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Catalytic activity of H3PW12O40/aliquat 336 in epoxidation of (Z,E,E)-1,5,9-cyclododecatriene to (E)-1,2-epoxy-(Z,E)-5,9-cyclododecadiene / Agnieszka Wolosiak in Industrial & engineering chemistry research, Vol. 50 N° 12 (Juin 2011) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 50 N° 12 (Juin 2011) . - pp 7101–7108 Titre : Catalytic activity of H3PW12O40/aliquat 336 in epoxidation of (Z,E,E)-1,5,9-cyclododecatriene to (E)-1,2-epoxy-(Z,E)-5,9-cyclododecadiene Type de document : texte imprimé Auteurs : Agnieszka Wolosiak, Auteur ; Grzegorz Lewandowski, Auteur ; Eugeniusz Milchert, Auteur Année de publication : 2011 Article en page(s) : pp 7101–7108 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Catalytic  system Résumé : The influence of the technological parameters on the epoxidation of (Z,E,E)-1,5,9-cyclododecatriene (CDT) with 30% hydrogen peroxide to (E)-1,2-epoxy-(Z,E)-5,9-cyclododecadiene (ECDD) was studied under the conditions of phase transfer catalysis (PTC), in the presence of H3PW12O40/Aliquat 336 catalytic system. The parameters considered included stirring speed, the molar ratios of CDT:H2O2 and H2O2:H3PW12O40, temperature, and the nature and concentration of solvent. The variation ranges of these parameters ensuring a high CDT conversion and high selectivity of transformation to ECDD were established. The CDT conversion was 51.4–55.6% and the selectivity of transformation to ECDD was 79.8–95.1% DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie1021738 [article] Catalytic activity of H3PW12O40/aliquat 336 in epoxidation of (Z,E,E)-1,5,9-cyclododecatriene to (E)-1,2-epoxy-(Z,E)-5,9-cyclododecadiene [texte imprimé] / Agnieszka Wolosiak, Auteur ; Grzegorz Lewandowski, Auteur ; Eugeniusz Milchert, Auteur . - 2011 . - pp 7101–7108. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 50 N° 12 (Juin 2011) . - pp 7101–7108 Mots-clés : Catalytic  system Résumé : The influence of the technological parameters on the epoxidation of (Z,E,E)-1,5,9-cyclododecatriene (CDT) with 30% hydrogen peroxide to (E)-1,2-epoxy-(Z,E)-5,9-cyclododecadiene (ECDD) was studied under the conditions of phase transfer catalysis (PTC), in the presence of H3PW12O40/Aliquat 336 catalytic system. The parameters considered included stirring speed, the molar ratios of CDT:H2O2 and H2O2:H3PW12O40, temperature, and the nature and concentration of solvent. The variation ranges of these parameters ensuring a high CDT conversion and high selectivity of transformation to ECDD were established. The CDT conversion was 51.4–55.6% and the selectivity of transformation to ECDD was 79.8–95.1% DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie1021738

The influence of technological parameters on dehydrochlorination of dichloropropanols / Eugeniusz Milchert in Industrial & engineering chemistry research, Vol. 51 N° 9 (Mars 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 9 (Mars 2012) . - pp. 3575–3579 Titre : The influence of technological parameters on dehydrochlorination of dichloropropanols Type de document : texte imprimé Auteurs : Eugeniusz Milchert, Auteur ; Anna Krzyzanowska, Auteur ; Agnieszka Wolosiak-Hnat, Auteur Année de publication : 2012 Article en page(s) : pp. 3575–3579 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Dichloropropanols  Hydroxide Résumé : The influence of technological parameters on dehydrochlorination of dichloropropanols to epichlorohydrin performed on a reaction-stripping column and a prereactor was studied. For a fixed flows of dichloropropanols solution, lime milk solution, and steam through the column, the conversion of dichloropropanols and the yield of epichlorohydrin were calculated. The influence of an excess of lime milk solution, recirculation of the water layer of the distillate from the column, the rate of steam flow through the column, and an excess of calcium hydroxide over dichloropropanols on the course of the process was studied. Moreover, the effects of the reaction time and temperature of the prereactor were tested. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie202630n [article] The influence of technological parameters on dehydrochlorination of dichloropropanols [texte imprimé] / Eugeniusz Milchert, Auteur ; Anna Krzyzanowska, Auteur ; Agnieszka Wolosiak-Hnat, Auteur . - 2012 . - pp. 3575–3579. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 9 (Mars 2012) . - pp. 3575–3579 Mots-clés : Dichloropropanols  Hydroxide Résumé : The influence of technological parameters on dehydrochlorination of dichloropropanols to epichlorohydrin performed on a reaction-stripping column and a prereactor was studied. For a fixed flows of dichloropropanols solution, lime milk solution, and steam through the column, the conversion of dichloropropanols and the yield of epichlorohydrin were calculated. The influence of an excess of lime milk solution, recirculation of the water layer of the distillate from the column, the rate of steam flow through the column, and an excess of calcium hydroxide over dichloropropanols on the course of the process was studied. Moreover, the effects of the reaction time and temperature of the prereactor were tested. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie202630n