catalysis

Binary Pd-M (M – d-metals) systems: Pd-Ni, Pd-Cu, Pd-Ag, Pd-Au are the type of bimetallic nanomaterials which in the last decade are the subject of interested due to their increased catalytic activity in the processes of anodic oxidation of low-molecular organic substances, in particular for the oxidation of ethanol, methanol, glycerin, formic acid, which is the subject of the application in sensors and, especially in the fuel cells. Perspective for the last in the aspect of catalysis of anode and cathode processes is a system of Pd-Au.

Methods of intensification of the process of liquid-phase cyclohexane oxidation in the presence of complex catalytic systems, catalytic solutions and individual catalysts have been considered in the article. Quantitative and qualitative influences of binary catalytic systems which contain cobalt naphthenate and organic modifiers of different nature have been determined. The research confirmed the assumption of complexation involving components of the catalytic solutions in the reaction mixture. The structural formula of possible intermediate catalytic complex has been built.

Quantitative and qualitative influence of the binary catalytic systems containing [cobalt naphthenate – polyhydric alcohol] on liquid-phase homogeneous catalytic oxidation of cyclohexane was considered. Розглянуто кількісний та якісний вплив бінарних каталітичних систем складу [нафтенат кобальту – багатоатомний спирт] на рідиннофазне гомогенно-каталітичне окиснення циклогексану. 

The basic regularities of influence of amino acid glycine in the homogeneous liquid-phase catalytic cyclohexane oxidation was researched. 
Досліджено  основні  закономірності  впливу  амінокислоти  гліцин  на  рідиннофазне гомогенно-каталітичне окиснення циклогексану.

Metacrylonitrile obtained by oxidative amonolysis over different oxidative catalysts has been investigated. Instead of isobutylene an alternative raw material has been investigated for the metacrylonitrile synthesis.

In the article intercommunication is considered between efficiency of action of difficult catalytic solutions [cobalt naftenate – polyethyleneglicol – cyclohexanone] in the process of liquid-phase oxidization of cyclohexane and complexes formation between the component components of catalytic solutions.

Regularities of methanol oxidation by atmospheric oxygen on the catalyst Fe2(MoO4)3/MoO3/CaO = 1 : 0.7 : 0.3 have been studied. It was found that the speed of the process in a model flow reactor obeys the first order equation with the observed rate constant of 1.0 sec1 and the apparent activation energy of 65 kJ/mol. It was established that the selectivity of formaldehyde in the process with once-through conversion over 45 % sharply decreases.

The kinetics of catalytic alkylation of 2,6-di-tert-butylphenol (ArOH) with methyl acrylate (MA) in the presence of potassium 2,6-di-tert-butylphenoxide (ArOK) depends on the method for the preparation of ArOK. The reaction of ArOH with KOH at temperatures > 453 K affords monomeric ArOK, which properties differ from those in the case of potassium 2,6-di-tert-butylphenoxide synthesized by the earlier methods. The regularities of ArOH alkylation depend on the ArOK concentration, the ArOH:MA ratio, and the effect of microadditives of polar solvents.

Influence of individual compounds with innercomplex properties in the liquid phase cyclohexane oxidation process has been considered.

The effect of barium salts (nitrate, sulphate, chloride) on the physico-chemical and catalytic properties of Fe:Te:Mo (1:0.85:1) oxide catalyst has been determined for oxidative amonolysis of isobutyl alcohol (IBA) to methacrylonitrile (MAN). The catalyst doped with BaCl2 (Ba/Mo = 0.1) was found to be the best catalyst relatively to the MAN yield. It has been shown that the promotors increase the catalyst specific surface and affect catalyst surface acidity improving the catalyst efficiency.