Tuning Ethanol Upgrading toward Primary or Secondary Alcohols by Homogeneous Catalysis

Producing specific secondary alcohols via ketone catalysis

Jing Wu et al. have synthesized enantiomerically pure secondary alcohols under mild reaction conditions. The stereospecific alcohols, formed by the hydrosilylation of prochiral ketones, are intermediates in the manufacturing of industrial compounds and pharmaceuticals. Previous methods for creating the alcohols have been hampered by the high cost of metal catalysts, low substrate-to-catalyst ra...

Homogeneous Catalysis Homogeneous Catalysis

Upgrading light hydrocarbons via tandem catalysis: a dual homogeneous Ta/Ir system for alkane/alkene coupling.

Light alkanes and alkenes are abundant but are underutilized as energy carriers because of their high volatility and low energy density. A tandem catalytic approach for the coupling of alkanes and alkenes has been developed in order to upgrade these light hydrocarbons into heavier fuel molecules. This process involves alkane dehydrogenation by a pincer-ligated iridium complex and alkene dimeriz...

Vacuum residue upgrading by pyrolysis-catalysis procedure over mesoporous ZSM-5 zeolite

A systematic study of two-staged upgrading process of vacuum residue for light fuel production has been carried out in a semi-batch binary reactor apparatus over Y, ZSM-5 and alkaline treated ZSM-5 zeolites. Prepared catalyst samples were characterized with XRD and BET. Density and Viscosity physical properties parameters estimation, as well as GC/SIMDIS analyses were conducted on liquid produc...

Primary Healthcare Solo Practices: Homogeneous or Heterogeneous?

Introduction. Solo practices have generally been viewed as forming a homogeneous group. However, they may differ on many characteristics. The objective of this paper is to identify different forms of solo practice and to determine the extent to which they are associated with patient experience of care. Methods. Two surveys were carried out in two regions of Quebec in 2010: a telephone survey of...