Continuous flow hydrolysis of phosphate esters using membrane reactor containing cyclodextrins (Articolo in rivista)

Type
Label
  • Continuous flow hydrolysis of phosphate esters using membrane reactor containing cyclodextrins (Articolo in rivista) (literal)
Anno
  • 2002-01-01T00:00:00+01:00 (literal)
Alternative label
  • Trotta F. 1, Drioli E. 2, Manferti C. 1, Gordano A. 2 (2002)
    Continuous flow hydrolysis of phosphate esters using membrane reactor containing cyclodextrins
    in Separation and purification technology (Print)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Trotta F. 1, Drioli E. 2, Manferti C. 1, Gordano A. 2 (literal)
Pagina inizio
  • 61 (literal)
Pagina fine
  • 67 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 28 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#descrizioneSinteticaDelProdotto
  • Many industrial processes are performed in the presence of a suitable catalyst. Recently the use of the enzymes is continuously growing up thanks to their high selectivity and activity. New technologies allow many chances to immobilize enzymes. Moreover, the activity of enzymes is greatly influenced by temperature, pH and ionic strength. On the other hand, cyclodextrins, non-reducing, cyclic and non-toxic oligosaccharides, are fully proven to be enzymelike catalysts, but they are stable in a wide range of temperature, pH and solvents. In particular, cyclodextrins have been already immobilized into PEEK-WC membrane to perform the hydrolysis of carboxylic acid esters. Continuous flow hydrolysis of PNPDPP was carried out by using a membrane reactor containing suitable CD derivatives. Enzyme-like catalysis was detected and higher conversion was observed in comparison with homogeneous conditions. The particular microenvironment of membrane supporting CD greatly promotes the reaction. The catalytic efficiency (K2/KM) is close to that of several native enzymes. Monotosyl ƒÒ -CD derivative shows a higher catalytic activity than random O-octyloxycarbonyl ƒÒ-CD derivative because of its definite molecular structure. In fact the C2, C3 hydroxyl groups that are involved in the catalytic mechanism are not hindered. These preliminary results suggest that other modified CDs could be used with superior performances and also in other reactions. These studies are in progress. (literal)
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • 1) Dipartimento di Chimica Inorganica, Chimica Fisica e Chimica dei Materiali, Universita` di Torino, Via Pietro Giuria 7, 10125 Torino, Italy; 2) Istituto per la Tecnologia delle Membrane, ITM-CNR V. P. Bucci cubo 17/C, I- 87036 Arcavacata di Rende (CS ), Italy (literal)
Titolo
  • Continuous flow hydrolysis of phosphate esters using membrane reactor containing cyclodextrins (literal)
Abstract
  • Membranes of poly(oxa-p-phenylene-3,3-phtalido-p-phenylenxoxa-p-phenylenenexoxi-p-phenylene) (PEEK-WC) containing ’Ò-cyclodextrin (’Ò -CD) derivatives (O-octyloxycarbonyl ’Ò -CD and monotosyl ’Ò -CD) have been prepared to investigate their catalytic behaviour towards the p-nitrophenyldiphenylphosphate (PNPDPP) hydrolysis. Membranes containing CD lead to very high reaction rate during the hydrolysis of PNPDPP. Best results were obtained using monotosyl ’Ò -CD 2.5 wt.% containing membrane at pH 8. (literal)
Prodotto di
Autore CNR
Insieme di parole chiave

Incoming links:


Prodotto
Autore CNR di
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#rivistaDi
Insieme di parole chiave di
data.CNR.it