Recovery of dinitrotoluenes and trinitrotoluene from spent acid of toluene nitration process by solvent extraction
Extraction using hexane or heptane solvent was employed to recover dinitrotoluene (DNT) isomers and 2,4,6-trinitrotoluene (TNT) from spent acid after toluene nitration process. Multiple stages experiments were conducted to elucidate the influence of various operating variables on the performance of...
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| Veröffentlicht in: | Separation and purification technology 2005-04, Vol.43 (1), p.95-101 |
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| creator | Chen, Wen-Shing Juan, Chien-Neng Wei, Kuo-Ming |
| description | Extraction using hexane or heptane solvent was employed to recover dinitrotoluene (DNT) isomers and 2,4,6-trinitrotoluene (TNT) from spent acid after toluene nitration process. Multiple stages experiments were conducted to elucidate the influence of various operating variables on the performance of removal of organic compounds from spent acid, including extracting temperature, volume ratio of solvent versus acid, spent sulfuric acid concentration and organic compounds content of the feedstock. It was found that organic compounds extracted reached nearly 78%, of which solubility in spent acid depends strongly upon the sulfuric acid concentration. In both cases of hexane and heptane, the extracting priority of organic compounds is in the following order: 2,3-DNT
>
2,6-DNT
>
3,4-DNT
>
2,4-DNT
>
2,4,6-TNT. Furthermore, this method established is promising for regeneration of spent acid preliminarily. |
| doi_str_mv | 10.1016/j.seppur.2004.10.005 |
| format | Article |
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>
2,6-DNT
>
3,4-DNT
>
2,4-DNT
>
2,4,6-TNT. Furthermore, this method established is promising for regeneration of spent acid preliminarily.</description><identifier>ISSN: 1383-5866</identifier><identifier>EISSN: 1873-3794</identifier><identifier>DOI: 10.1016/j.seppur.2004.10.005</identifier><language>eng</language><publisher>Amsterdam: Elsevier B.V</publisher><subject>Applied sciences ; Chemical engineering ; Dinitrotoluene ; Exact sciences and technology ; Extraction ; Liquid-liquid extraction ; Spent acid ; Trinitrotoluene</subject><ispartof>Separation and purification technology, 2005-04, Vol.43 (1), p.95-101</ispartof><rights>2004 Elsevier B.V.</rights><rights>2005 INIST-CNRS</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c367t-6fc1aa0d7dfe4009fe6251132985d58e8009251963d9cfc3e9270f9829c97dad3</citedby><cites>FETCH-LOGICAL-c367t-6fc1aa0d7dfe4009fe6251132985d58e8009251963d9cfc3e9270f9829c97dad3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://dx.doi.org/10.1016/j.seppur.2004.10.005$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,780,784,3550,27924,27925,45995</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=16653362$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>Chen, Wen-Shing</creatorcontrib><creatorcontrib>Juan, Chien-Neng</creatorcontrib><creatorcontrib>Wei, Kuo-Ming</creatorcontrib><title>Recovery of dinitrotoluenes and trinitrotoluene from spent acid of toluene nitration process by solvent extraction</title><title>Separation and purification technology</title><description>Extraction using hexane or heptane solvent was employed to recover dinitrotoluene (DNT) isomers and 2,4,6-trinitrotoluene (TNT) from spent acid after toluene nitration process. Multiple stages experiments were conducted to elucidate the influence of various operating variables on the performance of removal of organic compounds from spent acid, including extracting temperature, volume ratio of solvent versus acid, spent sulfuric acid concentration and organic compounds content of the feedstock. It was found that organic compounds extracted reached nearly 78%, of which solubility in spent acid depends strongly upon the sulfuric acid concentration. In both cases of hexane and heptane, the extracting priority of organic compounds is in the following order: 2,3-DNT
>
2,6-DNT
>
3,4-DNT
>
2,4-DNT
>
