Heterogeneous catalysts for esterification reaction: Esterification via saccharine, melamine and sulfonic acid mediated silica solid catalysts

Heterogeneous catalysts for esterification reaction: Esterification via saccharine, melamine and sulfonic acid mediated silica solid catalysts

von Farook Adam, Hasnah Osman, Kasim Hello
Taschenbuch - 9783843388450
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Beschreibung

Sodium silicate from rice husk ash was functionalized with different silylating agents to produce silica with -CH2-Cl (labelled as RHACCl), -CH2-NH2 (labelled as RHAPrNH2) and -CH2-SH (labelled as RHAPrSH) end groups via a novel one-pot synthesis. Saccharine (Sac) and Melamine (Mela) were immobilized onto RHACCl to form RHAC-Sac and RHAPrMela. The functionalized -CH2-SH group in RHAPrSH was oxidized to sulfonic acid, -CH2-SO3H (labelled as RHAPrSO3H) with hydrogen peroxide at room temperature. The catalysts showed good textural and structural properties. RHAC-Sac, RHAPrMela, RHAPrSO3H, RHA-Blank (as control) as well as homogenous Sac and homogenous Mela were used as catalysts in the esterification reaction. The catalytic activity was found to follow the sequence: RHAPrSO3H RHAPrMela homogenous Sac RHAC-Sac homogenous Mela RHA-Blank. The catalysts were easily regenerated and could be reused several times without loss of catalytic activity.

Details

Verlag LAP Lambert Acad. Publ.
Ersterscheinung Januar 2011
Maße 223 mm x 152 mm x 15 mm
Gewicht 348 Gramm
Format Taschenbuch
ISBN-13 9783843388450
Auflage Nicht bekannt
Seiten 212

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