ibuprofen content is 24%. Determined by analysis, the recovery rate of ibuprofen was 93%, and the regeneration rate of activated carbon was 81%.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a regeneration method of activated carbon for treating ibuprofen decolorization process. After un-dried waste activated carbon is put in a reactor, a separator and a regeneration kettle, the pigment and other impurities are subjected to thermal decomposition by strict temperature control to realize the regeneration of activated carbon. An ethanol solution is used as an extractant, so that the problem that a novel adsorbent possibly can be introduced in a solvent regeneration process can be solved, and the ethanol solution has high selectivity of ibuprofen, and almost can not wash the pigment out at the same time, the ibuprofen can be recovered with the extractant in a recrystallized way, the regeneration is full, and no secondary pollution is generated. By the method, the pigment and other impurities can be thermally decomposed at low temperature, the energy consumption is low, the carbon loss is low and the regeneration rate is high.

Description

technical field [0001] The invention relates to a waste activated carbon regeneration technology, in particular to a regeneration method for treating activated carbon in the ibuprofen decolorization process. Background technique [0002] Ibuprofen is a non-steroidal anti-inflammatory analgesic drug, which has the advantages of good therapeutic effect and small side effects, and has been developed rapidly in recent years. At present, a variety of synthetic methods of ibuprofen have been developed, but only epoxy carboxylate method and IBPE carbonylation method are truly industrialized. The ibuprofen produced by the above two methods has a darker color except for a certain amount of impurities. If it is not refined and purified, it cannot meet the requirements of pharmaceutical grade ibuprofen. At present, activated carbon is often used in industry to adsorb and decolorize ibuprofen, and then obtain pure ibuprofen through a process of recrystallization. This just needs to co...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/34B01J20/20C07C57/30C07C51/42C07C51/43
Inventor 王英龙张玲朱兆友牛志芳
Owner QINGDAO UNIV OF SCI & TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com