Biodiesel production is worthy of continued study and optimization of production procedures due to its environmentally beneficial attributes and its renewable nature. Heterogeneous transesterification is considered to be a green process. The process requires neither catalyst recovery nor aqueous treatment steps and very high yields of methyl esters can be obtained, close to the theoretical valu...

This review collects the major progress in field of enantioselective transformations all types promoted by chiral titanium catalysts, covering literature since beginning 2015, illustrating power these green catalysts to provide many reactions. • Enantioselective titanium-catalyzed 1,2-additions carbon nucleophiles carbonyl compounds. Asymmetric sulfoxidations catalysts. Titanium epoxidations. r...

in this research na-y was synthesized by hydrothermal method and used as support for preparation of sn/pt/na-y catalysts using two different tin precursors, bu3sn(cl) and sncl2.2h2o, by sequential impregnation, in which the pt  was deposited first and in the next step sn was deposited. the catalysts were characterized by h2 chemisorption, transmission electron microscopy (tem), scanning electro...

The use of bifunctional catalysts in organic synthesis finds inspiration in the selectivity of enzymatic catalysis which arises from the specific interactions between basic and acidic amino acid residues and the substrate itself in order to stabilize developing charges in the transition state. Many enzymes act as bifunctional catalysts using amino acid residues at the active site as Lewis acids...

The efficiency of Ni/TiO2 catalysts for renewable diesel production was evaluated in the present study. Two series were synthesized and characterized using various physicochemical techniques (N2 physisorption, XRD, SEM, XPS, H2-TPR, NH3–TPD). In first catalysts, successive dry impregnations (SDI) used depositing 10, 20, 30, 50, 60 wt.% Ni. yield towards is maximized over catalyst with 50 Ni loa...

An efficient and rapid method for the synthesis of 3,4,5-substituted furan-2 (5H)-ones has been achieved through a three-component reaction of aniline, dialkyl acetylenedicarboxylate, and aromatic aldehydes using nano-colloidal silica-tethered polyhedral oligomeric silsesquioxanes with eight branches of 3-aminopropyltriethoxysilane (nano-colloidal silica @APTPOSS) as a superior catalyst under m...