Abstract
With the purpose of development of high efficiency catalysts for reactions of the oxidative conversion of lower olefins and paraffins into the desired products of petrochemical industry it has been synthesized by ion exchange method a range of the metalzeolite catalysts on the basis of synthetic (NaY) and natural (pure and dealuminated clinoptilolite and mordenite) zeolites and the cations of different metals. It has been established that the metalzeolite catalysts prepared on the basis of synthetic zeolite NaY shows relatively high activity in the oxidative conversion of ethylene and propylene into acetaldehyde and acetone accordingly. It has been also synthesized a highly effective metalzeolite catalysts for the processes: oxidative conversion of methane into ethylene; oxidative conversion of propane into acetaldehyde and formaldehyde; oxidative conversion of methane to ethylene and acetylene; oxidative conversion of methane to 1,4-butanediol
Highlights
The development of high efficiency metalzeolite catalysts for the gas phase reactions of oxidation of ethylene and propylene into acetaldehyde and acetone as well as for oxidative conversion of methane into ethylene and partial oxidation of propane into acetaldehyde and formaldehyde is of great significance with point of view of industrial realization.In the literature, by way of the catalysts for oxidation of ethylene and propylene into acetaldehyde and acetone have been suggested the different salts of palladium on the surface of the different carriers, palladium with additions deposited on surface of aluminum oxide and palladium and copper containing zeolites
The experimental data indicated that metalzeolite catalyst PdCuNaY containing 1.5% of ions of palladium and 6.0% of ions of copper shows relatively high activity in the reaction of oxidation of ethylene and propylene into acetaldehyde and acetone
Influence of degree of exchange ions of Na with cations of calcium on the catalytic activity is explained by hypothesis according which the activity of the catalyst is determined by existing of the non-compensated electric charge arised because of that one bicharged cation cannot form equivalent bonds with two charged tetrahedron of AlO4
Summary
The development of high efficiency metalzeolite catalysts for the gas phase reactions of oxidation of ethylene and propylene into acetaldehyde and acetone as well as for oxidative conversion of methane into ethylene and partial oxidation of propane into acetaldehyde and formaldehyde is of great significance with point of view of industrial realization. In the present paper has been given the results of the investigation on selection of high efficiency metalzeolite catalysts of oxidation ethylene and propylene into acetaldehyde and acetone ; oxidative conversion of methane into ethylene; partial oxidation of propane into acetaldehyde and formaldehyde; oxidation of propylene to acrolein; oxidative conversion of methane into ethylene and acetylene and oxidative conversion of methane into 1,4-butanediol. It has been prepared series of the specimens of metalzeolites modified with cations of the different metals (Pd2+, Cu2+, Mg2+, Ca2+, Sr2+, Ba2+, Sn2+, Li+ ) on the basis of synthetic zeolite (NaY) and Azerbaijan natural zeolites. Crystallinity of natural clinoptilolite and mordenite, composition of the zeolite and the metallzeolites have been determined with using of the instruments: BRUKER D2 PHASER and JCP-MS Agilent 7700
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