Thermal decomposition of waste linear alkylbenzene sulfonate / Hyung Ju Lee in Industrial & engineering chemistry research, Vol. 47 n°21 (Novembre 2008)  

Public ISBD [article]  inIndustrial & engineering chemistry research > Vol. 47 n°21 (Novembre 2008) . - p. 8412–8415 Titre : Thermal decomposition of waste linear alkylbenzene sulfonate Type de document : texte imprimé Auteurs : Hyung Ju Lee, Auteur ; Kyun Young Park, Auteur ; Monn surk-silk, Auteur Année de publication : 2008 Article en page(s) : p. 8412–8415 Note générale : chemical engineering Langues : Anglais (eng) Mots-clés : thermal decompositionlinear alkylbenzene Résumé : A thermal decomposition is proposed to convert a waste linear alkylbenzene sulfonate (LAS) into a solid material that is environmentally more favorable and disposable at a lower cost. The waste LAS is a viscous liquid containing sulfur as high as 13.3 wt %. The waste LAS was heated in a nitrogen atmosphere at 200−300 °C for 1−4 h. The thermal treatment at 250 °C for 2 h decomposed the waste into vapors and a solid material or residue, 2.0 wt % in sulfur content. The vapors were cooled with water to form two condensate layers in the receiving cylinder. The upper layer was identified to be a linear alkylbenzene (LAB) and the lower one a mixture of water and organic sulfur oxy compounds. The uncondensed vapor that left the condenser was determined to be a mixture of SO2, SO3, and H2SO4. A material balance shows that the mass of the waste LAS charged was distributed in the decomposition products as follows: the solid residue, 65.3%; the LAB, 5.6%; the mixture of water and organic sulfur compounds, 5.6%; the mixture of SO2, SO3, and H2SO4, 21.5%; unidentifiable loss, 2.0%. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie800382n [article] Thermal decomposition of waste linear alkylbenzene sulfonate [texte imprimé] / Hyung Ju Lee, Auteur ; Kyun Young Park, Auteur ; Monn surk-silk, Auteur . - 2008 . - p. 8412–8415. chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 47 n°21 (Novembre 2008) . - p. 8412–8415 Mots-clés : thermal decompositionlinear alkylbenzene Résumé : A thermal decomposition is proposed to convert a waste linear alkylbenzene sulfonate (LAS) into a solid material that is environmentally more favorable and disposable at a lower cost. The waste LAS is a viscous liquid containing sulfur as high as 13.3 wt %. The waste LAS was heated in a nitrogen atmosphere at 200−300 °C for 1−4 h. The thermal treatment at 250 °C for 2 h decomposed the waste into vapors and a solid material or residue, 2.0 wt % in sulfur content. The vapors were cooled with water to form two condensate layers in the receiving cylinder. The upper layer was identified to be a linear alkylbenzene (LAB) and the lower one a mixture of water and organic sulfur oxy compounds. The uncondensed vapor that left the condenser was determined to be a mixture of SO2, SO3, and H2SO4. A material balance shows that the mass of the waste LAS charged was distributed in the decomposition products as follows: the solid residue, 65.3%; the LAB, 5.6%; the mixture of water and organic sulfur compounds, 5.6%; the mixture of SO2, SO3, and H2SO4, 21.5%; unidentifiable loss, 2.0%. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie800382n

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