Full metadata record
DC Field | Value | Language |
---|---|---|
dc.contributor.author | 서영웅 | - |
dc.date.accessioned | 2017-11-21T00:34:48Z | - |
dc.date.available | 2017-11-21T00:34:48Z | - |
dc.date.issued | 2016-01 | - |
dc.identifier.citation | RESEARCH ON CHEMICAL INTERMEDIATES, v. 42, Page. 57-70 | en_US |
dc.identifier.issn | 0922-6168 | - |
dc.identifier.issn | 1568-5675 | - |
dc.identifier.uri | https://link.springer.com/article/10.1007%2Fs11164-015-2224-x | - |
dc.identifier.uri | http://hdl.handle.net/20.500.11754/31704 | - |
dc.description.abstract | In catalytic decomposition of dimethylhexane-1,6-dicarbamate (HDC) into hexamethylene-1,6-diisocyanate (HDI), Zn-containing homogeneous (i.e., zinc acetate) and heterogeneous (i.e., ZnO) catalysts were active among a number of catalysts tested, due to the great electron withdrawing ability of Zn ions. Particularly, when polyethylene glycol dimethyl ether was used as a solvent, ZnO was found to be relatively robust, because the catalytic performance was maintained up to the third use (HDC conversion of 93 % and HDI yield of 67 % at 180 A degrees C for 1 h). Through investigation of a HDC/ZnO mixture at elevated temperatures by IR spectroscopy, a possible reaction scheme of ZnO-catalyzed decomposition of HDC was proposed. The H atom is removed from the N-H group of HDC by hydrogen bonding with an O site on the ZnO surface, followed by coordination of an O-C=O group in monodentate mode to a Zn site. The C-O group in the O-C=O linkage is then cleaved yielding the isocyanate and surface methoxide species. Finally, methanol is released from ZnO by a reaction between the surface methoxide and the hydroxyl species. | en_US |
dc.description.sponsorship | This research was supported by the Fusion Research Program for Green Technologies through the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT & Future Planning (2012M3C1A1054501). | en_US |
dc.language.iso | en | en_US |
dc.publisher | SPRINGER | en_US |
dc.subject | Catalytic decomposition | en_US |
dc.subject | Hexamethylene-1,6-diisocyanate | en_US |
dc.subject | Dimethylhexane-1,6-dicarbamate | en_US |
dc.subject | ZnO | en_US |
dc.title | Phosgene-free decomposition of dimethylhexane-1,6-dicarbamate over ZnO | en_US |
dc.type | Article | en_US |
dc.relation.volume | 42 | - |
dc.identifier.doi | 10.1007/s11164-015-2224-x | - |
dc.relation.page | 57-70 | - |
dc.relation.journal | RESEARCH ON CHEMICAL INTERMEDIATES | - |
dc.contributor.googleauthor | Hyun, Min Jeong | - |
dc.contributor.googleauthor | Shin, Mi | - |
dc.contributor.googleauthor | Kim, Yong Jin | - |
dc.contributor.googleauthor | Suh, Young-Woong | - |
dc.relation.code | 2016002497 | - |
dc.sector.campus | S | - |
dc.sector.daehak | COLLEGE OF ENGINEERING[S] | - |
dc.sector.department | DEPARTMENT OF CHEMICAL ENGINEERING | - |
dc.identifier.pid | ywsuh | - |
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