Abstract
In this work we have studied the influence of various preparation variables on the activity and selectivity of Pd catalysts supported on aluminum orthophosphate in the liquid-phase reduction of benzylideneacetone with dihydrogen. Sodium tetrachloropalladiate, tetraamminepalladium(II) chloride, palladium(II) nitrate dihydrate, and palladium(II) acetylacetonate and acetate have been used as precursor salts. The catalysts have been obtained by calcination of the impregnated salts at 598 K and subsequent reduction either in a hydrogen stream or with α-phellandrene under reflux. The interaction between surface OH groups and strongly basic ligands gives rise to variable amounts of PdO upon calcination. The thermal decomposition of sodium tetrachloropalladiate and tetraamminepalladium(II) chloride yields palladium exclusively. Under our working conditions, the process is zero order in hydrogen pressure and benzylideneacetone concentration. Active sites of different coordination number are responsible for the competitive generation of 4-phenyl-2-butanone and 4-phenyl-2-butanol.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
