Polypropylene (PP) random copolymers are an important class of commercial materials that can be tuned for a wide range different applications. The structure–property relations mainly discussed in this article focusing on two major influencing factors, the catalyst system and type amount comonomer. Ziegler–Natta (ZN) systems still dominate production polypropylene todays sixth-generation ZN cata...

supported catalysts synthesized via the interaction of mg(oet)2 with ticl4 in the presence or absence of an internal stereoregulating donor (di-n-butyl phthalate), with different solvents (chlorobenzene, n-undecane, n-heptane) at different titanation temperatures have been studied by a set of physicochemical methods. data on the chemical composition, x-ray structure and pore structure of these ...

Alkene hydrosilylation is amongst the largest industrial homogenous catalysis processes. Cobalt offers a sustainable alternative to commonly used platinum catalysts achieve this transformation. Using two bisiminopyridine cobalt(II) regiodivergent of alkenes has been developed. Variation pre-catalyst activator and ligand substituents were investigated enable controlled, both aryl- alkyl-substitu...

Nanocatalysis is a rapidly growing research field which involves the use of nanomaterials as catalysts for both homogenous and heterogeneous catalysis. Because of the huge surface area contrasted to bulk matter nanomaterials can function as more efficient catalysts. The main challenge in applying nanoparticles in catalysis is to stabilize and control their size. This problem can be solved by in...

The number of organic pollutants detected in water and wastewater is continuously increasing thus causing additional concerns about their impact on public environmental health. Therefore, catalytic processes have gained interest as they can produce radicals able to degrade recalcitrant micropollutants. Specifically, ozonation has received considerable attention due its ability achieve advanced ...

in this research different types of al2o3 were used as supports to prepare catalysts for dehydrogenation of isobutane to isobutene. these supports were al2o3 from merck, axen and gamma al2o3 synthesized from al(oh)3. sn/pt/al2o3 catalysts were prepared by sequential impregnation, at first pt and then sn was deposited. characterization of catalysts was performed by x-ray powder diffraction (xrd)...

Enzymes are highly specific catalysts that typically function in aqueous solvents. However, many enzymes retain their catalytic activities at high concentrations in non-aqueous environments, including neat hydrophilic organic solvents. In fact, enzymes can be used to carry out reactions in organic solvents that are not possible in aqueous systems. Therefore, biocatalysis in homogenous non-aqueo...