Supported metals on porous solids as heterogeneous catalysts for the synthesis of propargylamines

Propargylamines are one of the aza-compounds very often observed in many drug molecules. Hence, considerable efforts have been made to obtain these target molecules in very high yields and selectivity....

Kaolin and bentonite catalysts efficiencies for the debutylation of 2-tert-butylphenol

Yemeni clays (bentonite and kaolin) were used as catalysts and catalysts supported metals ions Ce, Pt, Pt-Ce, Pd, Pd-Ce, for the debutylation reaction of 2-tert-butylphenol. The two clays were characterized using atomic absorption spectroscopy, particle size analyzer and N2-BET adsorption method. The activity of debutylation reaction was found to depend on the type of the catalyst. Kaolin based catalysts were more active than those bentonite based. The Selectivity of the catalysts was found to depend on the type of treatment that each catalyst was subjected to. The catalysts that were treated by calcination were more selective towards phenol formation (debutylation reaction of 2-tertbutylphenol), while those treated by reduction were more selective toward the formation of 4-tert-butylphenol (isomerization reaction of 2-tertbutylphenol).

Regulating Pd/Al2O3 catalyst by g-C3N4 toward enhanced selectivity of isoprene hydrogenation

The catalytic performance of supported metals could be influenced by the impurities on support. In this work, we regulated the surface properties of commercial Pd/Al2O3 by a thermally and chemically...