مقاله Influence of formic acid and water on the [Pd(OAc)2(dppp)] catalyzed ethene–carbon monoxide copolymerization carried out in aprotic organic solvents : تی پی بین

خلاصه مقاله

The copolymerization of ethene with carbon monoxide catalyzed by [Pd(OAc)₂(dppp)] in an aprotic solvent such as 1,4-dioxane or nitromethane is efficiently promoted both by H₂O and HCOOH and yields a perfectly alternating polyketone (PK). The influence of the concentration of the promoters, pressure and temperature on the catalyst productivity and the limiting viscosity number (LVN) has been studied. The productivity increases with the increase of temperature and pressure. The LVN increases upon increasing the pressure and lowering the temperature. At 363 K and 9.0 MPa, in HCOOH/H₂O/1-4,dioxane (2.7/1.35/1 molar ratio), the productivity is 37.50 kgPK (gPd h)⁻¹ (LVN 2.77 dL g⁻¹). LVN lowers upon increasing the concentration of the acid, suggesting that it is involved in the protonolysis chain-transfer process.

نویسندگان

Andrea Vavasori [ Department of Molecular Sciences and Nanosystems, Ca’ Foscari University of Venice, Dorsoduro 2137, 30123 Venice, Italy ]

Lucio Ronchin [ Department of Molecular Sciences and Nanosystems, Ca’ Foscari University of Venice, Dorsoduro 2137, 30123 Venice, Italy ]

Luigi Toniolo [ Department of Molecular Sciences and Nanosystems, Ca’ Foscari University of Venice, Dorsoduro 2137, 30123 Venice, Italy ]

کلمات کلیدی

Palladium catalyst Carbon monoxide Ethene Solvent effect Polyketone

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مشاهده مقالات

2012 Applied Catalysis A: General

The scope of Applied Catalysis A: General includes the following:Scientific understanding of any catalytic phenomenon .Phenomena of relevance to current industrial processes, processes under industrial development or of interest for future commercial applications are particularly welcome. Heterogeneous, homogeneous and biocatalysts are included .Research investigating catalytic actions of heterogeneous, homogeneous, biological and natural systems are especially encouraged. Scientific aspects of preparation, activation, aging, deactivation, rejuvenation, regeneration and start up transient effects of commercially interesting or representative model catalysts. Scientific methods of characterization of catalysts, especially if they are applicable to industrial catalysts .Chemical engineering aspects relevant to an improved understanding of catalytic phenomena or application to catalysis. Results involving a joint approach by chemical engineering and catalytic science are particularly welcome. New catalysts, catalytic reactions, catalytic routes and processes of potential practical interest. Catalysis and catalytic processes for sustainable practices, including sustainable energy supply and consumption processes, and sustainable chemicals production.

حوزه های تحت پوشش : Petrochemical industry , Catalytic Science , chemical scientists in both industrial and academic fields