catalyst

The influence of immobilized and homogeneous Rh-contained complex, [Rh(CO)2Cl]2, on the oxidation reaction of 1-octene by molecular oxygen on the initial stages of process was investigated. It was established that the immobilized as well as homogeneous rhodium complex activate the oxidation reaction in the presence of radical processes initiator – hydroperoxide tert-butyl. It was shown that the usage of the immobilized catalyst allows to reach higher process parameters at lower amount of the applied rhodium complex. 

Проведено спектрографічні дослідження бінарних каталітичних систем для
процесу окиснення циклогексану на основі нафтенату кобальту з використанням
органічних модифікаторів різної природи – етанолу та гліцину у циклогексаноні.
Проведені дослідження підтверджують припущення про комплексоутворення за участю
всіх компонентів каталітичних розчинів. Побудовано структурні формули ймовірних
комплексів каталітичних систем. The spectral analysis of binary catalytic solutions based on cobalt naphthenate for the

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.

The investigation results of the regularities of diesters of aliphatic dicarboxylic acids obtained in the presence of aprotic catalysts – Lewis acids – have been generalized. The effect of catalysts (metal salts) nature and concentrations, reagents nature and ratio, water content in them, as well as the influence of reaction temperature on the technological characteristics of esterification process have been determined. The technological aspects of the process have been examined in the presence of aprotic acids. The investigated catalysts may be reused in the technological process

The structure of CuCl2, CuCl catalyst active centres on the surface of γ-Al2O3 has been investigated on the basis of X-ray diffraction analysis. The influence of the catalyst structure on the mechanism of ethylene oxidative chlorination has been determined. Using mass spectroscopy the difference in the structure of active centers and the mechanism of the deposited and impregnated types of CuCl2, CuCl/γ-Al2O3 catalysts in the process of ethylene oxidative chlorination into 1,2-dichlorethane has been studied.

The ultrasonic treatment of Fe2-Bi-Mo2-Ox catalyst of ethylbenzene oxidative dehydration to styrene has been studied. Its physico-chemical properties have been compared with those of non-activated catalyst before and after operation. It has been shown that the catalyst prepared from salts solution activated by ultrasound has better activity and increases styrene yield under the same conditions.

The preparation methods and main characteristics of known catalysts for carbon monoxide oxidation have been examined. A short review in a tabular form which facilitates a quick view on catalysts for CO oxidation (mainly cobalt ones) is represented.

Two samples of brominated multi-walled carbon nanotubes [(Br)n-MWCNTs] produced by the plasma-chemical technique were involved in the liquid-phase initiated oxidation of cumene. The powerful catalytic effect of (Br)n-MWCNTs has been confirmed to recommend the substances for the use in oxidation of alkyl aromatic hydrocarbons as active additives. Obviously this phenomenon originates from the peculiarities of electronic configuration of (Br)n-MWCNTs pattern.

In the present work, the pyrolysis of polypropylene and polyethylene was evaluated with and without the addition of niobium oxide as catalyst by means of thermogravimetric analysis and experiments in a glass reactor. The results revealed that niobium oxide performed well in the pyrolysis of both polypropylene and polyethylene separately. For the mixture of polypropylene with polyethylene, the catalyst reduced the pyrolysis time.