catalysts

Composition and Activity of Copper-Palladium Catalyst on Carbon Fiber Material for Air Purification from Carbon Monoxide

A set of research methods ($X$-ray phase, desorption, kinetic) was used to determine the state of the basic components ${K}_{2}{Pd}{Cl}_{4}$ and $Cu(NO_3)_2$ in the catalyst for the oxidation of carbon monoxide by oxygen. It was found that the palladium (II) and copper (II) initial compounds under the action of carbon fiber carrier change their state. Palladium is reduced to $X$-ray amorphous $Pd^0$, and copper (II) is in the form of a crystalline phase ${Cu}_2(OH)_3Cl$.

An Oligomer with Terminal Unsaturated Double Bonds Based on Epidian 5 and Ethylacrylic Acid

An oligomer with terminal unsaturated double bonds (unsaturated oligomer, UO) has been synthesized from epoxy resin Epidian 5 and ethylacrylic acid. The impact of the catalyst nature, temperature, and reaction duration on the progress of the reaction between the resin and the acid has been studied. A synthetic technique is proposed for producing the UO. The UO has been characterized by chemical and FTIR-spectroscopic analyses. The UO has been examined in the cross-linking processes with oligoesteracrylates TGM 3 and MGP 9 as well as unsaturated polyester PE 246.

INFLUENCE OF TUNGSTEN COMPOUNDS ON REACTION OF 1-OCTENE EPOXIDATION BY TERT-BUTYL HYDROPEROXIDE AND HYDROPEROXIDE DECOMPOSITION

Catalytic ability of tungsten compounds in the reaction of hydroperoxide epoxidation of 1- octene and tert-butyl hydroperoxide decomposition was investigated. It is shown that the nature of ligand has significant effect on the catalytic activity of tungsten compounds in these reactions. It is established that boride and silicide of tungsten are the best choice for epoxidation reaction, whereas tungsten carbide exhibits poor activity. Tungsten boride is also the most active in the hydroxide decomposition reaction.

The Non-Sodium Nickel Hydroxycarbonate for Nanosized Catalysts

The samples of non-sodium nickel hydroxycarbonate for nanosized catalysts have been obtained and investigated. The ratio of crystalline water, the amount of nickel hydroxide and carbonate has been calculated. By the X-ray analysis of obtained nickel oxide the crystallite size of 12–13 nm has been determined. The samples of catalysts provided a high specific surface.

Aсtivity of binary vinadium compounds in reaction of epoxidation of 1-octene and decomposition of tert-butyl hydroperoxide

The influenceof vanadium-containing compounds as catalysts on the reaction of 1-octene epoxidation by tert-butyl hydroperoxide and the decomposition of this hydroperoxide was investigated. It is shown that the catalytic activity of vanadium compounds depends on catalyst ligand nature. It is established that vanadium boride and carbide are the most active catalysts for hydroperoxide epoxidation, while V2O5 is the most active catalyst oftert-butyl hydroxide decomposition. The highest selectivity of 1,2-epoxyoctene formation is observed when VC is used as a catalyst.

Perfluorooxasulphonates of Metals – the Catalysts of Esters Manufacture

The process of obtaining of aliphatic dibasic esters from dicarboxylic acids and C4-C5 alcohols in the presence of perfluoro(4–methyl–3,6–dioxaoctane)sulphonates of different metals has been researched. For the comparative estimation of catalysts their concentration was chosen identical and of such value that the rate of the process was limited exactly by the rate of chemical reaction. The dependences of technological characteristics of esterification process on catalyst nature and concentration and on reagents nature have been determined.