Zobrazeno 1 - 10
of 189
pro vyhledávání: '"N. C Marziano"'
Publikováno v:
Journal of Molecular Catalysis A: Chemical. 290:79-87
Beckmann rearrangement of cyclohexanone oxime to ɛ-caprolactam has been studied in heterogeneous liquid/solid system at room temperature and pressure. In this first part preparation, characterization and reactivity of impregnated strong acids on sol
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::07bfd59b40741c8716a688e682ec5fc8
https://doi.org/10.1016/j.molcata.2008.05.007
https://doi.org/10.1016/j.molcata.2008.05.007
Publikováno v:
Journal of Molecular Catalysis A: Chemical. 235:26-34
The reactivity of a nitrosating agent (N2O3) on oxidations of alcohols and the methyl group of acetophenone were tested. Active electrophylic surface nitrosonium ions (NO+) was detected on H2SO4/SiO2 catalysts by Raman spectroscopy, suggesting a surf
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7722808f0e9af8c60434b8d9dd9396c6
https://doi.org/10.1016/j.molcata.2005.03.008
https://doi.org/10.1016/j.molcata.2005.03.008
Publikováno v:
Catalysis Today. :225-229
The oxidative properties of N2O3 and NO+ ion towards methyl or methylene groups of enolizable ketones are tested at 25 °C in homogeneous and heterogeneous acid systems. The results in concentrated aqueous sulphuric acid show that reasonable good yie
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2b2579c376c0112e7ee7323498071016
https://doi.org/10.1016/j.cattod.2004.03.038
https://doi.org/10.1016/j.cattod.2004.03.038
Publikováno v:
Catalysis Letters. 64:15-22
Methyl esters of benzoic and mesitoic acid have been prepared with high yields (>98 wt%) from the corresponding carboxylic acids + methanol in aprotic solvents over samples of H2SO4/SiO2 at 60°C. The results show a high catalytic efficiency of the s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b85f5f7a7f6f02f6895536e3f58133f3
https://doi.org/10.1023/a:1019010230769
https://doi.org/10.1023/a:1019010230769
Publikováno v:
Catalysis Letters. 58:81-87
Solid acids prepared by adding sulfuric acid on silica gel have been used as catalysts in the nitration of nitrobenzenes and their properties have been tested by kinetic studies at 25°C. Nitration rates in concentrated aqueous solutions of sulfuric
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9414826c0c92ce524c203364bc1ab991
https://doi.org/10.1023/a:1019073732760
https://doi.org/10.1023/a:1019073732760
Publikováno v:
Catalysis Letters. 56:159-164
The protonation equilibria of weak bases (B) in solid acids (HClO4/SiO2, CF3SO3H/SiO2, H2SO4/SiO2) were studied by UV spectroscopy and the results were compared to those obtained for analogous compounds in concentrated aqueous solutions of strong aci
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ceefb3ab777aa20392bc80e117f0d231
https://doi.org/10.1023/a:1019096726458
https://doi.org/10.1023/a:1019096726458
Publikováno v:
Journal of the Chemical Society, Perkin Transactions 2. :1973-1982
The protonation–dehydration equilibrium of nitric acid (HNO3 + H+ ⇌ H2O + NO2+) has been studied in the range 80–94 wt% H2SO4 as a function of temperature and the variations of [NO2+]/[HNO3] ratios have been analysed to evaluate the dissociatio
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f2f4ed3e038ead8e10ee2f5e6fc43db6
https://doi.org/10.1039/a802521e
https://doi.org/10.1039/a802521e
Publikováno v:
Journal of the Chemical Society, Perkin Transactions 2. :2535-2540
Concentrated aqueous sulfuric acid mixtures, which ionize according to the equilibria (a) and (b) [(a) HSO4– ⇄ SO42– + H+; (b) H2SO4 ⇄ HSO4– + H+], have been analysed and the corresponding activity coefficient functions [Mc(s)] of the solve
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::51c3f566f1f18e090cf5a68dcc34c253
https://doi.org/10.1039/a803473g
https://doi.org/10.1039/a803473g
Publikováno v:
ChemInform. 22
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ece55c5e238e64049fe4c2097498be33
https://doi.org/10.1002/chin.199124097
https://doi.org/10.1002/chin.199124097
Publikováno v:
ChemInform. 23
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::855734b6e301a97f05809d03c05a0b29
https://doi.org/10.1002/chin.199202131
https://doi.org/10.1002/chin.199202131