2,4,6-TNT. Furthermore, this method established is promising for regeneration of spent acid preliminarily.</description><subject>Applied sciences</subject><subject>Chemical engineering</subject><subject>Dinitrotoluene</subject><subject>Exact sciences and technology</subject><subject>Extraction</subject><subject>Liquid-liquid extraction</subject><subject>Spent acid</subject><subject>Trinitrotoluene</subject><issn>1383-5866</issn><issn>1873-3794</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2005</creationdate><recordtype>article</recordtype><recordid>eNp9kEtLxDAUhYsoOD7-gYtsdNcxado02QgivmBAEF2HmNxAhk5TczuD8-9NmRFx4yrhnO_cm5yiuGB0zigT18s5wjCs07yitM7SnNLmoJgx2fKSt6o-zHcuedlIIY6LE8QlpaxlspoV6RVs3EDakuiJC30YUxxjt4YekJjekTH9EYlPcUVwgH4kxgY3xX6siTNjiD0ZUrSASD62BGO3mWD4yqad3LPiyJsO4Xx_nhbvD_dvd0_l4uXx-e52UVou2rEU3jJjqGudh5pS5UFUDWO8UrJxjQSZtSwowZ2y3nJQVUu9kpWyqnXG8dPiajc3v-ZzDTjqVUALXWd6iGvUlRS8lbLOYL0DbYqICbweUliZtNWM6qlgvdS7gvVU8KTmgnPscj_foDWdT6a3AX-zQjSciypzNzsO8mc3AZJGG6C34EICO2oXw_-LvgFrvJZ9</recordid><startdate>20050415</startdate><enddate>20050415</enddate><creator>Chen, Wen-Shing</creator><creator>Juan, Chien-Neng</creator><creator>Wei, Kuo-Ming</creator><general>Elsevier B.V</general><general>Elsevier Science</general><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7U5</scope><scope>8FD</scope><scope>L7M</scope></search><sort><creationdate>20050415</creationdate><title>Recovery of dinitrotoluenes and trinitrotoluene from spent acid of toluene nitration process by solvent extraction</title><author>Chen, Wen-Shing ; Juan, Chien-Neng ; Wei, Kuo-Ming</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c367t-6fc1aa0d7dfe4009fe6251132985d58e8009251963d9cfc3e9270f9829c97dad3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2005</creationdate><topic>Applied sciences</topic><topic>Chemical engineering</topic><topic>Dinitrotoluene</topic><topic>Exact sciences and technology</topic><topic>Extraction</topic><topic>Liquid-liquid extraction</topic><topic>Spent acid</topic><topic>Trinitrotoluene</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Chen, Wen-Shing</creatorcontrib><creatorcontrib>Juan, Chien-Neng</creatorcontrib><creatorcontrib>Wei, Kuo-Ming</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Solid State and Superconductivity Abstracts</collection><collection>Technology Research Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Separation and purification technology</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Chen, Wen-Shing</au><au>Juan, Chien-Neng</au><au>Wei, Kuo-Ming</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Recovery of dinitrotoluenes and trinitrotoluene from spent acid of toluene nitration process by solvent extraction</atitle><jtitle>Separation and purification technology</jtitle><date>2005-04-15</date><risdate>2005</risdate><volume>43</volume><issue>1</issue><spage>95</spage><epage>101</epage><pages>95-101</pages><issn>1383-5866</issn><eissn>1873-3794</eissn><abstract>Extraction using hexane or heptane solvent was employed to recover dinitrotoluene (DNT) isomers and 2,4,6-trinitrotoluene (TNT) from spent acid after toluene nitration process. Multiple stages experiments were conducted to elucidate the influence of various operating variables on the performance of removal of organic compounds from spent acid, including extracting temperature, volume ratio of solvent versus acid, spent sulfuric acid concentration and organic compounds content of the feedstock. It was found that organic compounds extracted reached nearly 78%, of which solubility in spent acid depends strongly upon the sulfuric acid concentration. In both cases of hexane and heptane, the extracting priority of organic compounds is in the following order: 2,3-DNT
>
2,6-DNT
>
3,4-DNT
>
2,4-DNT
>
2,4,6-TNT. Furthermore, this method established is promising for regeneration of spent acid preliminarily.</abstract><cop>Amsterdam</cop><pub>Elsevier B.V</pub><doi>10.1016/j.seppur.2004.10.005</doi><tpages>7</tpages></addata></record> |
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| ispartof | Separation and purification technology, 2005-04, Vol.43 (1), p.95-101 |
| issn | 1383-5866 1873-3794 |
| language | eng |
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| source | Elsevier ScienceDirect Journals Complete |
| subjects | Applied sciences Chemical engineering Dinitrotoluene Exact sciences and technology Extraction Liquid-liquid extraction Spent acid Trinitrotoluene |
| title | Recovery of dinitrotoluenes and trinitrotoluene from spent acid of toluene nitration process by solvent extraction |
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