2002
DOI: 10.1016/s0920-5861(02)00062-7
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Catalysis and fine chemistry

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Cited by 92 publications
(59 citation statements)
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“…It is obvious, that glycerol which has primary and secondary alcohol functions, and can be condensed with itself to different kind of polyglycerols (Barrault et al, 1998). Polyglycerols can be obtained at high temperature vapor phase reaction over solid catalysts as alkali and alkaline earth metal hydroxides or carbonates, zeolites, La-ion-exchanged zeolites and ion-exchanger resins (Barrault et al, 1998). In the presence of resins, the main product is the diglycerol.…”
Section: Compoundmentioning
confidence: 99%
See 1 more Smart Citation
“…It is obvious, that glycerol which has primary and secondary alcohol functions, and can be condensed with itself to different kind of polyglycerols (Barrault et al, 1998). Polyglycerols can be obtained at high temperature vapor phase reaction over solid catalysts as alkali and alkaline earth metal hydroxides or carbonates, zeolites, La-ion-exchanged zeolites and ion-exchanger resins (Barrault et al, 1998). In the presence of resins, the main product is the diglycerol.…”
Section: Compoundmentioning
confidence: 99%
“…By separating and recycling the starting materials and the mono-ethers the residue can be mixed with the ester phase formed in the trans-esterification when a mixture is formed containing 12 % ethers and 88 % methyl esters. Its clouding point is below 0 °C and having a viscosity of 5.94 cSt which is lower with 9 o C and 0.5 cSt, respectively, if this parameters are compared to the ester phase without the addition of glycerol ethers (Barrault et al, 1998). The oxygenate mixtures produced in the abovementioned ways ensures that a very complex mixture of compounds could be manufactured, in which all components of the ABE fermentation and biodiesel production turn into fuel component.…”
Section: Compoundmentioning
confidence: 99%
“…ábra: Növényi olajok glicerinnel való átészterezése [38] Corma és munkatársai olyan bázikus katalizátorok jelenlétében vizsgálták a monogliceridek előállítását, mint a szepiolit-Na-Cs, MCM-41-Cs, MgO, és különböző Al/Al+Mg arányú hidrotalcitok [38]. A MgO bázikusságát -s ezáltal aktivitását -Li + beépítésével sikerült nö-velni [43]. Mivel ezek a katalizátorok a reakcióelegyből szűréssel könnyedén eltávolíthatók, elkerülhető a melléktermékek képződése, és nem szükséges semlegesre mosni, míg ez a hagyományos eljárásoknál elengedhetetlen [38].…”
Section: A Glicerin éSzterezéseunclassified
“…Feltehetően ennek köszönhető, hogy a lerakódó koksz kevésbé tudta károsítani a pórusrendszert (43. ábra), így felülete kevésbé csökken. 43. ábra: Új és használt RNi-212 44. ábra: Új és használt RNi-222C…”
Section: Raney-nikkelunclassified
“…235 También ha sido descrito el empleo de catalizadores sólidos básicos para la transesterificación del glicerol con triglicéridos 236 o con ésteres metílicos de ácidos grasos. 88,235,237,238 Sin embargo, no hay constancia en la literatura del empleo de catalizadores básicos sólidos para la reacción de transesterificación del PEG con esteres metílicos de ácidos grasos (Esquema 4.1). En este apartado se ha estudiado la naturaleza de los centros básicos (Lewis o Brönsted), así como, la fuerza básica necesaria para llevar a cabo la reacción de transesterificación entre el oleato de metilo (OM) y varios PEG de distintos pesos moleculares con el fin de obtener monoésteres de ácidos grasos con polietilenglicol utilizados como surfactantes.…”
Section: Industria Alimentaria Tejidos Y Fibras Cosméticos Y Farmacéuunclassified