Palladium-loaded polymeric

Volkov V. V, Petrova I. V, Lebedeva V. I., Roldughin V. I. and Tereshchenko G.F. (2011), Palladium-loaded polymeric membranes for hydrogenation in catalytic membrane reactors, in A. Basile and F. Gallucd (Eds), Membranes for Membrane Reactors Preparation, Optimization and Selection, John Wiley Sons Ltd, Chichester, UK, 531-548. 

Palladium loaded resins can be utilized for the process of catalytically removing oxygen from boiler feedwater (Scheme 11.9). Scientists from Lanxess have reported that their basic polymeric resins can be used in a fixed bed reactor for this application [43]. 

Bunz demonstrated a facile procedure for the preparation of high quality PAEs by a palladium-catalyzed cross-coupling reaction of acetylene gas with diiodoarenes. The polymerization proceeds at 50 °C, and poly(phenylene-ethynylene)s 114 were produced. Catalyst loadings of 0.1-0.2 mol% of palladium were best to achieve the complete i ... 

Low-loaded, organophilic Pd-montmorillonites were shown to exhibit high cis-selectivity in the hydrogenation of 1-phenyl-1-alkynes working with high (=5000) substrate catalyst ratio.402 Studies with respect to the use palladium membrane catalysts403 105 and polymeric hollow fiber reactors406"408 were reported. 

Polystyrene is the most frequently used polymeric support for the immobilization of palladium complexes [15]. The PS resins are well developed in the field of sohd-phase peptide synthesis. Therefore resins bearing various chemical functional groups, diameter size, loading value, degree of cross-finking, for example, are now commercially readily available to permit investigation of these variables on the catalytic property. The most widely used polystyrene in... 

Highly active, selective, and recyclable palladium catalyst systems for the hydroesterification of styrene (at room temperature and 6 bar CO pressure) and vinyl acetate (at 40-60 °C and 6-10 bar CO pressure) were found by using l,2-bis(di-tert-butylphosphinomethyl)benzene as ligand and polymeric sulfonic adds of limited SO3H loadings as promoter [148]. 

The reactions were carried out over polymeric catalytic membranes consisting of poly(ether block amide) (PEBA) or blends of PEBA and poly(vinylpyrrolidone) (PVP) loaded with palladium nanoclusters. These membranes were used to simultaneously hydrogenate and concentrate the organic compounds in the permeate side by catalytic pervaporation. The pervaporative enrichment of the organics was achieved by a factor of 100, and a significant conversion was only obtained when the catalytic membranes were employed in pervaporation mode. 

The selective hydrogenation of propyne to propene has been studied over porous ultraflltration polymeric membranes of polyacrylonitrile (PAN), polyetherimide (PEI) or polyamideimide (PAI) or over poly(acrylic acid) membranes, treated with palladium acetate. Similarly, porous PVDF membranes, also loaded with palladium particles, were used in hydrogenation flow-through experiments of methylenecyclohexane to methylcy-clohexanone. The hydrogenation of viscous liquids such as vegetable oils could also be performed in flow-through experiments over porous polymeric membranes loaded with palladium or platinum particles. " ... 

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