Studies of Vitamin K3 synthesis over Ti-containing mesoporous material

In this paper we report the synthesis of Vitamin K3 or Menadione by selective oxidation of 2-methyl naphthalene with H₂O₂ using Ti-MCM-41 synthesized by different methods. We studied the relationship between the catalytic activity and the structural characteristics and the coordination number of Ti of the catalyst. Different parameters affecting the oxidation of 2-methyl naphthalene like amount of the catalyst, hydrogen peroxide/substrate ratio, reaction temperature and the nature of the solvent are described. The experiment design—response surface methodology is used in this work to optimize the selective oxidation of 2-methyl naphthalene to vitamin K3. The application of this methodology lead us to a better understanding of the influence of the different factors (amount of catalyst, reaction temperature, H₂O₂ and reaction time); and their interactions, reducing the operation costs, achieving efficiency and effectiveness in this process.     

Catalytic Activity of ZSM-11 Zeolites Modified with Metal Cations for the Ethane Conversion

ZSM-11 zeolite samples differing by their active sites (H⁺ and different metal cations) have been studied in the transformation of ethane into aromatic hydrocarbons. A relationship between Lewis sites increasing–aromatization capacity and possible reaction steps have been suggested.