Zeolites Modified Metal Cations as Catalysts in Hydrocarbon Oxidation and the Alkyl Alcohol

Abstract

The results of studies on the creation of highly metalltceolitnyh systems and the study of their catalytic activities in the oxidation of lower olefin hydrocarbons (ethylene to acetaldehyde, acetone, propylene, butylene methyl ethyl ketone); aliphatic C 1 -C 5 alcohols to their corresponding aldehydes, ketones, carboxylic acids and carboxylic acid esters; oxidative dehydrogenation of naphthenes in the alicyclic diene hydrocarbons and the oxidative dimerization of methane to acetylene. It has been established that the selectivity of these catalysts determined optimal combination of metal components with the acidity and the structure of the zeolite. Selected highly effective catalysts for the reactions studied. Based on the results of experimental studies of the kinetics of the reactions of oxidation of lower olefin hydrocarbons and aliphatic alcohols, the oxidative dehydrogenation of naphthenes and oxidative coupling of methane on the synthesized catalysts are represented by their probable stepwise mechanism and kinetic models developed reactions.

Catalytic Oxidative Conversion of Lower Olefins and Paraffins Over Zeolites Modified With Different Metal Cations

“…The increasing of concentration of ions of calcium from 5 to 7% (% from weight of catalyst) increases of the activity of metalzeolite catalyst, the further increasing of concentration of ions of calcium does not significantly influence on the activity of metalzeolite catalyst, Clin Ca (exp. [11][12][13][14]. With the purpose of the increasing of the selectivity of the process, this catalyst was modified by ions of lithium.…”

“…By means of variation of concentrations of the cations it has been determined the active consist of the catalyst Clin(10.8) Ca(8.0%) Li(7.0%) Mg(8.0%) (exp. 31) [11][12][13][14].…”

Oxidative Conversion of Lower Olefins and Paraffins Over the Modified Zeolite Catalysts

“…The increasing of concentration of ions of calcium from 5 to 7% (% from weight of catalyst) increases of the activity of metalzeolite catalyst, the further increasing of concentration of ions of calcium does not significantly influence on the activity of metalzeolite catalyst, Clin Ca (exp. [11][12][13][14].…”

“…With the purpose of the increasing of the selectivity of the process this catalyst was modified by cations of lithium (exp. [11][12][13][14][15][16][17][18][19]. It can be seen from these data incorporation of cations on lithium increases of selectivity and activity of the catalyst.…”

Synthesis of Targeted Catalyst for the Oxidative Dehydration of Sec-Butanol and Study of the Kinetics and Mechanism of the Process

“…The reaction of heterogeneous partial oxidation of aliphatic alcohols on the surface of metal zeolite catalysts occurs as a result of the interaction of these alkoxide formations with surface nucleophilic oxygen [13][14][15].…”