Document Detail


Decomposition of nitrotoluenes from trinitrotoluene manufacturing process by Electro-Fenton oxidation.
MedLine Citation:
PMID:  18433833     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Oxidative degradation of dinitrotoluene (DNT) isomers and 2,4,6-trinitrotoluene (TNT) in spent acid was conducted by Electro-Fenton's reagents. The electrolytic experiments were carried out to elucidate the influence of various operating parameters on the performance of mineralization of total organic compounds (TOC) in spent acid, including reaction temperature, dosage of oxygen, sulfuric acid concentration and dosage of ferrous ions. It deserves to note that organic compounds could be completely destructed by Electro-Fenton's reagent with in situ electrogenerated hydrogen peroxide obtained from cathodic reduction of oxygen, which was mainly supplied by anodic oxidation of water. Based on the spectra analyzed by gas chromatograph/mass spectrometer, it is proposed that initial denitration of 2,4,6-TNT gives rise to formation of 2,4-DNT and/or 2,6-DNT, which undergo the cleavage of nitro group into o-mononitrotoluene, followed by denitration to toluene and subsequent oxidation of the methyl group. Owing to the removal of both TOC and partial amounts of water simultaneously, the electrolytic method established is potentially applied to regenerate spent acid from toluene nitration processes in practice.
Authors:
Wen-Shing Chen; Jing-Song Liang
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2008-04-22
Journal Detail:
Title:  Chemosphere     Volume:  72     ISSN:  0045-6535     ISO Abbreviation:  Chemosphere     Publication Date:  2008 Jun 
Date Detail:
Created Date:  2008-05-27     Completed Date:  2008-10-03     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0320657     Medline TA:  Chemosphere     Country:  England    
Other Details:
Languages:  eng     Pagination:  601-7     Citation Subset:  IM    
Affiliation:
Department of Chemical and Materials Engineering, National Yunlin University of Science and Technology, Yunlin 640, Taiwan, ROC. chenwen@yuntech.edu.tw <chenwen@yuntech.edu.tw>
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MeSH Terms
Descriptor/Qualifier:
Dinitrobenzenes / chemistry*,  isolation & purification*
Electrochemistry
Electrolysis
Ferrous Compounds / chemistry
Gases / chemistry
Hydrochloric Acid / chemistry
Hydrogen Peroxide / chemistry*
Iron / chemistry*
Isomerism
Minerals / chemistry
Oxidation-Reduction
Oxygen / chemistry
Sewage / chemistry
Sulfuric Acids / chemistry
Temperature
Trinitrotoluene / chemistry*,  isolation & purification*
Chemical
Reg. No./Substance:
0/Dinitrobenzenes; 0/Fenton's reagent; 0/Ferrous Compounds; 0/Gases; 0/Minerals; 0/Sewage; 0/Sulfuric Acids; 118-96-7/Trinitrotoluene; 7439-89-6/Iron; 7647-01-0/Hydrochloric Acid; 7722-84-1/Hydrogen Peroxide; 7758-94-3/ferrous chloride; 7782-44-7/Oxygen

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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